Research Article: catena-Poly[[diaqua­nickel(II)]-bis­(μ-2-{[5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl]sulfan­yl}acetato)]

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Ru-Qin Gao, Chao-Hui Xia, Guo-Ting Li.


In the title compound, [Ni(C9H6N3O3S)2(H2O)2]n, the NiII atom, located on an inversion center, is ligated in an octa­hedral geometry by two carboxyl­ate O atoms from two 2-{[5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl]sulfan­yl}acetate (L) ligands and two O atoms from water mol­ecules in the equatorial plane, and two pyridine N atoms from other two L ligands at the apical sites. Two L ligands bridge pairs of metal atoms in an anti­parallel manner, forming centrosymmetric dinuclear quasi-recta­ngular units which are linked into infinite double-stranded chains parallel to [100]. O—H⋯O hydrogen bonds between the coordinating water mol­ecules and the carboxyl­ate groups of the L ligand as well as interchain S⋯N inter­actions [2.726 (2)–3.363 (2) Å] lead to the formation of a layer structure parallel to (001).

Partial Text

For coordination polymers of 1,3,4-oxadiazole-2-thione, see: Wu et al. (2010 ▶); Lundin et al. (2006 ▶); Wang et al. (2007) ▶. For coordination polymers of symmetric pyridyl-containing oxadiazole ligands, see: Ma et al. (2007 ▶); Du et al. (2006) ▶. For unsymmetric pyridyl-containing oxadiazole ligands, see: Wang & Li (2011 ▶).