H (a) Assign the C (lowercase Roman numerals - i, ii, iii, etc.) and H (lowercase Roman letters a, b, c, etc.) atoms in the given structures using the "C (top) and 'H (bottom) NMR spectra provided. 6 200 iii 150 100 PPM a PPM 2 50

H (a) Assign the C (lowercase Roman numerals - i, ii, iii, etc.) and H (lowercase Roman letters a, b, c, etc.) atoms in the given structures using the "C (top) and 'H (bottom) NMR spectra provided. 6 200 iii 150 100 PPM a PPM 2 50

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 11E

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Concept explainers

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.

Question

3D1: Apply the concepts of polarity (induction) and multiple bonds (magnetic anisotropy) to chemical shift (8) in "C NMR and 'H
NMR data
(a) Assign the C (lowercase Roman numerals i, ii, iii, etc.) and H (lowercase Roman letters a, b, c, etc.) atoms in the given structures
using the C (top) and 'H (bottom) NMR spectra provided.
Br
iv
200
b
200
iii
III
150
4
150
PPM
a
100
PPM
100
PPM
PPM
2
MacBook Air
ii
50
50
i
0
(b) Choose one (1) difference in chemical shift between the two (2) molecules and briefly explain how differences in structure account for

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