Accession Number:

ADA280841

Title:

Identification of the Stereoisomers of 1,2,3,4-tetramethyl-1,2,3,4- tetraphenylcyclotetrasilanes

Descriptive Note:

Technical rept.

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY

Report Date:

1994-06-30

Pagination or Media Count:

24.0

Abstract:

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.

Subject Categories:

  • Organic Chemistry
  • Physical Chemistry
  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE