Two polymeric structures with a benzene-1,2,4,5-tetracarboxylate ligand acting in μ2- and μ4-bridging modes

• Published in: Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2009-07, Vol.65 (7), p.m241-m245
• Main Authors: Atria, Ana María, Corsini, Gino, González, Lissette, Garland, Maria Teresa, Baggio, Ricardo
• Format: Article
• Language: English
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270109019490

catena‐Poly[[tetraaquabis(1H‐pyrazole‐κN2)nickel(II)] [[diaquabis(1H‐pyrazole‐κN2)nickel(II)]‐μ‐benzene‐1,2,4,5‐tetracarboxylato‐κ2O1:O4] tetrahydrate], {[Ni(C3H4N2)2(H2O)4][Ni(C10H2O8)(C3H4N2)2(H2O)2]·4H2O}n, (I), and poly[[(μ4‐benzene‐1,2,4,5‐tetracarboxylato‐κ4O1:O2:O4:O5)octakis(1H‐pyrazole‐κN2)dicobalt(II)] tetrahydrate], {[Co2(C10H2O8)(C3H4N2)8]·4H2O}n, (II), are polymeric compounds crystallizing in the space group P, 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 [μ2 in (I) and μ4 in (II)], promoting a `chain‐like' one‐dimensional structure in (I) and a `sieve‐like' two‐dimensional motif in (II).