ISSN:
1434-1948
Keywords:
Sulfonamidosilanes
;
[4 + 4] Octacoordinated silicon
;
Capped tetrahedron
;
X-ray structures
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Spirocyclic compounds containing an Si(N)4 core have been prepared from 1,2-ethane- and 1,3 propanediamines bearing the electron-withdrawing p-toluenesulfonyl groups at the four N atoms. According to the X-ray structure analysis of the compounds 8a and 13, the spirocyclic rings are almost perpendicular to each other. In both cases a distorted dodecahedral arrangement of a [4 + 4] octacoordinate Si atom is found in which one O atom of each of the four sulfonyl groups caps one of the planes defined by the Si(N)4 tetrahedron. The O···Si distances are 2.85-3.02 Å and the two O···Si···O angles are 145-159°. According to the X-ray structure analysis of the monocyclic compound 16, one O atom of the p-toluenesulfonyl group caps the plane defined by O1-N2-C13 of the distorted S(N2)(O)C tetrahedron.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
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