Bis(1,10-phenanthroline-κN,N')(sulfato-κO,O')zinc(II) propane-1,3-diol solvate.

In the title compound, [Zn(SO(4))(C(12)H(8)N(2))(2)]·C(3)H(8)O(2), the Zn(2+) ion (site symmetry 2) is coordinated by two chelating 1,10-phenanthroline ligands and an O,O'-bidentate sulfate ion (S site symmetry 2), resulting in a distorted cis-ZnO(2)N(4) octa-hedral geometry for the metal ion. The complete propane-1,3-diol mol-ecule is generated by crystallographic twofold symmetry and two O-H⋯O hydrogen bonds are formed with the uncoordinated O atoms of the sulfate group.

Bis(2,2'-bipyridyl-κN,N')(sulfato-κO,O')cobalt(II) ethane-1,2-diol monosolvate.

The title compound, [Co(SO(4))(C(10)H(8)N(2))(2)]·C(2)H(6)O(2), has the Co(2+) ion in a distorted octa-hedral CoN(4)O(2) coordination geometry. A twofold rotation axis passes through the Co and S atoms, and through the mid-point of the C-C bond of the ethane-diol mol-ecule. In the crystal, the [CoSO(4)(C(10)H(8)N(2))(2)] and C(2)H(6)O(2) units are held together by a pair of O-H⋯O hydrogen bonds.

Bis(1,10-phenanthroline-κN,N')(sulfato-κO,O')nickel(II) ethane-1,2-diol solvate.

In the title compound, [Ni(SO(4))(C(12)H(8)N(2))(2)]·C(2)H(6)O(2), the coordination polyhedron around the Ni(2+) ion is a distorted octahedron, with four N atoms from two phenanthroline groups and two O atoms from a bidentate sulfate ligand. The Ni(2+) ion lies on a special position of site symmetry 2. Inter-molecular O-H⋯O hydrogen bonds help to stabilize the structure.