Reactions of Nitrate and Nitrite

The reactions of HNO3 and HNO2 with iron(III) cyanide complexes have been reported.Under conditions where [Fe2(CN)io] is the oxidant, the rate law is of the form R = kH [UN02f [NOsf [Fe2(CN) o l where Ho is an acidity function. The major reaction product is a mixed-valence Fe(II)/Fe(III) species incorporating NO as a ligand in the inner coordination sphere of the Fe(II). The rate data are similar to those for [FeCCNje] and [Fe(CN)4(LL)] complexes (LL = phen, bipy) and are consistent with a reaction proceeding via the formation of a NO2 radical species 

Kinetic data for the reaction of Cr(VI) with HNO2 have been interpreted in terms of a prior formation of a nitrito complex of Cr(VI), [Cr030N0] , which undergoes redox recomposition either in a unimolecular process or via reaction with a second mole of HNO2. The reaction of Pu(VI) with nitrous acid exhibits a rate law somewhat similar to that for the iron(III) cyano complexes. In this 

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