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The title compound, [Co(C12H8N2)(H2O)4]2(C10H2O8), consists of discrete tetra­aqua­(1,10-phenanthroline)cobalt(II) cations and 1,2,4,5-benzene­tetra­carboxyl­ate anions. The CoII atom is octa­hedrally coordinated by two N atoms of the 1,10-phenanthroline ligand and four O atoms of water mol­ecules. The anion lies on an inversion centre. A two-dimensional hydrogen-bonding network is formed by O atoms of benzene­tetra­carboxyl­ate and the coordinated water mol­ecules. [ABSTRACT FROM AUTHOR]

A new one-dimensional coordination polymer, catena-poly­[[aqua­(nitrato-κ2 O,O′)copper(II)]-μ-pyrazine-2-carboxyl­ato- κ3 N1, O:N4], [Cu(C5H3N2O2)(NO3)(H2O)] n, has been synthesized and characterized. The coordination environment of the copper(II) ion is distorted octahedral, arising from an N, O-bidentate 2-pyrazine­carboxyl­ate ligand, an N atom from a symmetry-related 2-pyrazine­carboxyl­ate ligand, a bidentate nitrate group and a water mol­ecule. The chains interact by way of O—H⋯O hydrogen bonds and C—H⋯O interactions. [ABSTRACT FROM AUTHOR]

The coordination environment of copper(II) in the title compound, [Cu(C6H4NO3)(NO3)(C12H8N2)], is square pyramidal; the basal plane comprises the two N atoms of 1,10-phenanthroline and the two O atoms of picolinate N-oxide, with the apical position occupied by a nitrate O atom. [ABSTRACT FROM AUTHOR]