Accession Number : AD0758476

Title :   Trimethylsilyl Esters of Phosphorus Acids. I. Preparation and Properties of Esters of Difluoro- and Bis(trifluoromethyl)phosphinic, -thiophosphinic, and -dithiophosphinic Acids,

Corporate Author : ALBERTA UNIV EDMONTON DEPT OF CHEMISTRY

Personal Author(s) : Cavell,R. G. ; Leary,R. D. ; Tomlinson,A. J.

Report Date : 20 APR 1972

Pagination or Media Count : 6

Abstract : Trimethylsilyl esters of difluorophosphinic, -thiophosphinic, and -dithiophosphinic acids and their bis(trifluoromethyl) analogs have been prepared by one or more of four different synthetic routes and characterized by infrared and nmr spectroscopy. Their reactions with anhydrous hydrogen chloride and thermal behavior have been investigated, the esters containing a P-S-Si bridge unit being markedly less thermally stable than those possessing the P-O-Si bridge. Dimethylamine reacts with the bis(trifluoromethyl) esters to give Me3SiNMe2 and dimethylammonium salts of the phosphinic acids, but in the case of the difluoro esters the initail product Me3SiNMe2 then attacks P-F bonds in the anions F2PEE'(-) (E,E' = O,S) yielding Me3SiF and the anions F(Me2N)PEE'(-). (Author)

Descriptors :   (*ORGANIC PHOSPHORUS COMPOUNDS, SYNTHESIS(CHEMISTRY)), (*SILANES, SYNTHESIS(CHEMISTRY)), SULFUR COMPOUNDS, AMINES, FLUORIDES, NUCLEAR MAGNETIC RESONANCE, INFRARED SPECTRA, CANADA

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE