Complexation of SnCl4 with benzaldehyde 2-R-benzoyl-(R-HBb) and 3-R-2-naphthoylhydrazones (R = H, OH): The structure of [SnCl4(2-OH-HBb)] · CH3CN

Abstract

The reactions of tin tetrachloride with benzaldehyde 2-R-benzoyl and 3-R-2-naphthoylhydra zones (R-HBb and R-HLb, respectively) in acetonitrile and methanol have been studied. For R = H, the reactions lead to isolation of HBb and HLb, and for R = OH, the reactions give the SnCl4(2-OH-HBb)] · CH3CN (I) and [SnCl4(3-OH-HLb)] · 2CH3CN] (II) complexes. Their composition and structure have been determined by conductometry and electronic and IR spectroscopy. In both complexes, the ligands are biden tately coordinated in the ketone form (O(C=O), N(CH=N). Thermolysis of I and II is accompanied by removal of hydrogen chloride and volatile tin-containing species. The molecular and crystal structure of I has been determined by X-ray crystallography. The coordination polyhedron of the tin atom {SnCl4ON} is a distorted octahedron; in the crystal, the complex molecules are linked by an O–H···N(CH3CN) hydrogen bond and form stacks through stacking interactions between the phenyl substituents.