Carbochain polymers and copolymers-XVII. Polymerization of diallyl derivatives of silicon and germanium

Abstract

FOR some time past it has been found that polymers possessing high thermal stability, the ability to form films and which are soluble in organic solvents may be obtained from compounds containing isolated double bonds. 1,6-heptadiene, 1,5-hexadiene, 2,5-dimethyl-l,5-hexadiene [1] a,a'-dimethylenepimelic acid and its esters [2], diallyldiethylammonium bromide [3] are included in the number of such compounds. The polymerization of these compounds occurs either in the presence of initiators [2,3] or by the action of complex metal-alkyl catalysts [1]; as a result of polymerization polymers are formed which contain five-or six-membered rings in the primary chain [3]. We at tempted to extend the cyclic polymerization reaction to diallyl derivatives of silicon and germanium which may be considered as structural analogues of a 4,4-dialkyl-l,6-heptadiene. With this aim we synthesized diallyl20 20 1.4420 dimethylsilane (B.P. 136-137 °, n O 1.4420; literature data B.P. 136.8 °, n D [4]) diallyldiethylsilane (B.P. 79-80°/20 mm, n~ 1.4595; literature data B.P. 9[°/34 ram, n~ 1.4594 [4]) and diallyldimethyl germane (B.P. 146-147 °, ~' z(~,~D