Bis[μ-2-(2-carboxylatophenyl)acetato]-κ3O1,O1′:O2;κ3O2:O1,O1′-bis[aqua(1,10-phenanthroline-κ2N,N′)nickel(II)]

The title compound, [Ni2(C9H6O4)2(C12H8N2)2(H2O)2], is isostructural with the ZnII analogue. Each NiII atom is coordinated in a distorted octahedral geometry by three O atoms from two homophthalate anions, one aqua O atom and two 1,10-phenanthroline N atoms. The two NiII atoms are linked by two bridging homophthalate dianions into a centrosymmetric dinuclear unit. The dinuclear units are linked into one-dimensional ladder-like chains along [100] by O—H...O hydrogen bonds between the coordinated water molecules and one of the O atoms of the carboxylatomethyl group