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l,l,7,7,tetrasiloxane.-To a solution of 0.390 g. (1.33 mmole.) of the tetrol in 40 ml. of ether was added 4.0 ml. (31.6 mmoles.) of trimethylchlorosilane and 2.0 ml. of pyridine. Work-up as above yielded 0.422 g. (57%) of distillate which mostly solidified to a waxy solid. Vapor phase chromatography showed this to be about 95% pure; a specimen collected by v.p.c. melted at 85-90°and had an infrared spectrum identical with that of a sample prepared by Simmler's2 procedure. This spectrum (in CS2) showed a very strong raSiOSi band near 1062 cm.-1 [probably a 1065 (s), 1052 (m) doublet] with a medium shoulder near 1105 cm.-1, but no bands of SiOH groups.

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