The complex [Fe(phen)2(CN)2](phen = 1,10-phenanthroline) and its solutions

Abstract

The different coloured solutions and solid forms of [Fe(phen)₂(CN)₂](phen = 1,10-phenanthroline) contain only this species. The n.m.r. spectra of representative red and blue solutions, in methyl alcohol and dichloromethane, have been analysed and it is shown that the change in position of the charge-transfer absorption is associated with changes in the magnetic environment of the ligand protons, especially those close to the nitrogen trans to a CN group.