Nitrenes nitrido

D-7 Nitrido and Nitrene (imido) Complexes Nitrido Species... 

Nitrido, imido, amino, thiocyanate, nitrilo, pyridine, dinitrogen, diazenido, hydrazido, diazene, nitrene, hydroxylamino Phosphine derivatives Arsine derivatives... 

The most prevalent complexes of this oxidation state are those which contain the [ReO] ", [Re02] and [RejOj] moieties, a reflection of the increasing stability of the rhenium-oxygen bond as the oxidation state increases. The tendency of Re to form multiple bonds (as in [Re=0] and [0=Re=0] ) is also seen in its behavior toward nitrogen, viz. the stabilization of the [Re=N] (nitrido) and [Re=NR] + (nitrene) moieties. With few exceptions, complexes of Re have been found to be essentially diamagnetic, i.e. to contain a spin-paired configuration. Because of the dominance of the [ReO] +, [Re02] and [RejOj] units in the chemistry of Re, such complexes will be considered first in the chemistry of this oxidation state. 

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