Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 5 (May 2007)

metal-organic compounds

 

Hydrogen-bonded supramolecule of N,N'-bis(4-pyridylmethyl)oxalamide and a zigzag chain structure of catena-poly[[[dichloridocobalt(II)]--N,N'-bis(4-pyridylmethyl)oxalamide-²N⁴:N^4'] hemihydrate]

G.-H. Lee and H.-T. Wang

Abstract: N,N'-Bis(4-pyridylmethyl)oxalamide, C₁₄H₁₄N₄O₂, exists as a dimer which is extended into a two-dimensional network with other dimers through pyridine-amide hydrogen bonds. The crystal structure of the title coordination polymer, {[CoCl₂(C₁₄H₁₄N₄O₂)]·0.5H₂O}_n, features a one-dimensional zigzag chain, in which the cobalt ion sits at a twofold symmetry position and adopts a tetrahedral geometry, and the bridging ligand lies on an inversion center and connects to Co^II ions in a bis-monodentate mode. Furthermore, two interwoven chains create a cavity of ca 8.6 × 8.6 Å, which produces a three-dimensional channel. Water molecules are held in the channel by hydrogen bonds.

Formula: C₁₄H₁₄N₄O₂ and [CoCl₂(C₁₄H₁₄N₄O₂)]·0.5H₂O

	Structure factor file (CIF format) (294.0 kbytes) [ doi:10.1107/S0108270107014527/av3082Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (113.0 kbytes) [ doi:10.1107/S0108270107014527/av3082IIsup3.hkl ] Contains datablock II

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