Synthesis and characterization of the first diorganotin(IV) complexes containing mixed arylazobenzoic acids and having skew trapezoidal bipyramidal geometry

摘要

Three dioraanotin(IV) complexes of the type, [R2Sn((LH)-H-a)((LH)-H-b)] (R = "Bu or Me and, (LH)-H-a and (LH)-H-b are two different 5-[(E)-2-(aryl)- 1-diazenvl]-2-hydroxybenzoate residues; a: aryl = 4'-Cl- (held constant) and b: aryl = 4'-Me or 4'-Br) have been prepared either by reacting "Bu2SnO, (LHH)-H-a' and (LHH)-H-b' (1:11) in anhydrous toluene or by reacting Me2SnCl2, (LHNa)-H-a and (LHNa)-H-b (1:1:1) in anhydrous methanol. The products were characterized by microanalysis, IR, NMR (H-1, C-13, Sn-119) and Sn-119 Mossbauer spectroscopy. A full characterization of the structures of the complexes ["Bu2Sn((LH)-H-a)((LH)-H-b)] (1 and 2) and [MeSn((LH)-H-b)((LH)-H-b)] (3) in the solid state were accomplished by single crystal X-ray crystallography. These complexes were found to adopt the usual dicarboxylato structural type with a skew-trapezoidal bipyramidal arrangement around the tin atom. (c) 2004 Elsevier B.V. All rights reserved.