Crystal structure of bis{4-bromo-2-[(carbamimidamidoimino)methyl]phenolato-κ3N,N′,O}cobalt(III) nitrate dimethylformamide monosolvate

Abstract

The title compound, [Co(C8H8BrN4O)2]NO3·C3H7NO, is formed of discrete [CoL2]+cations, nitrate anions and dimethylformamide (DMF) molecules of crystallization. The cation has no crystallographically imposed symmetry. The ligand molecules are deprotonated at the phenol O atom and octahedrally coordinate the CoIIIatoms through the azomethine N and phenolate O atoms in amerconfiguration. The deprotonated ligand molecules adopt an almost planar conformation. In the crystal lattice, the cations are arranged in layers in theabplane divided by the nitrate anions and solvent molecules. No π–π stacking is observed. All of the amine H atoms are involved in hydrogen bonding to nitrate, DMF or ligand O atoms or to one of the Br atoms, forming two-dimensional networks parallel to (100).