Alkoxysilanes. IV. Preparation of Alkoxysiloxy Derivatives of Titanium
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概要
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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-<I>t</I>-butoxysilanol led to the formation of the derivatives of [(Bu<I><SUP>t</SUP></I>O)<SUB>3</SUB>SiO]<I><SUB>n</SUB></I>Ti(OPr<I><SUP>i</SUP></I>)<SUB>4−<I>n</I></SUB> (<I>n</I>=2 and 3) and those of [(Bu<I><SUP>t</SUP></I>O)<SUB>3</SUB>SiO]<SUB>2</SUB>Ti(AcAc)<SUB>2</SUB> 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 <I>n</I>=2 to those of <I>n</I>=3. The reaction of titanium tetra-isopropoxide with di-<I>t</I>-butoxysilanediol, as expected, gave a polymeric substance. In the reaction with bis(tri-<I>t</I>-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.
- 公益社団法人 日本化学会の論文
著者
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Kijima Ichiro
Department Of Industrial Chemistry Science University Of Tokyo
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Abe Yoshimoto
Department Of Food Science Faculty Of Health And Nutrition Tokyo Seiei College
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