How many signals would you observe in the 1H NMR spectra of these molecules? Label all the signals with the letters ofthe alphabet (A, B, etc.). Indicate the splitting pattern for each signal. Identify the most deshielded and shielded signals ineach.toBr(1) CI-(iii) CI(iv)

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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How many signals would you observe in the 1H NMR spectra of these molecules? Label all the signals with the letters of
the alphabet (A, B, etc.). Indicate the splitting pattern for each signal. Identify the most deshielded and shielded signals in
each.
to
Br
(1) CI-
(iii) CI
(iv)

Expert Solution

Step 1

The number of signals of a molecule in the proton NMR spectrum is equal to the number of different type of chemically non-equivalent protons are present in the molecule.

Splitting pattern :- It follows the (n+1) rule,

Where, n = number of chemically distinct protons on adjacent carbon.

Shielding and deshielding :- most deshielded proton will have higher chemical shift value i.e. lie in downfield and the most shielded proton will have lower chemical shift value i.e lie in upfield.

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