Bis[tris(pyridin-2-yl)methanol-kappa 2N,N ']palladium(II) dinitrate at 150 and 298 K

The title complex, [Pd{(py)3COH}2](NO 3)2, where (py)3COH is tris(pyridin-2-yl) methanol (C16H13N3O), studied at 150 and 298 K, has the potentially tridentate ligands present as bidentate ligands, with the Pd atom at a centre of symmetry. At 150 K, the Pd - N distances are 2.022 (3) and 2.026 (3) Å. The mean planes of the coordinated pyridine groups form dihedral angles of 42.1 (1) and 45.3 (1)° (at 150 K) with the coordination plane; the uncoordinated rings situated either side of the coordination plane form dihedral angles of 42.2 (1)° with it. The nitrate ions are regular and interact weakly with the hydroxyl group.