Poly[[[diaqua­zinc(II)]-bis(μ2-3-cyano-4-dicyano­methyl­ene-5-oxo-4,5-dihydro-1H-pyrrol-2-olato-κ2N3:N3′)] dihydrate]

Tafeenko, V.A.; Chernyshev, V.V.

doi:10.1107/S0108270105013399

Figure 2
Part of the crystal structure of (I)

, showing how the cations and anions are arranged to form a layer. The Zn atom at (x, y, z) and those with symmetry codes (i)–(iv) lie in the same plane. Infinite [Zn(C₈HN₄O₂)₂(H₂O)₂]_n chains are formed along the b axis via O3⋯H1—N1 hydrogen bonds. Adjacent chains are connected by coordination of an N3 atom from one chain to a Zn atom of another chain. In the layer, anions of adjacent chains form dimers via π–π interactions, e.g. the anion at (x, y, z) and its coordinated Zn^II cation form a dimer with the anion at symmetry position (viii), which is related to cation Znⁱⁱ. The Zn⋯Zn^i,ii,iii,iv distances are equal at 8.185 (1) Å. [Symmetry codes: (i) $[{\script{1\over 2}}]$ − x, − $[{\script{1\over 2}}]$ + y, $[{\script{1\over 2}}]$ − z; (ii) $[{\script{1\over 2}}]$ − x, − $[{\script{1\over 2}}]$ + y, − $[{\script{1\over 2}}]$ − z; (iii) $[{\script{1\over 2}}]$ − x, $[{\script{1\over 2}}]$ + y, − $[{\script{1\over 2}}]$ − z; (iv) $[{\script{1\over 2}}]$ − x, $[{\script{1\over 2}}]$ + y, $[{\script{1\over 2}}]$ − z; (v) $[{\script{1\over 2}}]$ − x, $[{\script{3\over 2}}]$ − y, −z; (vi) x, 1 − y, − $[{\script{1\over 2}}]$ + z; (vii) $[{\script{1\over 2}}]$ − x, $[{\script{1\over 2}}]$ + y, $[{\script{1\over 2}}]$ − z; (viii) $[{\script{1\over 2}}]$ − x, $[{\script{1\over 2}}]$ − y, −z; (ix) x, 1 + y, z.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 61| Part 6| May 2005| Pages m298-m300

doi:10.1107/S0108270105013399

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