Metal and organometal complexes of phosphorus oxy- and thio-acids III. O-Alkyl O'-triorganostannyl phosphonates

Article abstract of DOI:10.1016/0022-328X(88)80655-7

O-Alkyl O'-triorganostannyl phosphonates, R3SnOP(O)(H)OR' (R=Me, Buⁿ, Ph; R'=Me and Et) have been obtained in excellent yield by the reactions of sodium salts of O-alkyl phosphonic acids with triorganotin chlorides.The triphenyltin derivatives are insoluble, high melting, white crystalline solids, whereas the trialkyltin derivatives are colourless, non-volatil, thermally and hydrolytically stable, viscous liquids, miscible with common organic solvents.Their molecular weights are concentration- as well as solvent-dependent.The IR and 1H, 13C, 31P, and 119Sn NMR spectral data are consistent with a polymeric structure involving planar triorganotin groups linked by phosphonate bridges.The two axial Sn-O-P bonds become equivalent as a result of strong P=O->Sn coordination.Some reactions of the triorganostannyl alkyl phosphonates have also been studied.