Catalytic oxidation of diorganotin(IV) carboxylates to mixed-ligand monoalkyltin(IV) carboxylates by Ag+ and structure characterization of the mixed-ligand monoalkyltin(IV) 2-pyridinecarboxylate (2-ClPhCH2)Sn(2-ClPhCO2)(O2CC5H4N-2)2

The complexes of the type (ArCH2)2SnO were catalytic-oxygenated by Ag+ and yielded mixed-ligand organotin(IV) complexes (ArCH2)(2-C5H4NCO2)2(ArCOO)tin(IV) (Ar = C6H5 (1), 2-ClC6H4 (2), 2-CNC6H4 (3), 4-ClC6H4 (4), 4-CNC6H4 (5), 2-FC6H4 (6)). The complexes 1–6 are characterized by elemental analyses, IR and NMR (1H, 13C, 119Sn) spectroscopies. Single X-ray crystal structure analysis has been determined, which reveals that the center tin atom of complex 2 is seven-coordinated geometry.