Dialkyl and Alkylene Dithiophosphate of Selenium(IV) Derivatives

Abstract

Selenium tetrachloride reacts with O,O-dialkyl and alkylene dithiophosphoric acids in 1 : 4 molar ratio in refluxing benzene to yield Se[S₂P(OR)₂]₄, R = Et, Pr-n, i-Pr, i-Bu and Ph, and Se[S₂POGO]₄ where G = –CH₂CMe₂CH₂–, –CH₂CEt₂CH₂– and –CMe₂CMe₂–. The complexes are viscous liquids in open chain derivatives and red crystalline solids in cyclic derivatives, soluble in mixture solvents (DMSO and CHCl₃) and monomeric in nature. These have been characterized on the basis of elemental analysis, molecular weight determinations, IR and multinuclear NMR (¹H, ¹³C and ³¹P NMR).