Organic Chemistry
Organic Chemistry
2nd Edition
ISBN: 9781118452288
Author: David R. Klein
Publisher: WILEY
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Chapter 16.9, Problem 7LTS
Interpretation Introduction

Interpretation: Using 1HNMR concept the difference between the given compounds to be interpreted.

Concept Introduction:

Chemical shift: The frequency of the proton signal in the spectrum with reference to the standard compound  which may be TMS(Tetramethylsilane) shows signal at 0 ppm(parts per million).

Multiplicity: The number of peaks on the each signal in NMR spectrum is defined as multiplicity; the multiplicity of each signal indicates the neighboring protons. It is generated by coupling of the subjected protons with the neighboring protons (both subjected and neighbor protons are to be chemically not equivalent) separated by either two or three sigma bonds.

Rule: Multiplicity of each signal is calculated using (n+1) rule only when the neighboring protons are chemically equivalent to each other.

(n+1)where n indicates number of neighboring protons

Integration value (I): The integration value at the bottom of the 1HNMR spectrum represents the number of protons giving rise to the signal.

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Organic Chemistry

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