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17O NMR Spectra of Divinyl Ethers

✍ Scribed by Esko Taskinen

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 207 KB
Volume: 35
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199702)35:2<107::aid-omr26>3.0.co;2-y

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✦ Synopsis

The 17O NMR spectra of a number of alkyl-and phenyl-substituted divinyl ethers were recorded in CDCl 3 solution. The relationship between chemical shift and the number, nature and position of substituents was explored. The shift values, falling in the range d 100-140 ppm, were found to be remarkably insensitive to the electronic and stereochemical e †ects of substituents. The narrow range of chemical shifts is likely to arise from the ability of the O atoms of divinyl ethers to share p-p conjugation with the two oleÐnic linkages : reduced conjugation with one vinyl group may lead to enhanced conjugation with the other.

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