ISSN:
0749-1581
Keywords:
Oxygen-17 NMR
;
Phosphine oxides
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The 17O NMR chemical shifts of a variety of cyclic phosphine oxides were recorded at natural abundance. The shifts proved to be extremely sensitive to structural effects such as ring size and the presence of γ-interactions. Values were found to cover a 70 ppm range. The most unusual effect was discovered with phosphine oxide groups in the 7-position of the norbornene framework. When the oxygen was anti to the double bond, exceptionally strong deshielding (by as much as 60 ppm) occurred relative to the isomer with syn oxygen. 17O NMR clearly has value as a structural diagnostic technique with phosphine oxides.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260250319
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