ISSN:
0749-1581
Keywords:
77Se NMR
;
Selenanes
;
Selenanones
;
3-selena-7-azabicyclo[3.3.1]nonanes
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A series of selenanes and selenanones have been examined using 77Se NMR analysis. Sharp resonances were found in all cases whether recorded at 47.7, 51.4 or 57.22 MHz or in DCCI3 or DMSO-d6. Diphenyl diselenide was used as the external reference, but all resonances were subsequently referred to dimethyl selenide (0°C, O ppm). It was observed that in the selenanone family any substituent at the α-, β- or γ-positions exerted a significant effect on the 77Se resonances. The same was true in the selenanes. Moreover, the presence of a chair-chair or chair-boat form in certain 3-selena-7-azabicyclo[3.3.1]nonan-9-ones and related 3-selena-7-azabicyclo[3.3.1]nonanes (and hydroperchlorates) induced remarkable differences in 77Se shifts. Some general observations and conclusions are delineated in terms of the influence of various groups on the 77Se resonances in these cyclic systems.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260241104
Permalink
