Synthesis and spectroscopic characterization of new adducts of diorganotin(IV) dichlorides with an asymmetric schiff base ligand

The novel schiff base adducts of tin(IV), [SnMe2Cl2(H2cdsalen)] and [SnPh2Cl2(H2cdsalen)2] have been synthesized by reaction of SnR2Cl2 (R=Me, Ph) with methyl 2-[2-(salicylideneamino)ethylamino]cyclopent-1-ene-1-dithiocarboxylate (H2cdsalen). The new products were characterized by elemental analysis, IR, 1H NMR and 119Sn NMR spectroscopies. Spectroscopic data suggest that in both complexes the ligand is coordinated through oxygen. The phenolic hydrogen within the free ligand was transferred to the imine nitrogen atom due to the coordination of oxygen with tin after the complex formation.