Molybdenum dihydrogen

Characterization of oxygen-treated carbides of molybdenum and tungsten for /i-hexane-dihydrogen reactions... 

The evolution of dihydrogen on binding of dinitrogen has been attributed to the displacement of hydrides from a trihydridomolybdenum site (equation 85). If nitrogenase functions under an atmosphere of 50 50 D2 H2, then HD is produced. This is also consistent with a scheme involving molybdenum-bound hydrides (equation 86). 

Schrauzer has shown that compounds derived from molyb-denum(V)-cysteine derivatives also catalyze the reduction of dinitrogen. Subsidiary experiments confirm that the active species contain molybdenumdV) rather than molybdenum Ill), the latter tending to lead to the production of dihydrogen (279). Molybdenum isonitrile derivatives can also lead to dinitrogen-reduction catalysis (252). These systems are very difficult to analyze, and they often work best at low molybdenum concentrations (<10 3 M). The intermediates cannot be isolated or detected directly. Their nature must be inferred on the basis of circumstantial evidence, and this is sometimes difficult to interpret. 

MoOiP C Hm, Molybdenum, tricarbonyl-(dihydrogen)bis(tricyclohexylphos-phine)-, 27 3... 

MoNaC,H,2CjH, 0, Molybdate( 1 - ). tricarbonyl(Ti -cyclopenladienyl)-, sodium, compd. with 1,2-dimethoxy-ethane(l 2), 26 343 0)MoP.C Hm. Molybdenum, tricar-bonyl(dihydrogen)bis(tricyclohex-ylphosphine)-, 27 3... 

The first known r -dihydrogen complexes, so-called non-classical hydrido complexes, were the molybdenum and tungsten compounds, M(CO)3(PR3)2(ti -H2) (M = Mo, W R = /-Pr) isolated for the first time by Kubas [35]. In order for the... 

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