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artículo con referato
"Three New ZnII Sulfate Complexes"
M. Harvey, S. Baggio, A. Mombrú and R. Baggio
Acta Cryst. C 56(7) (2000) 771-774
The three zinc sulfate complexes presented herein display three completely different coordination modes, viz triaqua(1,10-phenanthroline-N,N′)(sulfato-O)zinc(II) hydrate, [Zn(SO4)(C12H8N2)(H2O)3]·H2O (octahedral, monomeric), bis(μ-sulfato-O:O′)bis[(2,9-dimethyl-1,10-phenanthroline-N,N′)zinc(II)], [Zn2(SO4)2(C14H12N2)2] (tetrahedral, dimeric), and catena-poly[[diaqua(2,2′-bipyridyl-N,N′)zinc(II)]-μ-(sulfato-O:O′)], [Zn(SO4)(C10H8N2)(H2O)2]n (octahedral, polymeric, twofold crystallographic symmetry). In the first, the sulfate is monodentate, while in the other two it acts as a bidentate bridge between two different Zn centers. There is a variety of sulfate S–O bond lengths, depending on the different coordination conditions and hydrogen-bonding interactions.
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