A coordination polymer of Co II with 1,1'-(1,4-butanediyl)bis(imidazole)

In the title compound, catena-poly­[[[di­aqua­isonicotinatocobalt(II)]-di-μ-1,1′-(1,4-butane­diyl)­bis­(imidazole] tetrahydrate], {[Co(IN)2L(H2O)2]·4H2O}n, where L is 1,1′-(1,4-butane­diyl)­bis­(imidazole) (C10H14N4) and IN is the isonicotinate anion (C6H4NO2), the cobalt(II) cation, which is at an inversion center, is hexacoordinated by two water mol­ecules and four N atoms from two L ligands and two isonicotinate anions. Each ligand L coordinates to two cobalt(II) cations, acting as a bridge. The cobalt(II) cations are bridged to form an infinite zigzag chain structure along the c axis. The polymeric chains are linked through a variety of hydrogen bonds to form a three-dimensional structure.