SYNTHESES AND PROPERTIES OF MIXED LIGAND COMPLEXES OF DIORGANOTIN(IV): PART I. β-DIKETONATO DIORGANOTIN DIALKYL (OR ARYL) DITHIOPHOSPHATES AND 1-β-DIKETONATO-3-DIALKYL DITHIOPHOSPHATO TETRABUTYL DISTANNOXANES

Abstract

The mixed ligand complexes of the type R₂′Sn[R″COCHCOR″] [S₂P(OR‴)₂] and [(R‴O)₂S₂P] R₂′SnOSn R₂′ [R″COCHCOR″] have been prepared by the reaction of diorganotin oxide (R′ = Bu, Ph) or chloride (R′ = Me) with β-diketones and dialkyl (or aryl) dithiophosphoric acids in 1:1:1 and 2:1:1 molar ratios is refluxing benzene. The products formed are monomeric, non volatile, yellow colored viscous liquids or sticky solids, soluble is common organic solvents and exhibit high sensitivity towards atmospheric moisture. These complexes have been characterized by elemental analyses, molecular weight measurements, IR and NMR (¹H, ³¹p and ¹¹⁹Sn) spectral data. On the basis of ¹¹⁹Sn NMR studies, it was postulated that there might be disproportionation which led to the formation of mixture with fast exchange between Sn—S and Sn—O linkages.

Key Words:

• Diorganotin oxide (or chloride)
• dialkyl (or aryl) dithiophosphate
• β-diketone
• β-diketonato diorganotin(IV) dialkyl (or aryl) dithiophosphate
• 1-β-diketonato-3-dialkyl dithiophosphato tetrabutyl distannoxanes