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cis–trans Isomerism in monoalkylhydroxamic acids by 1H, 13C and 15N NMR spectroscopy

✍ Scribed by David A. Brown; William K. Glass; Rajeswary Mageswaran; Berhane Girmay

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
238 KB
Volume
26
Category
Article
ISSN
0749-1581

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✦ Synopsis

The first example of cis-truns isomerism in monoalkylhydroxamic acids, detected by 'H, I3C and "N NMR spectroscopy, is reported. The "N NMR spectrum of CH,CO"NHOH gave a clear assignment of the OH and NH protons of both 2 and E isomers. The assignment was confirmed by 'H and "C NMR spectroscopy. A rotational barrier of isomerization (AC,') of 17.8 kcal mol-' was calculated from the variabletemperature 'H NMR spectra using the method of Shanan-Atidi and Bar-Eli.

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