The crystal and molecular structure of ·(ClO4)2 has been determine d by X-ray crystallography. It crystallizes in the monoclinic, space group P21/ c, with lattice parameters a=0.63270(9)nm, b=2.4264(2)nm, c=1.2128(1)nm, β=92.7 21(9)°, V=1.8597(3)nm3, Z=4, Dc=1.835Mg·m-3, F(000)=1032, μ=1.591mm-1. The molecule is built up of centro-symmetric dimeric entities, in which the four-m embered Ag2S2 ring is planar and the angle of S(3)-Ag(1)-S(3A) is 107.70(2)°f or symmetry requirements. The silver atoms have slightly distorted tetrahedral c oordination environment, and the sulfur atoms of the ETU group occupy four coord ination sites. The two percholate anions in general position balance the charge. In the solid state, the title compound forms three dimensional network structur es through hydrogen bonds. The intermolecular hydrogen bonds and extensive inter molecular interaction connect the 2+ion and two ClO4-anions to cont ribute to the stability of the structure. CCDC: 208731.
RAJ S.Shanmuga Sundara FUN Hoong Kun (X ray Crystallography Unit, School of Physics, Universiti Sains Malaysia 11800 USM, Penang, Malaysia) The complex [Co(Im)6](Cin)2 (Im=imidazole,Cin=cinnamate) was prepared by reaction of Co(PhCHCHCOO)2 with imidazole in ethanol. It has been determined by single crystal X ray analyses. The crystals are triclinic, space group , with a=9.7601(3),b=10.5935(3),c=11.3269(2)? ,α =69.948(1),β =71.027(1),γ =62.803(1)° , and Z=1. The crystal structure of the title complex consists of monomeric [Co(Im)6]2＋ cations and cinnamate anions in which the cobalt? ion assumes a centrosymmetric octahedral geometry with the CoN6 chromophore. In the solid state, the complex forms a three dimensional network through N－ H… O hydrogen bonds, the intermolecular hydrogen bonds connect the [Co(Im)6]2＋ cations and cinnamate anions.The cinnamate anions are nearly planar.
The structure of [Cu2(Hdmg)4] (Hdmg=dimethylglyoxime anion) has been determined by X ray crystallography. It is monoclinic, space group P21/n, with Z=2. The lattice parameters: a=0.71601(14)nm; b=1.7044(3)nm; c=1.0126(4)nm; β =113.89(2)° ; Mr=587.52 (C16H28Cu2N8O8); V=1.1299(5)nm3. The copper atom lies in a distorted square pyramidal environment. The four equatorial donors are four nitrogen atoms from bidentate chelate dimethylglyoxime anion ligands. The oxygen atom from the dimethylglyoxime ligand acts as a bridging atom occupying the apical position of the symmetry related copper atom in the dimer structure. The two dimethylglyoximes bridge two copper atoms to form a six member Cu2O2N2 ring, respectively. The thermal gravity (TG) data indicate that the compound [Cu2(Hdmg)4] undergoes two exothermic reactions with loss of the organic ligand to give residue CuO. CCDC: 208729.
