Acta Cryst. (2009). E65, m744-m745  [ doi:10.1107/S1600536809019473 ]

Di--chlorido-bis[chlorido(N,N-dimethylethylenediamine-²N,N')zinc(II)]

M.-M. Yu, Q.-Z. Shi, Y.-N. Zhang and Z.-X. Li

Abstract: The centrosymmetric dinuclear title compound, [Zn₂Cl₄(C₄H₁₂N₂)₂], is isostructural with its previously reported Cu^II analogue [Phelps, Goodman & Hodgson (1976). Inorg. Chem. 15, 2266-2270]. In the title compound, each of the Zn^II ions is coordinated by two N atoms from a chelating N,N-dimethylethylenediamine ligand, two bridging Cl atoms and one terminal Cl atom. The coordination environment is distorted square-pyramidal. The Zn-Cl bond distances of the two bridging Cl atoms are distinctly different: the equatorial Cl atom exbibits a Zn-Cl distance of 2.318 (1) Å and the axial Cl atom exbibits a Zn-Cl distance of 2.747 (2) Å, which is significantly longer. The molecule can thus be seen as a dimer of two nearly square-planar monomeric units which are related to each other by an inversion center located in the middle of the dimer. Within one monomeric unit, the Zn atom, the two N atoms and the two Cl atoms are almost coplanar, with a mean deviation of only 0.05 (1) Å from the associated least-squares plane. The ZnZn distance within the dimer is 3.472 (3) Å. N-HCl and C-HCl hydrogen-bond interactions connect neighboring molecules with each other.

Online 6 June 2009

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