The title complex, [MnBr0.50Cl0.50(C19H15N4O)(CO)3]Br0.49Cl0.51·CH3OH, exhibits substitutional disorder of the halogen ligand in the asymmetric unit, with almost the same occupancies for Br and Cl. The MnI atom is coordinated in a distorted octahedral environment by three carbonyl C atoms, the disordered X
− ligand (X = Br or Cl) and two N atoms from the 1,10-phenanthroline ligand bearing a nicotinamide pendant moiety. The cation displays a fac configuration of the carbonyl ligands. There is another disorder between the chloride ligand and its trans-situated carbonyl ligand, and between Cl− and Br− at the position of the counter-anion. In the crystal, intermolecular C—H...X, N—H...X, O—H...X (X = Br or Cl) and C—H...O hydrogen bonds lead to the formation of a three-dimensional network.
The crystal structures of two manganese(I) complexes with a different coordination mode of the supporting ligand are reported: fac-bromidotricarbonyl(4′-phenyl-2,2′:6′,2′′-terpyridine-κ2N,N′)manganese(I), [MnBr(C21H15N3)(CO)3], I, and cis-bromidodicarbonyl(4′-phenyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)manganese(I), [MnBr(C21H15N3)(CO)2], II. In both complexes, the manganese(I) atom is coordinated by terminal carbonyl ligands, a bromide ion, and a 4′-phenyl-2,2′:6′,2′′-terpyridine ligand within a distorted octahedral environment. In I, the metal ion is facially coordinated by three carbonyl ligands and the terpyridine ligand binds in a bidentate fashion. The non-coordinating nitrogen atom in the terpyridine ligand is positioned on the side opposite to the bromido ligand. In II, the metal ion is coordinated by two carbonyl ligands in a cis configuration and the terpyridine ligand binds in a tridentate fashion; notably, one carbonyl and the trans bromido ligand are mutually disordered over two positions. In I, the complex molecules are linked by C—H...Br hydrogen bonds. In II, aromatic π–π contacts are present, as well as pairs of C—H...Br and C—H...O hydrogen bonds.
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