Nitrosyl complexes small molecule conversion

Reduction of metal-nitrosyl complexes is a prominent subject in the redox chemistry of small nitrogenated molecules, most relevant to biochemistry and to natural nitrogen-redox cycles.11 MnNO+ complexes have low-energy LUMOs and undergo facile one-electron reduction, usually showing reversible CV waves associated with MNO+/MNO redox couples.4"-6 The MNO 6 complexes yield fairly stable MNO 7 species in solution, as evident from UV-vis, IR, and EPR. Some of the latter species release NO in the minute time scale alternatively, the [Fe(CN)5NO]3 and [Ru(NH3)5NO]2+ ions may lose cyanide or ammonia.4"-6 Some metallopor-phyrins also afford reversible conversion between MNO1 / MNO forms.21 The NiR enzymes release NO after nitrite coordination and reduction.11... 

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