Acta Cryst. (2009). E65, m797-m798  [ doi:10.1107/S1600536809022612 ]

Diaquabis(ethylenediamine-²N,N')copper(II) 2,2'-dithiodinicotinate sesquihydrate

T. K. Yazicilar, S. Demir, I. Uçar and C. Kazak

Abstract: In the title compound, [Cu(C₂H₈N₂)₂](C₁₂H₆N₂O₄S₂)·1.5H₂O, there are two half-molecules of the cationic complex in the asymmetric unit. The Cu²⁺ ions lie on inversion centres and are octahedrally coordinated by two ethylenediamine (en) and two aqua ligands in a typical Jahn-Teller distorted environment with the water O atoms in the axial positions. Two 2-mercaptonicotinate units (mnic) are linked by a disulfide bridge. All the ethylenediamine N-H and O-H groups form intermolecular hydrogen bonds with acceptor O and N atoms, giving rise to a three-dimensional network. One of the uncoordinated water molecules has a site occupation factor of 0.5.

Online 20 June 2009

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