Poly[[µ(2)-1,4-bis-(imidazol-1-ylmeth-yl)benzene]bis-(µ(4)-cyclo-hexane-1,4-dicarboxyl-ato)dicobalt(II)].

In the title compound, [Co(2)(C(8)H(10)O(4))(2)(C(14)H(14)N(4))](n), the two Co(II) atoms are both five-coordinated by four carboxyl-ate O atoms, derived from two different cyclo-hexane-1,4-dicarboxyl-ate (chdc) ligands, and an N atom, derived from one end of a 1,4-bis-(imidazol-1-ylmeth-yl)benzene mol-ecule (1,4-bix), in a distorted square-pyramidal environment. Each end of the chdc ligand links pairs of Co(II) atoms into a paddle-wheel assembly, i.e. Co(2)(O(2)CR')(4); these are connected into rows because of the bridging nature of the chdc ligands, and the rows are further connected into a two-dimensional layer through the 1,4-bix ligands. The 1,4-bix ligand, which is disposed about a centre of inversion, is disorderd. Two positions were discerned for the -CH(2)(C(6)H(4))CH(2)- residue, with the major component having a site-occupancy factor of 0.512 (9).

4,4'-azinodibenzoic Acid.

The title compound, C(14)H(10)N(2)O(4), shows crystallographic inversion symmetry and has one half-mol-ecule in the asymmetric unit. In the crystal, mol-ecules are linked into chains running along the cell diagonal by O-H⋯O hydrogen-bonding inter-actions.

Ethyl 6-amino-5-cyano-2-methyl-4-propyl-4H-pyran-3-carboxyl-ate.

The pyran ring of the title compound, C(13)H(18)N(2)O(3), is almost planar (r.m.s. deviation = 0.059 Å). The crystal packing is stabilized by N-H⋯O and N-H⋯N hydrogen bonds.