Synthesis and structural studies of dimethyltin(IV) 5-[(E)-2-(aryl)-1-diazenyl)quinolin-8-olates

Abstract

A series of cis-bis{5-[(E)-2-(aryl)-1-diazenyl]quinolin-8-olato}dimethyltin(IV), Me2Sn(L)2, and chloro-{5-[(E)-2-(aryl)-1-diazenyl]quinolin-8-olato}dimethyltin(IV), Me2SnCl(L), complexes have been synthesized by reacting the sodium salts of 5-[(E)-2-(aryl)-1-diazenyl)quinolin-8-ol (LH) and dimethyltin dichloride in 2:1 and 1:1 molar ratios, respectively. These complexes have been characterized by 1H, 13C, 119Sn NMR in solution and by IR and 119Sn Mössbauer spectroscopy in the solid state. The structures of two of the dimethyltin(IV) complexes, viz., Me2Sn(L2)2 (2) and Me2SnCl(L3). C7H8 (6) (L2 = 5-[(E)-2-(4′-methoxyphenyl)-1-diazenyl)quinolin-8-olate, L3 = 5-[(E)-2-(4′ ethoxyphenyl)- 1-diazenyl)quinolin-8-olate), were determined by single crystal X-ray diffraction. In general, the Me2Sn(L)2 complexes were found to adopt a distorted cis-octahedral arrangement, while Me2SnCl(L) complexes have a distorted trigonal bipyramidal coordination geometry around the tin atom in solution and in the solid state.