Acta Cryst. (2003). E59, m630-m632  [ doi:10.1107/S1600536803015496 ]

A pentanuclear complex exhibiting two short Ni-Cu distances

R. T. Stibrany, H. J. Schugar and J. A. Potenza

Abstract: Racemic crystals of the title species, (1S/R,2S'/R)-bis[(1S,2S)-trans-3,3'-(1,2-cyclohexanediyldinitrilo)bis(2-methylpropane-2-thiolato)]-1⁴N¹,N^1',S¹,S^1';2⁴N²,N^2',S²,S^2';3²S¹,S^2';4²S^1',S²;5²S^1',S^2'-trichloro-3Cl,4Cl,5Cl-tricopper(I)dinickel(II) bis(dimethylformamide) solvate, contain C-centered columns of chiral pentanuclear [Ni₂(C₁₄H₂₈N₂S₂)₂{Cu^ICl}₃] complexes (R,R and S,S) hydrogen bonded to dimethylformamide (C₃H₇NO) solvent molecules. Intercluster C-HCl hydrogen bonds link the complexes to form layers parallel to the ab plane. In each complex, three Cu^ICl groups bridge four S(thiolate) atoms of two Ni(C₁₄H₂₈N₂S₂) units, forming an Ni₂Cu₃S₄ core with the connectivity of the C atoms in bicyclo[3.3.1]nonane. Two of the Cu^I ions exhibit short contacts with Ni, suggesting weak Ni-Cu bonding. The complex molecule exhibits twofold site symmetry (site 4e in space group C2/c).

Online 24 July 2003

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