DIALKYL THIOPHOSPHONATE DERIVATIVES OF TRIORGANOTIN(IV)

Abstract

The reaction of triorganotin chlorides with sodium dialkyl thiophosphites proceeds to completion on refluxing the reactants in a 1:1 molar ratio for about ten hours. Similar reactions of triorganotin chloride with dialkyl thiophosphonate do not give comparable yields in the presence of triethylamine. The products formed are colorless volatile liquids having pungent odour, are miscible with common organic solvents and are found to be monomeric. Exposure of these compounds to atmospheric oxygen the thiophosphite [Sn-S-P] linkage was oxidized to a thiophosphate [Sn-O-P(S)] linkage. These complexes have been characterized by elemental analyses, molecular weight determination, IR, ¹H NMR and ³¹P NMR spectral data.

Key Words:

• Dialkyl thiophosphonate
• 2-thiono-1,3,2-dioxa-4,4′,6-trimethyl-phosphorinane
• triorganotin dialkyl thiophosphite