Hyponitrite complexes, transition metal

At present it is impossible to say whether Fig. 24 represents the correct mechanism because no intermediates have been detected. A mechanism for the reaction of the hyponitrite complex (53) with free NO is shown in Fig. 25. This mechanism is related to the reaction of free NO with transition metal nitrosyl complexes discussed earlier though it cannot account for the stoichiometric reaction with CO. 

In the first category (category 1), the hyponitrite complex is prepared from reaction between a molecule bearing only one nitrogen and another without a nitrogen atom. Examples include metal-mediated reduction of NOx(227—232) or oxidation of hydroxylamine to hyponitrite (233). In these reactions, a transition metal complex plays a role in coupling two... 

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