Synthesis and Properties of Thienylorganosilanes and -Siloxanes

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Abstract
By acidolysis reaction of thienylmethyldichlorosilane and 2, 5-bis(dimethylchlorosilyl)thiophene synthesis has been conducted of acetoxysilanes which at further partial hydrolytic condensation at reduced temperatures led to the formation of corresponding acetoxysiloxanes. By hydrolytic condensation of methylthienyldichlorosilane in the presence of an acceptor of chlorine hydride-pyridine, dihydroxysiloxanes were obtained. Roentgenostructural analysis of 1,3-dihydroxy-1,3-dimethyl-1, 3-dithienylsiloxane has shown that both atoms of oxygen of the compound molecule participate in the formation of hydrogen bonds being the donors and the acceptors at the same time. Heterofunctional condensation of dichloro- and dihydroxysiloxanes led to the formation of six- and eight-membered organosiloxanes with one or two methylthienylsiloxy bonds in the cycle. Studies of biological activity of the synthesized compounds have shown that their bactericidal properties prevail over those of the known bactericide “Cineb.” Oligomethylthienyl(diphenyl)siloxane might be used as a basis for oil- and benzo-resistant lubricants, as to α,ω-diacetoxythienylmethylsiloxanes, they exert influence on the kinetics of vulcanization of rubber mixtures on the basis of carbon elastomers preventing thus their premature vulcanization.

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