Poly[di-aqua-[μ-1,4-bis-(pyridin-3-ylmeth-yl)piperazine][μ-4-(2-carboxyl-atoeth-yl)benzoato]cobalt(II)].

A layered cobalt coordination polymer containing both 4-(2-carboxyl-atoeth-yl)benzoate (ceb) and 1,4-bis-(3-pyridyl-meth-yl)piperazine (3-bpmp) ligands, [Co(CHO)(CHN)(HO)] or [Co(ceb)(3-bpmp)(HO)] , was isolated and structurally characterized by single-crystal X-ray diffraction. Chain-like [Co(ceb)(HO)] units are oriented parallel to [101]. These are connected into (4,4)-grid coordination polymer layers by tethering 3-bpmp ligands.

Poly[[bis-[μ-3-(2-carboxyl-atophen-yl)propionato]{-[2-(pyridine-3-amido)-eth-yl]nicotinamide}-dicopper(II)] penta-hydrate].

In the title compound, {[Cu(CHO)(CHNO)]·5HO}, the Cu cations are coordinated in a square-pyramidal fashion, with four 3-(2-carb-oxy-phen-yl)propionate (cpp) carboxyl-ate O-atom donors in the basal plane, along with an N-atom donor from a -[2-(pyridin-3-yl-amino)-eth-yl]nicotinamide (pen) ligand in the apical position. [Cu(cpp)] coordination polymer layer motifs with embedded {Cu(OCO)} paddlewheel clusters are thereby constructed. These layer motifs are connected into a three-dimensional [Cu(cpp)(pen)] coordination polymer network by tethering pen ligands.

Poly[[(μ-aqua)[μ-4-(carboxyl-atometh-yl)ben-zo-ato]cobalt(II)] hemi[1,4-bis-(pyridin-4-ylmeth-yl)piper-azine] hemihydrate].

In the title com-pound, {[Co(CHO)(HO)]·0.5CHN·0.5HO}, two-di-men-sional coordination polymer slabs are held together in the three-dimensional crystal structure by means of O-H⋯N hydrogen bonding between bound water mol-ecules and pyridyl N atoms of cocrystallized 1,4-bis-(pyridin-4-yl-meth-yl)piperazine mol-ecules.

Poly[[[μ-1,4-bis-(pyridin-4-ylmeth-yl)piperazine][μ-4-(2-carboxyl-atoeth-yl)benzoato]copper(II)] monohydrate], a coordination polymer with twofold inter-penetrated cds topology networks.

The title compound, {[Cu(CHO)(CHN)]·HO}, contains square-planar coordinated Cu ions linked by 4-(carboxyl-atoeth-yl)benzoato (ceb) and 1,4-bis-(pyridin-4-ylmeth-yl)piperazine (bpmp) ligands into a tri-periodic coordination polymer with twofold inter-penetrating 68 topology. Positional crystallographic disorder among the copper atoms, the ethyl-carb-oxy group of the ceb ligands, and the water mol-ecules of crystallization exists in a refined 0.655 (6)/0.

Poly[[(μ-adamantane-1,3-di-acetato)[μ--(pyridin-3-yl)isonicotinamide]-nickel(II)] monohydrate], a layered coordination polymer with triangular (3,6) topology.

The title compound, {[Ni(CHO)(CHNO)]·HO}, contains octa-hedrally coordinated Ni ions ligated by 1,3-adamantanedi-acetato (ada) ligands and -(pyridin-3-yl)isonicotinamide (3-pina) ligands, to form coordination polymer layers with a triangular (3,6) grid topology based on [Ni(OCO)] dimeric units. The diperiodic layer motifs stack in an pattern mediated by C-H⋯O supra-molecular inter-actions between ada ligands and water mol-ecules of crystallization to form the full triperiodic crystal structure of the title compound.