Photochemical Reactions of Sodium Nitroprusside in Presence of Bicarbonate Ions

Abstract

Cyanide ligand (a strong ligand) present in sodium nitroprusside
is not so easily replaced chemically. An effort has been made to
replace this ligand by another anionic ligand like bicarbonate (a
weak ligand). The rate of this photochemical exchange reaction has
been observed spectrophotometrically. The effects of different
parameters like pH, light intensity, concentration of sodium
nitroprusside and bicarbonate ligand,concentration on the rate of
this substitution reaction have been studied. An effort was made to
isolate the product and characterize it. A tentative mechanism for
this photochemical substitution reaction has been proposed.