Synthesis, Characterization and Crystal Structure of Complex { [ Cu ( hmtade) ] [ Ni ( dmit) 2 ]} 2 •4DMSO

A new complex { [ Cu(hmtade) ] [ Ni(dmit)(2)] }(2) center dot 4DMSO(1) (hmtade = 5,7,7,12,14,14-hexa-methyl- 1,4,8,11-tetraazacyclotetradeca-4, 11-diene, dmit = 4,5-dimercapto-1,3-dithiole-2-thione, DMSO = dimethyl sulfoxide) was synthesized and characterized by means of elemental analysis, Infrared, Ultraviolet-visible spectroscopy, and X-ray structure analysis. Complex 1 belongs to monoclinic system, space group P2(1)/n with a = 1.49952 (6) nm, b = 1.77229 (7) nm, c = 3.1275 (1) nm, beta = 102.442 (1)degrees, V = 8.1163 (5) nm(3), D-c = 1.558 Mg/m(3), Z = 8, F (000) = 3944, mu(Mo K alpha) = 1.637 mm(-1), S = 1.016, (Delta/sigma)(max) = 0.001, and final R-1 = 0.0673, wR(2) = 0.1672 [I > 2 sigma(I)]. Two independent structural units of [Cu(hmtade)] [ Ni ( dmit)(2)] are found in an asymmetric unit along with four DMSO solvent molecules. Sulfur-bridged heterometal Cu-Ni complex is formed by one dmit ligand of [ Cu ( hmtade)] [ Ni ( dmit) (2) ]. The copper( 11) ion is a five coordinated square pyramidal environment, with Cu-N distances in the region of 0.1949 (5)-0.2007 (4) nm and Cu-S distances of 0.28913 (18)-0.28952 (18) nm. The nickel ( II) ion which is coordinated by four sulfur atoms of two dmit ligands is in the distorted square geometry, and the Ni-S distances fall in the range of 0.21729 ( 16) -0.21905 (17) nm. The N-H center dot center dot center dot O hydrogen bonds are formed between the nitrogen atom of hmtade ligand and DMSO solvent molecule, and the dimmer is formed through intramolecular S center dot center dot center dot S and S center dot center dot center dot H short contacts. Finally, one-dimensional zigzag chain, two-dimensional and three-dimensional networks are formed via S center dot center dot center dot S, S center dot center dot center dot C or C center dot center dot center dot H short contacts.