a) Interpretation: The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn. Concept introduction: In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg 2+ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate. To draw: The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Question

2. Predict the NMR spectra for each of these two compounds by listing, in the NMR tables below, the chemical shift, the splitting, and the number of hydrogens associated with each predicted peak. Sort the peaks from largest chemical shift to lowest. **Not all slots must be filled** Peak Chemical Shift (d) 5.7 1 Multiplicity multiplate .......... 5.04 double of doublet 2 4.98 double of doublet 3 4.05 doublet of quartet 4 5 LO 3.80 quartet 1.3 doublet 6 Peak Chemical Shift (d) Multiplicity

Answer 1

Question

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

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2. Predict the NMR spectra for each of these two compounds by listing, in the NMR tables below, the chemical shift, the splitting, and the number of hydrogens associated with each predicted peak. Sort the peaks from largest chemical shift to lowest. **Not all slots must be filled** Peak Chemical Shift (d) 5.7 1 Multiplicity multiplate .......... 5.04 double of doublet 2 4.98 double of doublet 3 4.05 doublet of quartet 4 5 LO 3.80 quartet 1.3 doublet 6 Peak Chemical Shift (d) Multiplicity

Interpreting NMR spectra is a skill that often requires some amount of practice, which, in turn, necessitates access to a collection of NMR spectra. Beyond Labz Organic Synthesis and Organic Qualitative Analysis have spectral libraries containing over 700 1H NMR spectra. In this assignment, you will take advantage of this by first predicting the NMR spectra for two closely related compounds and then checking your predictions by looking up the actual spectra in the spectra library. After completing this assignment, you may wish to select other compounds for additional practice. 1. Write the IUPAC names for the following two structures: Question 2 Question 3 2. Predict the NMR spectra for each of these two compounds by listing, in the NMR tables below, the chemical shift, the splitting, and the number of hydrogens associated with each predicted peak. Sort the peaks from largest chemical shift to lowest. **Not all slots must be filled**

11:14 ... worksheets.beyondlabz.com 3. To check your predictions, click this link for Interpreting NMR Spectra 1. You will see a list of all the - compounds in the spectra library in alphabetical order by IUPAC name. Hovering over a name in the list will show the structure on the chalkboard. The four buttons on the top of the Spectra tab in the tray are used to select the different spectroscopic techniques for the selected compound. Make sure the NMR button has been selected. 4. Scroll through the list of names to find the names for the two compounds you have been given and click on the name to display the NMR spectrum for each. In the NMR tables below, list the chemical shift, the splitting, and the number of hydrogens associated with each peak for each compound. Compare your answers to your predictions. **Not all slots must be filled** Peak Chemical Shift (d) Multiplicity 1 2 3 4 5

Answer 2

Question

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

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Answer 3

Question

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

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Answer 4

Question

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

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Answer 5

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

Answer 6

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Answer 7

Chapter 9.SE, Problem 20MP

Interpretation Introduction

a)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.

Answer 8

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Answer 9

Interpretation Introduction

b)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.

Answer 10

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

Answer 11

Interpretation Introduction

c)

Interpretation:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.

Concept introduction:

In the first step attack of the Ï€ electrons of the triple bond on the electrophilic Hg²⁺ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.

To draw:

The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.

Answer 12

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Answer 23

Ch. 9.1 - Prob. 1P Ch. 9.1 - Prob. 2P Ch. 9.3 - What products would you expect from the following...Ch. 9.4 - Prob. 4P Ch. 9.4 - Prob. 5P Ch. 9.4 - Prob. 6P Ch. 9.4 - Prob. 7P Ch. 9.5 - Using any alkyne needed, how would you prepare the...Ch. 9.7 - The pKa of acetone, CH3COCH3, is 19.3. Which of...Ch. 9.8 - Prob. 10P

Solution Summary: The author explains the electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene.

Chapter 9 Solutions