Alkoxysilanes. IV. Preparation of Alkoxysiloxy Derivatives of Titanium
Alkoxysiloxy derivatives of titanium and polymeric substances with Ti–O–Si bonds were prepared. The reaction of titanium tetra-isopropoxide or bis (acetylacetonato)di-isopropoxytitanium with tri-t-butoxysilanol led to the formation of the derivatives of [(ButO)3SiO]nTi(OPri)4−n (n=2 and 3) and those...
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Published in | Bulletin of the Chemical Society of Japan Vol. 43; no. 2; pp. 466 - 469 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Tokyo
The Chemical Society of Japan
01.02.1970
Chemical Society of Japan |
Online Access | Get full text |
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Summary: | Alkoxysiloxy derivatives of titanium and polymeric substances with Ti–O–Si bonds were prepared. The reaction of titanium tetra-isopropoxide or bis (acetylacetonato)di-isopropoxytitanium with tri-t-butoxysilanol led to the formation of the derivatives of [(ButO)3SiO]nTi(OPri)4−n (n=2 and 3) and those of [(ButO)3SiO]2Ti(AcAc)2 respectively. In both of these series, the absorption peak of the Ti–O–Si bond in the IR spectrum shifted toward a lower wave number from the compounds of n=2 to those of n=3. The reaction of titanium tetra-isopropoxide with di-t-butoxysilanediol, as expected, gave a polymeric substance. In the reaction with bis(tri-t-butoxysiloxy)-silanediol, however, an unexpected cyclic compound consisting of the Ti–O–Si bond was obtained; its presence was confirmed by a study of the IR and NMR spectra, by elemental analysis, and by molecular-weight determination. In order to obtain a linear polymer, the reaction of the titanium acetylacetonato chelate with the silanediols was carried out to give a reddish-brown, highly viscous liquid or solid. These polymeric substances were soluble in common organic solvents and have an appreciable hydrolytic stability, but only a moderate thermal stability. |
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ISSN: | 0009-2673 1348-0634 |
DOI: | 10.1246/bcsj.43.466 |