ISSN:
0749-1581
Keywords:
77Se NMR
;
15N NMR
;
Cycloalkeno-1,2,3-selenadiazole derivatives
;
Electron transfer
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The 13C, 15N and 77Se NMR data (chemical shifts and coupling constants) of some cycloakeno-1,2,3-selenadiazoles are presented. Extremely large 77Se chemical shifts are found. 15N, 77Se coupling constants, obtained at natural abundance, are reported for the first time. Strong signal shifts due to different sizes of the cycloakeno rings can be qualitatively rationalized in terms of electron transfer between the nitrogen and selenium atoms. A positive γ-syn effect of the methyl group on N-3 is found in 4-methyl-4,5,6,7-tetrahydrobenzo-1,2,3-selenadiazole.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260280614
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