Vanadium nitrogenase model chemistry

Synthetic structural models for clusters within the nitrogenase proteins or of the molybdenum or vanadium iron - sulphur cofactors isolated from them, are at an eaily stage of development and there are as yet no well - defined systems which model electron - transfer chemistry involving the binding and reduction of molecular nitrogen or other substrates dinitrogen binding to synthetic iron - sulphur clusters or heterometallic iron - sulphur clusters of any type has not been established structurally nor spectroscopically, [44- 46]. 

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