Dichlorobis(2-methylquinoline N-oxide-kappaO)zinc(II) from powder data.

The crystal structure of the title compound, [ZnCl(2)(C(10)H(9)NO)(2)], has been determined from laboratory powder diffraction data. Although the powder pattern was initially indexed with tetragonal unit-cell dimensions, the correct solution was found in an orthorhombic space group using a combination of grid-search and simulated-annealing techniques. The subsequent bond-restrained Rietveld refinement gave bond lengths and angles within expected ranges. The molecule has crystallographically imposed twofold symmetry.