ISSN:
1573-9171
Keywords:
silylotropy, dynamic1H,13C, and29Si NMR
;
N-trimethylsilylpyrazoles, halogens, trimethylhalosilanes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Silylotropy in 4-substitutedN-trimethylsilypyrazoles is studied by dynamic1H,13C, and29Si NMR spectroscopy. The catalytic 1,2-migration of a trimethylsilyl group in 4-halo-N-trimethylsilylpyrazoles was detected. Silylotropy inN-trimethylsilylpyrazoles in the presence of halogens of trimethylhalosilanes is believed to proceed through formation ofN,N′-bis(trimethylsilyl)pyrazolium salts, the barrier of silylotropy in pyrazoles being markedly reduced.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01430662
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