Bis[tris(pyridin-2-yl)methanol-kappa2N,N']palladium(II) dinitrate at 150 and 298 K

The title complex, [Pd[(py)3COH]2](NO3)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) A. The mean planes of the coordinated pyridine groups form dihedral angles of 42.1 (1) and 45.3 (1) degrees (at 150 K) with the coordination plane; the uncoordinated rings situated either side of the coordination plane form dihedral angles of 42.2 (1) degrees with it. The nitrate ions are regular and interact weakly with the hydroxyl group.