Publication Details (including relevant citation information):
Journal of the American Chemical Society (2006), 128(5), 1416-1417. Chiarella, Gina M.; Melgarejo, Doris Y.; Koch, Stephen A.
The reaction of Fe2+ with CN-, which was 1st performed in 1704, was used to synthesize basic [FeII,III(CN)4L2]n- complexes, where L is a monodentate ligand. Trans-Na2[FeII(CN)4(DMSO)2] and cis-[NEt4]2[FeII(CN)4(py)2] were synthesized by the direct reaction of FeCl2 with 4 equiv of CN- in DMSO or pyridine. Air oxidn. of the latter compd. gives cis-[NEt4][FeIII(CN)4(py)2]. The noncyanide ligands in these complexes undergo facile ligand exchange reactions with solvent. Reaction of cis-[NEt4]2[FeII(CN)4(py)2] with CO at room temp. gives trans-[NEt4]2[FeII(CN)4(py)(CO)].