trans-Bis(methanol-κO)bis-(quinoline-2-carboxyl-ato- κ2 N,O)manganese(II)

Abstract

The title compound, [Mn(C10H6NO2)2(CH4O)2], was obtained unintentionally as the product of an attempt to synthesize a polynuclear carboxyl-ate bridged manganese(III/IV) complex, using methanol to reduce the permanganate ion. The mol-ecule is centrosymmetric; the pairs of equivalent ligands coordinate trans to each other in a distorted octa-hedral geometry. Intra-molecular C - H⋯O bonds lying in the equatorial plane stabilize the mol-ecule. In the crystal, mol-ecules are linked by O - H⋯O and C - H⋯O hydrogen bonds, creating a three-dimensional supra-molecular structure. π-π and C - H⋯π inter-actions are also observed. The dihedral angle and centroid-to-centroid distance between the pyridine ring (A) and the benzene ring (B i) of a symmetrically related mol-ecule [symmetry code: (i) -1 - x, -y, -z] are 1.27 (11)° and 3.974 (2) Å, respectively. For the C - H⋯π inter-actions, the relevant distances and angles are: C⋯Cg[A ii] = 3.643 (2) Å, H⋯Cg[A ii] = 2.750 (2) Å and C - H⋯Cg[A ii] = 155 (1)° [symmetry code: (ii) x, -1 + y, z].