Reactivity of pyridinium poly(hydrogen fluoride) towards silicon tetrachloride, trichlorosilane and tris(amino)silanes

Radhamani, KN and Padma, DK (1993) Reactivity of pyridinium poly(hydrogen fluoride) towards silicon tetrachloride, trichlorosilane and tris(amino)silanes. In: Journal of Fluorine Chemistry, 64 (1-2). pp. 95-99.

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Abstract

The reaction of silicon tetrachloride (SiCl4), trichlorosilane (HSiCl3) and tris(amino)silanes[(R2N)3SiH] with pyridinium poly(hydrogen fluoride) (PPHF) gives rise to hexafluorosilicatesalts in good yields. They have been characterized as pyridinium hexafluorosilicate(C5H5NH)2SiF6 (in the case of SiCl4 and HSiCl3) and the corresponding dialkyl ammoniumhexafluorosilicate (R2NH2)2SiF6 salts [for tris(amino)silanes] (where R2N=pyrrolidino,piperidino, hexamethyleneimino, morpholino, N-methylpiperazino and diethylamino). Theinteresting features of these reactions are the cleavage of Si---Cl, Si---H and Si---N bondsat room temperature by PPHF and fluorination of the silicon moiety to a hexa-coordinateddoubly charged anionic species. These compounds have been characterized by NMR (1H,29Si, 19F) and IR spectroscopy, and by chemical analysis.

Item Type:	Journal Article
Publication:	Journal of Fluorine Chemistry
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	23 Feb 2011 12:43
Last Modified:	23 Feb 2011 12:43
URI:	http://eprints.iisc.ac.in/id/eprint/35726

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