THE CRYSTAL-STRUCTURE OF BUTYLCHLOROBIS(8-QUINOLINATE)TIN(IV)

A single crystal X-ray diffraction study has shown that in butyl-chlor o-bis(8-quinolinate)tin(Iv) the coordination geometry around the tin a tom is distorted octahedral; two O atoms, a N atom of the cis-chelated 8-quinolinate ligands, and a chlorine atom are in equatorial sites. T he apical sites are occupied by the N atom of the other cis-chelate 8- quinolinate group and the butyl group. The apical groups form a C-Sn-N angle of 172.3(2)degrees. The two Sn-O distances are effectively equa l [2.054(4) Angstrom and 2.059(3) Angstrom], but the axial Sn-N bond [ 2.223(5) Angstrom] is slightly longer than the equatorial Sn-N bond [2 .201(4) Angstrom]. The Sn-Cl and Sn-C distances [2.429(2) Angstrom; 2. 073(6) Angstrom] are similar to those in related complexes.