Acta Crystallographica Section E

Structure Reports Online

Volume 59, Part 11 (November 2003)

metal-organic compounds

 

catena-Poly[[[tetraaquacobalt(II)]--pyrazine] phthalate]

S.-Y. Yang, L.-S. Long, R.-B. Huang, L.-S. Zheng and S. W. Ng

Abstract: The Co atom, the pyrazine heterocycle and the phthalate dianion are in special positions in the crystal structure of the title compound, [Co(C₄H₄N₂)(H₂O)₄](C₈H₄O₄); the Co atom and the N-heterocycle are located on sites of mmm symmetry, whereas the dianion is disordered over a 2mm site. The four water ligands constitute a square plane surrounding the Co atom, and the other two coordination sites are occupied by the N atoms of two different N-heterocycles. The cationic entity propagates as a linear -pyrazine-bridged chain that runs along the a axis of the orthorhombic unit cell. The dianion interacts with the Co atom through hydrogen bonds.

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