Carbonyl groups photocatalytic hydrogenation

The photocatalytic hydrogenation of alkenes and dienes by Group 6 metal carbonyls has been investigated in LNG solvents [15]. Photolysis of trans-[M(C0)4(C2H4)2] (M = Cr, Mo, W) in liquid xenon doped with H2 leads to formation of mer-[M(CO)3(C2H4)2(q -H2)] and ds-[M(CO)4(C2H4)(q -H2)]. The q -H2 complexes for M = Cr and Mo are much less stable than those for M = W. The evidence supported -coordination of H2 rather than oxidative addition to give dihy-... 

The mechanism of photocatalytic hydrogenation has been studied (by IR) with norbomadiene (nbd) and Group 6 metal carbonyls with respect of the role of H2... 

Photocatalytic hydrogenation of carbonyl groups under visible light... 

One of the most widely studied examples of photocatalysis by organometallic complexes is the photocatalytic hydrogenation of dienes by Group VI transition metal carbonyls M(CO>6 (M = Cr, Mo, W). One of the earliest discoveries was the finding that Cr(CO)6 is a good catalyst for the light-induced hydrogenation of 2,3-dimethylbutadiene and 1,3-cyclohexadiene to 2,3-dimethyl-2-butene and cyclohexene respectively ... 

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