ChemInform Abstract: Synthesis and X-Ray Crystal Structure of a Novel Cerium(IV) Arylsiloxide

Autor:	A. Gleizes, K. Yunlu, P. S. Gradeff, J. Galy
Rok vydání:	1989
Předmět:	X-ray chemistry.chemical_element General Medicine Crystal structure Dimethoxyethane law.invention Ion chemistry.chemical_compound Crystallography Cerium Oxygen atom chemistry law Crystallization Monoclinic crystal system
Zdroj:	ChemInform. 20
ISSN:	0931-7597
Popis:	Ce(OSiPh 3 ) 4 · x DME (0.5 i )4 by exchange reaction with Ph 3 SiOH in dimethoxyethane (DME). Crystallization from a toluene-ether mixture yielded monocrystals of Ce(DME)(OSiPh 3 ) 4 · C 6 H 5 ,CH 3 , the crystal structure of which was determined by X-ray single-crystal techniques. It crystallizes in the monoclinic system, sp.gr. = P 2 1 / c , a = 28.078(6) A, b = 14.628(2) A, c = 18.739(5) A, β = 92.24(2)°, V = 7.691 A 3 , Z = 4, R = 0.074 for 4406 observations with I > 3σ( I ) and 319 variables. The Ce IV ion exhibits a (4 + 2) coordination by oxygen atoms with four short metal-silyloxy bonds (2 x 2.10(1) A; 2 x 2.13(1) A) and two long metal-DME bonds (2.58(1) A; 2.59(1) A).
Databáze:	OpenAIRE
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