Trans-Tetrabromobis(3,5-dimethylpyridine)germanium(IV), a non-merohedral twin

Abstract

The structure of the title compound, [GeBr 4 (C 7 H 9 N) 2 ], is the first example of an addition compound of GeBr 4 with two aromatic nitrogen bases. The molecule, with D 2h symmetry, has crystallographic C 2h site symmetry. The environment around the Ge atom can be described as a slightly distorted octahedron with the dimethylpyridine ligands occupying axial positions and the four bromo ligands in the equatorial plane. The crystal structure is a non-merohedral twin composed of two overlapping monoclinic domains, simulating an orthorhombic symmetry.