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A new series of diorganotin complexes of the type R 2 SnL (L 1 : N-(2-hydroxy-5-chlorophenyl

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IIIa) were prepared by the reaction of diphenyltin dichloride on the corresponding Schiff bases. The Schiff bases were the reaction products of 2-hydroxy-4-nitroaniline and appropriate salicylaldehydes. All the compounds were characterized by elemental analysis, 1 H-NMR, 13 C-NMR, IR and mass spectroscopy. Compound IIIa was also characterized by single crystal X-ray diffraction and shows a C 2 NO 2 coordination geometry nearly half-way between a trigonal bipyramidal and square pyramidal arrangement. In the solid state, π − π interactions exist between the aniline fragments of neighbouring molecules.