The logical fragmentation reactions to account for the given ion observed in the mass spectra. Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given. Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well. Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane , but fragmentation at branching is mostly favoured.

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Answer 1

Question

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

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Classify each of the following molecules as aromatic, antiaromatic, or nonaromatic. ZI NH Explanation Check O aromatic O antiaromatic O nonaromatic O aromatic O antiaromatic H O nonaromatic O aromatic O antiaromatic O nonaromatic ×

Part I. Draw the stepwise reaction mechanism of each product (a, b, c, d, e, f) HO HO OH НОН,С HO OH Sucrose HO CH₂OH H N N HO -H H -OH KMnO4, Heat H OH CH₂OH (d) Phenyl Osatriazole OH НОН,С HO HO + Glacial HOAC HO- HO CH₂OH OH HO Fructose (a) Glucose OH (b) H₂N HN‍ (c) CuSO4-5H2O, ethanol H N N N HO ·H H OH H OH N CH₂OH OH (f) Phenyl Osazone H (e) Carboxy phenyl osatriazole Figure 2.1. Reaction Scheme for the Total Synthesis of Fine Chemicals

Answer 2

Question

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

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Answer 3

Question

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

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Answer 4

Question

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

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Answer 5

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 6

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 7

Chapter 12, Problem 12.18SP

(a)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 8

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 9

(b)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 10

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 11

(c)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 12

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 13

(d)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 14

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 15

(e)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 16

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 17

(f)

Interpretation Introduction

To determine: The logical fragmentation reactions to account for the given ion observed in the mass spectra.

Interpretation: The logical fragmentation reactions to account for the given ion observed in the mass spectra are to be given.

Concept introduction: Mass spectroscopy provides a reliable molecular weight for an unknown compound and also gives us the information about the molecular formula as well.

Fragmentation gives the resonance stabilized cations whenever possible. Loss of a small molecule is usually indicated by a fragment peak having an even mass number corresponding to loss of an even mass number. Fragmentation produces the most stable carbocation and radicals when occurs in alkane, but fragmentation at branching is mostly favoured.

Answer 18

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Answer 19

Expert Solution & Answer

Answer 20

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Answer 21

Ch. 12.3 - Complete the following conversion table. (cm1)...Ch. 12.5 - Which of the bonds shown in red are expected to...Ch. 12.7C - For each hydrocarbon spectrum, determine whether...Ch. 12.9A - Spectra are given for three compounds. Each...Ch. 12.10 - The infrared spectra for three compounds are...Ch. 12.12 - Prob. 12.6P Ch. 12.14B - Identify which of these four mass spectra indicate...Ch. 12.15A - Show the fragmentation that accounts for the...Ch. 12.15A - Show the fragmentations that give rise to the...Ch. 12.15B - Ethers are not easily differentiated by their...

Solution Summary: The author explains the logical fragmentation reactions to account for the given ion observed in the mass spectra.

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Chapter 12 Solutions