Diacetonitriletetrakis{μ2-3-anilinocarbonyl-1-[(5-chloro-2-oxidophenyl)diazenyl]-2-naphtholato}tetraaquadiiron(III)disodium(I) dihydrate

Abstract

The title compound, [Fe2Na2(C23H14ClN3O3)4(C2H3N)2(H2O)4]·2H2O, is a hydrated Fe–azo complex dimer that is used as a charge-control agent in electrophotography. The molecule is a centrosymmetric dimer with two octahedral FeIII units linked by two bridging five-coordinate NaI cations. Each FeIII atom is chelated by the N and two O atoms from two 3-anilinocarbonyl-1-[(5-chloro-2-oxidophenyl)diazenyl]-2-naphtholate ligands. The Na+ cation is coordinated by a carbonyl O atom from the two ligands of each octahedral FeIII unit, two water molecules and the N atom of an acetonitrile molecule. Two solvent water molecules complete the structure. In the crystal structure, the dimeric molecules are bridged by a pair of discrete intermolecular O—H...O hydrogen bonds, one of which involves a sodium-bound water molecule and a hydrate water, and the other a 5-chlorophenolate O atom and a water molecule to form an extended chain along b.