IR of A 100- H NMR of A 2H 1H 50- 4000 3500 3000 2500 2000 Wavenumber (cmt) 1500 1000 500 11 10 ppm IR of B 100 'H NMR of B 5H 2H 50- 4000 3500 3000 2500 2000 1500 1000 500 11 10 Wavenumber (cm") ppm % Transmittance % Transmittance

IR of A 100- H NMR of A 2H 1H 50- 4000 3500 3000 2500 2000 Wavenumber (cmt) 1500 1000 500 11 10 ppm IR of B 100 'H NMR of B 5H 2H 50- 4000 3500 3000 2500 2000 1500 1000 500 11 10 Wavenumber (cm") ppm % Transmittance % Transmittance

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter24: Introduction To Spectrochemical Methods

Section: Chapter Questions

Problem 24.2QAP

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Concept explainers

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

Question

Compounds A and B have molecular formula C9H10O. Identify their structures from the 1H NMR and IR spectra given.

IR of A
100-
H NMR of A
2H
1H
50-
4000 3500 3000 2500 2000
Wavenumber (cmt)
1500
1000
500
11
10
ppm
IR of B
100
'H NMR of B
5H
2H
50-
4000 3500 3000 2500
2000
1500 1000
500
11
10
Wavenumber (cm")
ppm
% Transmittance
% Transmittance

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