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

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 4
The anions of adjacent layers [e.g. an anion at (x, y, z) and an anion with symmetry code (iii)] are connected by π–π interactions to form stacks running normal to the bc plane. Hydrogen bonds between the apical (O3) and hydrate (O4) water molecules enhance the interaction. Some distances between atoms of adjacent layers are C9⋯C9ⁱⁱⁱ = 3.322 (4) Å, O1⋯C5ⁱⁱⁱ = 3.272 (3) Å, C2⋯C2ⁱⁱⁱ = 3.266 (3) Å and C5⋯O1ⁱⁱⁱ = 3.272 (3) Å. The hydrate molecules form hydrogen bonds with atoms O1 and N4 of the anions. The parameters of the hydrogen bonds are listed in Table 2

. The distance between Zn atoms in the direction normal to the bc plane (e.g. Zn⋯Znⁱⁱⁱ) is the shortest [7.445 (1) Å]. [Symmetry codes: (i) 1 − x, y, $[{1\over 2}]$ − z; (ii) $[{1\over 2}]$ − x, $[{1\over 2}]$ − y, −z; (iii) −x, y, $[{1\over 2}]$ − z; (iv) $[{1\over 2}]$ + x, $[{3\over 2}]$ − y, $[{1\over 2}]$ + z; (v) $[{1\over 2}]$ − x, $[{1\over 2}]$ + y, $[{1\over 2}]$ − z.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

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

doi:10.1107/S0108270105013399

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