The red form of bis(1,10-phenanthroline)dithiocyanatoiron(II)
Abstract
The red compound of composition [Fe(phen)2(NCS)2]·nH2O (phen = 1,1 0-phenanthroline) obtained by the Schilt aqueous preparation has been reinvestigated. It is probably better formulated as [Fe(phen)3]2[Fe(NCS)4][NCS]2·3H2O. It readily loses water and isomerizes to the violet cis-[Fe(phen)2(NCS)2]. Mössbauer, i.r., and other data for the red compound supporting the above formulation are reported.