Two polymeric structures with a benzene-1,2,4,5-tetracarboxylate ligand acting in k2- and k4-bridging modes

catena-Poly[[tetraaquabis(1H-pyrazole-KN2)nickel(II)] [[diaquabis(1H-pyrazole-KN2)nickel(II)]-k-benzene-1,2,4,5-tetraca rboxylato-K2O1:O4] tetrahydrate], {[Ni(C3H4N2)2(H2O)4][Ni(C10H2O8)(C3H4N2)2(H2O)2].4H2O}n, (I), and poly[[(k4-benzene-1,2,4,5-tetracarboxylato-K4O1:O2:O4:O5)octakis( 1H-pyrazole-KN...

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Published in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2009-07, Vol.65 (7), p.m241-m245
Main Authors: Atria, Ana Maria, Corsini, Gino, Gonzalez, Lissette, Garland, Maria Teresa, Baggio, Ricardo
Format: Article
Language:English
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Summary:catena-Poly[[tetraaquabis(1H-pyrazole-KN2)nickel(II)] [[diaquabis(1H-pyrazole-KN2)nickel(II)]-k-benzene-1,2,4,5-tetraca rboxylato-K2O1:O4] tetrahydrate], {[Ni(C3H4N2)2(H2O)4][Ni(C10H2O8)(C3H4N2)2(H2O)2].4H2O}n, (I), and poly[[(k4-benzene-1,2,4,5-tetracarboxylato-K4O1:O2:O4:O5)octakis( 1H-pyrazole-KN2)dicobalt(II)] tetrahydrate], {[Co2(C10H2O8)(C3H4N2)8].4H2O}n, (II), are polymeric compounds crystallizing in the space group P < file name="ayc_em3027_mu1.gif" type="gif"/ > , with two independent metallic cations and one benzene-1,2,4,5-tetracarboxylate (btc) anion, each lying on symmetry centres. Individual coordination polyhedra are regular and the main differences are in the way the btc anion binds [k2 in (I) and k4 in (II)], promoting a `chain-like' one-dimensional structure in (I) and a `sieve-like' two-dimensional motif in (II).
ISSN:0108-2701
DOI:10.1107/S0108270109019490