ISSN:
1042-7163
Keywords:
Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reaction of Ph2Si(NHNHMe)2 (1) with n-BuLi and Ph2SiCl2 in 1 : 2 : 1 ratio afforded 54% of 1,2,4-triaza-1-methyl-4-methylamino-3,3, 5, 5-tetraphenyl-3,5-disilacylopentane (2). In the presence of a catalytic amount of n-BuLi, 2 is rearranged to two isomers, 1,2,4,5-tetraaza-1,4-dimethyl-3,3,6,6-tetraphenyl-3,6-disilacyclohexane (3) and 1,2,4,5-tetraaza-1,5-dimethyl-3,3,6,6-tetraphenyl-3,6-disilacyclohexane (4), with 3 as the major product. The crystal structure of 3 reveals a twist-boat conformation of the Si2N4 ring [a = 10.691(4) Å, b = 13.178(4) Å, c = 17.812(3) Å, β = 95.11(7)°; monoclinic, P21/n; Z = 4], in which each—N(Me)—N(H)—unit contains one pyramidal (NH) and one planar (NMe) nitrogen.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hc.520050305
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