Structural analysis of diorganotin(IV) complexes derived from thio bis-tridentate Schiff base ligands

Abstract Twelve dinuclear diorganotin(IV) complexes based on bis-tridentate Schiff bases and R 2 SnO (IV) oxides (R = Me, n -Bu, Ph) were synthetized by multicomponent reactions in moderate yields. The complexes were characterized by common spectroscopic techniques such as FT-IR, mass spectrometry and NMR ( 1 H, 13 C and 119 Sn) analysis. X-ray diffraction analysis was done for compounds 1c , 1d , 1f , 1j and 1l . 119 Sn NMR spectra showed signals at δ  = 135–145, 175–185 and 319–323 ppm for Me, n- Bu and Ph derivatives respectively, indicating the pentacoordinate geometry for tin atoms. In solid state, for methyl derivatives ( 1c , 1d ) a distorted octahedral geometry for tin atoms was observed owing the presence of Sn···O intermolecular interactions.