Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 3 (March 2008)

metal-organic compounds

 

Adducts of bis(acetylacetonato)zinc(II) with 1,10-phenanthroline and 2,2'-bipyridine

S. Brahma, H. P. Sachin, S. A. Shivashankar, T. Narasimhamurthy and R. S. Rathore

Abstract: In each of the zinc(II) complexes bis(acetylacetonato-²O,O')(1,10-phenanthroline-²N,N')zinc(II), [Zn(C₅H₇O₂)₂(C₁₂H₈N₂)], (I), and bis(acetylacetonato-²O,O')(2,2'-bipyridine-²N,N')zinc(II), [Zn(C₅H₇O₂)₂(C₁₀H₈N₂)], (II), the metal center has a distorted octahedral coordination geometry. Compound (I) has crystallographically imposed twofold symmetry, with Z' = 0.5. The presence of a rigid phenanthroline group precludes intramolecular hydrogen bonding, whereas the rather flexible bipyridyl ligand is twisted to form an intramolecular C-HO interaction [the chelated bipyridyl ligand is nonplanar, with the pyridyl rings inclined at an angle of 13.4 (1)°]. The two metal complexes are linked by dissimilar C-HO interactions into one-dimensional chains. The present study demonstrates the distinct effects of two commonly used ligands, viz. 1,10-phenanthroline and 2,2'-bipyridine, on the structures of metal complexes and their assembly.

Formula: [Zn(C₅H₇O₂)₂(C₁₂H₈N₂)] and [Zn(C₅H₇O₂)₂(C₁₀H₈N₂)]

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