Tin-119, phosphorus-31, carbon-13 and proton nuclear magnetic resonance and Mössbauer studies of mono-, di- and tri-organotin(IV) dialkyldithiophosphates

Abstract

119Sn, 31P, 13C and 1H NMR chemical shifts of organotin(IV) dialkyldithiophosphates have been measured in CDCl 3. The 119Sn NMR chemical shifts and || 1 J( 119SnSn- 13C)|| and || 2 J( 119Sn- 1H)|| of triorganotin(IV) dialkyldithiophosphates are consistent with tetrahedral, four-coordinated tin, although Mössbauer studies indicate five-coordinated tin in the solid state. The 119Sn NMR chemical shifts, || 2 J( 119Sn- 1H)|| and Mössbauer parameters of mono- and di-organotin(IV) dialkyldithiophosphates are indicative of weak coordination of the ligands to tin.