Some aliphatic diphosphonic tetrachlorides. Part II. Some reactions of diphosphonic tetrachlorides

Abstract

Aliphatic diphosphonic tetrachlorides and Grignard reagents containing aryl groups readily gave diphosphine dioxides, of which several are described. In a similar reaction of the tetrachlorides with Grignard reagents containing branched alkyl groups the products were not the expected diphosphine dioxides, but the products of mono-substitution at each phosphorus atom accompanied by a reduction. A similar result was obtained from reactions of such Grignard reagents with phosphonic dichlorides. Factors affecting the synthesis of diphosphonic tetrachlorides containing interphosphorus bridges of varying lengths were studied.