ORGANOTIN(IV) COMPLEXES WITH TRIDENTATE LIGAND-IV ORGANOTIN(IV) COMPLEXES WITH N-SALICYLIDENE-ACYLHYDRAZINES AND N-PYRIDOXYLIDENE-ACYLHYDRAZINES - CRYSTAL AND MOLECULAR-STRUCTURE OF MONOCHLORO-MONOMETHYL YLIDENE-P-METHOXYBENZOYLHYDRAZINATO)ONO(2)]TIN(IV) METHANOL

A series of mono- and dimethyltin(IV) complexes with N-salicylidene- a nd N-pyridoxylidene acylhydrazines have been prepared and characterize d by IR, UV-vis, H-1 NMR and mass spectral techniques. The X-ray cryst al structure of monochloro-monomethyl lidene-p-methoxybenzoylhydrazina to)ONO(-2)]tin(IV) methanol has been determined. In this complex the h ydrazone dianion acts as a tridentate ligand and the tin(IV) is six-co ordinated in a distorted octahedral geometry with the phenolic oxygen, azomethine nitrogen, amidate oxygen and methyl carbon occupying the e quatorial plane while the chloride and methanol oxygen lie in the axia l positions. The two molecules in the unit cell are connected by N-HO bonds. The structure of both mono- and dimethyltin(IV) complexes in di fferent solvents as well as the effect of solvents on the H-1 NMR spec tra of dimethyltin(IV) complexes are discussed. Copyright (C) 1996 Els evier Science Ltd