Photochemical substitution reactions involving nitrosylpentacyanoferrate(II) iodide system using cadmium sulphide as semiconductor

Abstract

Sodium nitroprusside contains cyanide ligands that are not easily replaced chemically. Studies on its substitution reaction with another anionic ligand `iodide’ are reported here. The rate of this photochemical reaction has been studied spectropho-tometrically. The effect of different parameters like pH, inten-sity of light, [sodium nitroprusside] and [iodide] ion on the reac-tion has also been studied. The product has been isolated and characterized by different analytical methods. A tentative mechanism for the photochemical substitution reaction is also proposed.