Abstract
Six diorganotin esters of Schiff-base ligands formulated as [R2SnLY]2, where L1 is C6H5CON2C(CH3)CO2 with Y = CH3CH2OH, R = mClC6H4CH2 (1), oFC6H4CH2 (2), pFC6H4CH2 (3) and L2 is 2-HOC6H4CON2C(CH3)CO2 with Y = CH3OH, R = oFC6H4CH2 (4), pFC6H4CH2 (5), mClC6H4CH2 (6) have been prepared and characterized by elemental analysis, IR, 1H and 119Sn NMR spectra. The crystal structures of complexes 1 and 4 have been determined by X-ray single crystal diffraction. The structure analyses reveal that the Sn atom in both 1 and 4 is seven-coordinate in distorted pentagonal bipyramid geometries with a planar SnO4N unit and two apical aryl carbon atoms, thus forming a dimeric molecule, which sits on a crystallographic center of symmetry. Intramolecular or intradimeric hydrogen bonds contribute to the stability and compactness of the crystal structures.
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