Aqueous solution, nitrogen fixation

Several approaches to models for nitrogen fixation in aqueous solution have also been developed which will not be considered these are based upon molybdenum1458 and vanadium.1459 1460... 

At least four vanadium(II) species have been identified in methano-lic aqueous solutions of VC12 and catechol (231). One is identified as Na2[V(C6H402)2] 2H20, and three contain three vanadium(II) ions on the basis of EPR evidence. One of the compounds is cyclic, and another, which binds dinitrogen, is open chain. This species reaches a maximum concentration when nitrogen fixation is fastest. These results modify the earlier picture to the sequence of reactions in Eq. (81). 

Derivation Oxidation of ammonia above 500C, decomposition of nitrous acid (aqueous solution). Also from atmospheric oxygen and nitrogen in the electric-arc process for fixation of nitrogen. 

Yokohata, A. and Tsuda, S., 1967. Silent discharge reactions in aqueous solutions. V. Nitrogen fixation in a heterogeneous system of nitrogen and water. Bull. Chem. Soc. Japan, 40 1339—1344. 

Figure 3.16 The 1 2 complex of C o with y-cyclodextrin that catalyses nitrogen fixation in an aqueous bisulfite solution irradiated under nitrogen at atmospheric pressure ...

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