Accession Number : AD0714458

Title :   Structural Aspects of the Hydrolysis Products of Metal Alkoxides and Metal Trialkylsilyloxides,

Corporate Author : UNIVERSITY OF WESTERN ONTARIO LONDON DEPT OF CHEMISTRY

Personal Author(s) : Lorimer,J. W. ; Jones,D. E. G.

Report Date : 30 APR 1969

Pagination or Media Count : 6

Abstract : The average degree of polymerization n(n) depends on the average degree of hydrolysis x(n) as 1/n(n) = a + bx(n) over a large range of x(n) for all metal oxide alkoxides and oxide trialkylsilyloxides that have been formed by hydrolysis and examined in solution. A number of general theoretical models are developed which permit quantitative interpretation of the parameters a and b. Mixtures of linear or branched chains in proportions governed wholly or partly by the degree of polymerization of the unhydrolyzed alkoxide can explain all the data on oxide alkoxides in solution in their corresponding alcohol, and the model leads to a plausible mechanism for disproportionation. Similar models with more complex structure can be involved in the metal oxide trialkylsilyloxides. Heterogeneity in the composition of the repeating units or in the number of metal-oxygen-metal bridges between successive repeating units can also be significant for both oxide alkoxides and oxide trialkylsilyloxides. (Author)

Descriptors :   (*HYDROLYSIS, *SILOXANES), TRANSITION METALS, MATHEMATICAL ANALYSIS, CANADA

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE