Crystal structure of fac-tri­carbonyl­chlorido­bis­(4-hy­droxy­pyridine)­rhenium(I)–pyridin-4(1H)-one (1/1)

The asymmetric unit of the title compound, [ReCl(C(5)H(5)NO)(2)(CO)(3)]·C(5)H(5)NO, contains one mol­ecule of the complex fac-[ReCl(4-pyOH)(2)(CO)(3)] (where 4-pyOH represents 4-hy­droxy­pyridine) and one mol­ecule of pyridin-4(1H)-one (4-HpyO). In the mol­ecule of the complex, the Re atom is coordinated to two N atoms of the two 4-pyOH ligands, three carbonyl C atoms, in a facial configuration, and the Cl atom. The resulting geometry is slightly distorted octa­hedral. In the crystal structure, both fragments are associated by hydrogen bonds; two 4-HpyO mol­ecules bridge between two mol­ecules of the complex using the O=C group as acceptor for two different HO– groups of coordinated 4-pyOH from two neighbouring metal complexes. The resulting square arrangements are extented into infinite chains by hydrogen bonds involving the N—H groups of the 4-HpyO mol­ecule and the chloride ligands. The chains are further stabilized by π-stacking inter­actions.