Identification of the Stereoisomers of 1,2,3,4-tetramethyl-1,2,3,4- tetraphenylcyclotetrasilanes
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY
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The configuration of three synthetically available stereoisomers tttt, ttcc, and tctc of 1,2,3,4-tetramethyl-1,2,3,4- tetraphenylcyclotetrasilane have been unambiguously assigned using spin labeling techniques and by preparing chemical derivatives. 1JC-Si, 2JC-Si, and 3JC-Si values were determined for the three stereoisomers with 13C labeled methyl groups. The dominating isomer resulting from the synthesis possesses an all- trans structure and can be isolated in up to 95 purity.
- Organic Chemistry
- Physical Chemistry
- Polymer Chemistry