Structure of Amino Copper(II) Chloromercurates(II) [Cu(S-HLys)_2]Hg_3Cl_8 centre dot 2H_2O, [Cu_2Cl_2(HTren)_2]Hg_3Cl_(10) centre dot 4H_2O, [Cu(En)_2]Hg_3Cl_8, and [Cu(En)_2]Hg_2Cl_6

摘要

The crystal structures of [Cu_2Cl_2(HTren)_2]Hg_3Cl_(10) centre dot 4H_2O (I), [Cu(S-HLys)_2]Hg_3Cl_8 centre dot 2H_2O (II), [Cu(En)_2]Bg_3Cl_8 (III), and [Cu(En)_2]Hg_2Cl_6 (IV) (En is ethylenediamine, Tren is tris(2-aminoethyl)amine, HLys is S-lysine) were determined. The crystals of I contain binuclear cations in which the Cu atoms coordinated by tridentate protonated ligands HTren are bridged by chlorine atoms. In the discrete centrosymmetric (Hg_2Cl_(10))~(4-) anion, the central linear quasi-molecule HgCl_2 and two peripheral equivalent tetrahedral groups (HgCl_4)~(2-) can be discerned. The anionic part of the crystals of II consists of HgCl_2 quasi-molecules and bis(tet-rahedral) ions (Hg_2Cl_6)~(2-) combined into chains by a weak Hg-Cl interaction. The chains are linked by square tans-[Cu(HLys)_2]~(2+) moieties-the Hg atoms of the HgCl_2 molecules interact with two O atoms and the Cl atoms of the (Hg_2Cl_6)~(2-) ions interact with the Cu atoms-to form layers. The crystals of III consist of [(Hg_6Cl_(16)~(4-)]_nlayers (all the atoms are nonequivalent) and three types of [Cu(En)_2]~(2+) complexes, which combine the layers through Cu-Cl interaction to form a framework. The crystals of IV are composed of [(HgCl_3)~-]_n chains with one terminal Cl atom and two bridging Cl atoms between Hg atoms. The terminal Cl atoms interact with the Cu atoms of neighboring square-planar [Cu(En)_2]~(2+) complexes to form the layered structure IV.