Answered: Normal Carbon DEPT-135 DEPT-90 29 ppm…

Normal Carbon DEPT-135 DEPT-90 29 ppm Positive No peak 50 Negati ve No peak 55 Positive No peak 114 Positive Positive 126 No peak No peak 130 Positive Positive 159 No peak No peak No peak No peak 207

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

Chapter20: Molecular Mass Spectrometry

Section: Chapter Questions

Problem 20.11QAP

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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

The proton NMR spectrum for a compound with formula C10H12O2
is shown below.
The infrared spectrum has a strong band al 1711 cm-1
. The normal carbon-13 NMR
spectral results are tabulated along with the DEPT-135 and DEPT-90 information. Draw
the structure of this compound.

Normal Carbon
DEPT-135
DEPT-90
29 ppm
Positive
No peak
50
Negati ve
No peak
55
Positive
No peak
114
Positive
Positive
126
No peak
No peak
130
Positive
Positive
159
No peak
No peak
No peak
No peak
207

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