An infrared spectrum of a mixture of methyl amine, CH3−NH2, and methylene imine, CH2=NH2, displayed absorptions at 1050 and 1640 cm−1cm−1, among others. Which of these two absorptions would you expect belongs to the C−N and which to the C=N stretch?

An infrared spectrum of a mixture of methyl amine, CH3−NH2, and methylene imine, CH2=NH2, displayed absorptions at 1050 and 1640 cm−1cm−1, among others. Which of these two absorptions would you expect belongs to the C−N and which to the C=N stretch?

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

Chapter19: Nuclear Magnetic Resonance Spectroscopy

Section: Chapter Questions

Problem 19.12QAP

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Question

An infrared spectrum of a mixture of methyl amine, CH3−NH2, and methylene imine, CH2=NH2, displayed absorptions at 1050 and 1640 cm−1cm−1, among others.

Which of these two absorptions would you expect belongs to the C−N and which to the C=N stretch?

-1
1050 cm
-1
belongs to C – N stretch, 1640 cm
belongs to C =N stretch
-1
-1
1640 cm
belongs to C – N stretch, 1050 cm
belongs to C =N stretch

Definition Definition Organic compounds with a nitrogen atom having a lone pair of electrons on it. Amines are derived from ammonia (NH 3 ), wherein hydrogen atoms are substituted by an aryl or alkyl group.

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