ii) Molecular ion peak:the peak corresponding to the intact molecule (with a positive charge)What would the base peak and Molecular ion peaks when isobutane is subjectedto Mass spectrometry? Draw the structures and write the molecular weights ofthe fragments.Circle most stable cationa) tert-butyl cationb) Isopropyl cation c) Ethyl cation. d) Methyl cation6. What does a loss of 15 represent in Mass spectrum?a fragment of the molecule with a mass of 15 atomic mass units has been lost duringthe ionization Process7. Write the isotopes and their % abundance of isotopes ofi) Cl

Since tertiary alcohols have three alkyl groups, it prevents the compound to oxidized. Meaning…

Answered: ii) Molecular ion peak :the peak…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL2: Mass Spectrometry

Section: Chapter Questions

Problem 3E

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Organic Chemistry 2-part Question- Please write clearly and good quality picture IF writing.
8. What is the m/z values corresponding to the molecular ion and base peak for the following OH compound?
B
Molecular ion peak: the peak corresponding to the intact morecure (with a positive charge) 4. What would the base peak and Molecular ion peaks when isobutane is subjected to Mass spectrometry? Draw the structures and write the molecular weights of the fragments. 5. Circle most stable cation a) tert-butyl cation b) Isopropyl cation c) Ethyl cation. d)Methyl cation
D
Find the Structural Formula in 13C-NMR Spectra of C4H10O. Compute the IHD, identify the species per peak, and solve the structural formula. A. Computation: B. Analysis/ Interpretation: 1. How many types of C (number of signals and splitting signals)? 2. What types of C(chemical shift)?
QUESTION 4 Which of the following four cations would most likely appear as the base peak in the MS spectrum of diethyl ether? А. FHO, В. С. D.
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1. The two mass spectra below correspond to two isomers of CHO: 3-methyl-2-butanone and 3- pentanone. Draw the two structures. Match the spectrum with the compound and draw the fragment ion that corresponds to the base peak. a) 20 10 20 40 50 70 30 m/: b) 200 20 10 20 30 40 m/z Relative ntensity Relative ntersty
In 1-pentanol mass spectroscopy, there would be a prominent M - 18 peak in the mass spectrum Draw the structure (radical) that would give the M-18 peak. Instructions: 1) Draw the positively charged radical (Lewis structure or line structure) - not just the formula. 2) You can upload your drawing (image) here or in a file containing all your drawings (to questions that ask for drawings) in the last question. 12pt v Paragraph BI U A ✓
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Model 3: Ionization and Fragmentation Most mass spectrometers accelerate a molecule by first turning it into an ion, then using an electric field to accelerate it toward the detector. During standard ionization, a molecule loses one electron, the electron that is easiest to remove. The following is a hierarchy of electrons from easiest to hardest to remove: Electron in a lone pair (easiest) Electron that is part of a double bond (pi bond) Electron in a single bond (hardest) Knocking off an electron to make a +1 ion can be a harsh process. This harsh treatment often results in a broken bond, generating two smaller pieces, a +1 ion and a neutral fragment. (Note that only the ion is accelerated and detected.) ● 7. ● Critical Thinking Questions 6. If acetone is ionized, which electron is most likely to be knocked off? Replace this electron with a + (to indicate the missing electron) on the structure of acetone → The ion you drew above is called the "molecular ion" of acetone. It is…

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