ISSN:
0268-2605
Keywords:
Organometallics
;
Cyclic catenation systems
;
Peralkylcyclopolysilanes
;
Peralkylcyclotetrasilanes
;
Crystal and molecular structures
;
Dihedral angles
;
Cyclotetrasilane ring shapes
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The crystal structures of octaisopropylcyclotetrasilane [i-Pr2Si]4 (1) and octakis(trimethylsilylmethyl)cyclotetrasilane [(Me3SiCH2)2Si]4 (2) have been determined by means of X-ray diffraction analysis. Various crystallographic and structural data for the two compounds were recorded. The Si4 rings of the compounds are nonplanar with quite large dihedral angles of 37.1° in (1) and 36.6° in (2), being comparable to that (36.8)° for [t-BuMeSi]4 reported previously and other characteristic features in the structures of (1) and (2) were described. Some structural properties of the cyclic catenation systems, [R1R2Si]n (n = 3-6), including (1) and (2) were also discussed from a comparative viewpoint with respect to the ring shape and the relationship between ring size and Si-Si bond length.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aoc.590010207
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