Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 8 (August 2008)

metal-organic compounds

 

A novel one-dimensional zinc coordination polymer containing 4-methylbenzoate and 4,4-bipyridine

D.-Y. Ma and G.-H. Deng

Abstract: The title compound, catena-poly[[tris(-4-methylbenzoato)-²O:O;⁴O:O'-(4-methylbenzoato-²O,O')dizinc(II)]--4,4'-bipyridine-²N:N'], [Zn₂(C₈H₇O₂)₄(C₁₀H₈N₂)]_n, is a novel coordination polymer. The asymmetric unit contains two unique Zn^II ions, four 4-methylbenzoate ligands and one 4,4'-bipyridine (4,4'-bpy) ligand, all in general positions. The four 4-methylbenzoate ligands link the two Zn^II centres to form a dinuclear unit, with a ZnZn separation of 3.188 (2) Å, which can be regarded as a supramolecular secondary building unit (SBU). These SBUs are further bridged by 4,4'-bpy ligands, forming a novel one-dimensional infinite chain. There are - stacking interactions between the benzene rings of the 4-methylbenzoate ligands and the pyridyl rings of the 4,4'-bpy ligands, leading to the formation of a corrugated layer. These layers are further assembled via C-HO hydrogen bonds into a three-dimensional supramolecular network structure. Coordination polymers such as the title compound are of interest for their potential applications as functional materials.

Formula: [Zn₂(C₈H₇O₂)₄(C₁₀H₈N₂)]

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