Investigation on steric effect in the coordination of S, N and O donor heterocycle to organotin(IV): Syntheses and crystal structures of triorganotin(IV) derivatives with 5-phenyl-1,3,4-oxadiazole-2-thiol

A series of organotin(IV) complexes with 5-phenyl-1,3,4-oxadiazole-2-thiol of the type R3Sn[S(C8H5N2O)] (R = Me 1, n-Bu 2, PhCH23, Cy 4, Ph 5) have been synthesized. Among them, the central tin atoms of complexes 1-5 are all five-coordinated with the distorted trigonal bipyramidal geometry. Interestingly, the complexes 1-4 exhibit 1D polymeric chains through Sn and N intermolecular interactions.