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Inicio » Actividades I+D > Publicaciones 2005 > Di-μ-sulfito-bis[(4,4′-dimethyl-2,2′-bip...
artículo con referato
"Di-μ-sulfito-bis[(4,4′-dimethyl-2,2′-bipyridine)zinc(II)] dihydrate and poly[[aqua(1,10-phenanthroline)zinc(II)]-μ3-sulfito-zinc(II)-μ3-sulfito]"
M.E. Díaz de Vivar, S. Baggio, J.C. Muñoz and R.F. Baggio
Acta Cryst. C 61(1) (2005) m30-m33
Two different zinc sulfite compounds have been prepared through the decomposition of pyrosulfite-dithionite ions in aqueous solution, viz. a dimeric complex, di-μ-sulfito-κ3O,O′:O″;κ3O:O′,O″-bis[(4,4′-dimethyl-2,2′-bipyridine-κ2N,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-κ2N,N′)zinc(II)]-μ3-sulfito-κ2O:O′:O″-zinc(II)-μ3-sulfito-κ3O: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.
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