Abstract: Twenty-four new addition complexes of type R′R″SnCl₂·2- HOC₆H₄ CH=NC₆H₄Rand R′R″SnCl₂·(2-HOC₆H₄CH=NC₆H₄R)₂ have been synthesized by the reactions of mixed diorganotin dichlorides, R′R″SnCl₂ (where R′= Et, Bu, Bz;R″=Ph;R′= Et, R″= Bu), with N-arylsalicylideneimines, 2- HOC₆H₄CH=NC₆ H₄ R(where R= H, 4- CH₃, 4- OCH₃, 3-CH₃, 4-OH).The complexes are non electrolyte in nitrobenzene.NMR (1 H, ¹³C), TG-DSCand XRDstudies indicate the ligands coordinate to Sn atom via phenolic Oatom rather than imide Natom, under different reaction conditions, the same organotin compound and the same Schiff base can form the complex to have different coordination number.

Key words: Mixed diorganotin dichloride, Schiff base complexes, Synthesis