Answered: Нь Н Н. CN Jab = 11.8 Hz Jpc = 0.9 Hz…

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Нь Н Н. CN Jab = 11.8 Hz Jpc = 0.9 Hz Jac = 18 Hz 6.6 6.2 5.7 chemical shift (ppm)

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter31: Thermal Methods

Section: Chapter Questions

Problem 31.11QAP: Describe the difference between power-compensated, heat-flux, and modulated DSC instruments.

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Concept explainers

Analyzing and Predicting Spectroscopic Data

The interaction of electromagnetic radiation with the structure of molecules in the sample and their study is referred spectroscopy. Several spectroscopic methods are used to acquire sample information, and these methods are proved to be accurate, fast, and non-destructive. The information obtained about the content and composition of molecules from these spectroscopic methods is called spectroscopic data.

Question

Label the signals due to H_a, H_b, and H_c in the ¹H NMR spectrum of acrylonitrile (CH₂=CHCN). Draw a splitting diagram for the absorption due to the H_a proton.

Нь
Н
Н.
CN
Jab = 11.8 Hz
Jpc = 0.9 Hz
Jac = 18 Hz
6.6
6.2
5.7
chemical shift (ppm)

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