metal-organic compounds
Both the [C(NH2)3]+ cations and the [Hg2Cl5]− anions of the title compound occupy special positions on two different twofold axes, one passing through the central Cl atom of the anion (along [100]), the other along a C—N bond of the cation (along [010]). The coordination polyhedron around the Hg atom can be described as a distorted octahedron of six Cl atoms, with two short [2.306 (5) and 2.322 (4) Å], two long [2.905 (7) and 2.906 (7) Å] and two very long [3.271 (6) and 3.344 (6) Å] Hg—Cl distances. In the crystal structure, there are alternate layers of cations and polyanions. Taking the very long Hg—Cl contacts into account, the polyanions are built of Hg2Cl5− units (which can be described as two HgCl2 fragments connected via a chlorine anion), interconnected through the common square-planar coordinated Cl atom. Two factors act to stabilize the structure of the crystal, i.e. the electrostatic interaction between the adjacent layers and the network of N—HCl hydrogen bonds.
Supporting information
Crystallographic Information File (CIF) | |
Structure factor file (CIF format) |
CCDC reference: 129334