Reactions diamagnetic metal alkyl complexes with

Fig, 22. Proposed mechanism for the reaction of diamagnetic metal alkyl complexes with NO(g). 

With diamagnetic alkyl complexes of the early transition metals, a very different reaction to that described in the previous section is observed. These compounds readily react with NO to give complexes of N-alkyl-N-nitrosohydroxylamine (anha) by the mechanism proposed in Fig. 22. 

It has been proposed that diamagnetic organo-transition metal complexes generally yield iV-alkyl-A -nitrosohydroxylaminates because the M-O-N-R radical couples rapidly with free NO to form the N—N bond. In contrast, low temperature NMR studies of reactions between NO and a paramagnetic Nb alkyl suggest the following reaction sequence ... 

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