Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 1 (January 2005)

metal-organic compounds


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Acta Cryst. (2005). C61, m30-m33    [doi:10.1107/S0108270104029865]

Di-[bold mu]-sulfito-bis[(4,4'-dimethyl-2,2'-bipyridine)zinc(II)] dihydrate and poly[[aqua(1,10-phenanthroline)zinc(II)]-[bold mu]3-sulfito-zinc(II)-[bold mu]3-sulfito]

M. E. Díaz de Vivar, S. Baggio, J. C. Muñoz and R. Baggio

Abstract: Two different zinc sulfite compounds have been prepared through the decomposition of pyrosulfite-dithionite ions in aqueous solution, viz. a dimeric complex, di-[bold mu]-sulfito-[bold kappa]3O,O':O'';[bold kappa]3O:O',O''-bis[(4,4'-dimethyl-2,2'-bipyridine-[bold kappa]2N,N')zinc(II)] dihydrate, [Zn2(SO3)2(C12H12N2)2]·2H2O, (I), which was solved and refined from a twinned sample, and an extended polymer, poly[[aqua(1,10-phenanthroline-[bold kappa]2N,N')zinc(II)]-[bold mu]3-sulfito-[bold kappa]2O:O':O''-zinc(II)-[bold mu]3-sulfito-[bold kappa]3O:O:O'], [Zn2(SO3)2(C12H10N2)(H2O)]n, (II). In (I), the dinuclear ZnII complex has a center of symmetry. The cation is five-coordinate in a square-pyramidal arrangement, the anion fulfilling a bridging chelating role. Compound (II) comprises two different zinc units, one being five-coordinate (square pyramidal) and the other four-coordinate (trigonal pyramidal), and two independent sulfite groups with different binding modes to the cationic centers.

Formula: [Zn2(SO3)2(C12H12N2)]·2H2O and [Zn2(SO3)2(C12H10N2)(H2O)]

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