Monoclinic form of (cyanato-κN){2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato-κO,N,N',O'}manganese(III).

The title compound, [Mn(C(16)H(14)N(2)O(2))(NCO)], is a monoclinic polymorph of the previously published ortho-rhom-bic form [Lu et al. (2006 ▶). Inorg. Chem.45, 3538-3548]. The Mn(III) ion is chelated by a tetra-dentate Schiff base ligand and coordinated by the N atom of a cyanate ligand in a distorted square-pyramidal arrangement. In the crystal, there are short inter-molecular Mn⋯O(phenolate) distances of 2.752 (3) Å between pairs of inversion-related mol-ecules.