Tris(22′-bipyridine-κ2NN′)cobalt(III) tris­(oxalato-κ2O1O2)ferrate(III) mono­hydrate

摘要

The title compound, [Co(C10H8N2)3][Fe(C2O4)3]·H2O, con­sists of two discrete tris­(chelate) metal ions (Co^IIIN6 and Fe^IIIO6 chromophores) and a water mol­ecule. The structure is highly symmetrical; the Co^III and Fe^III ions occupy positions with site symmetry 3.2. The coordination polyhedra of the metal atoms have a nearly octa­hedral geometry with noticeable trigonal distortions. The Co—N and Fe—O bond lengths are equal by symmetry, viz. 1.981 (2) and 1.998 (4) Å, respectively. The cations and anions are arranged alternately along their threefold rotation axes parallel to [001], forming chains that are packed in a hexa­gonal manner. The water mol­ecules occupy voids between the chains. The crystal under investigation was an inversion twin.