Carbonyl groups photocatalytic

Photocatalytic hydrogenation of carbonyl groups under visible light... 

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... 

The role of transition-metal carbonyls and particularly those of the Group 6 metals in homogeneous photocatalytic and catalytic processes is a matter of considerable interest [1]. UV irradiation especially provides a simple and convenient method for generation of thermally active co-ordinately unsaturated catalyst for alkenes or alkynes transformation. By using tungsten and molybdenum carbonyl compounds as catalysts, alkenes and alkynes can be metathesized, isomerised and polymerized. Photocatalytic isomerization of alkenes in the presence of molybdenum hexacarbonyl was observed by Wringhton thirty years ago [2]. Carbonyl complexes of molybdenum catalyze not only... 

During preparation of a photocatalytic membrane by the dip coating method a membrane is dipped in a 1102 suspension in water (Kim et al., 2003 Kim and Van der Bruggen, 2010 Kwak et al., 2001 Madaeni and Ghaemi, 2007), alcohol, for example, 2-propanol (Vankelecom, 2002) or other liquids. The membrane after dipping could be additionally pressurized with a compressed gas (Bae and Tak, 2005). The photocatalyst particles are self-assembled on a polymeric membrane due to a coordination of the functional groups present on the membrane surface (e.g., carbonyl or... 

The carbonylation of hydrocarbons serves as an important catalytic methodology both for extending the carbon backbones of organic compounds and for adding oxygen functional groups such as alcohols, aldehydes or carboxylic acids. Hydroformylation of alkenes (eq. 23) is carried out in various thermal catalysis schemes [87] and photocatalytic examples have been described (see below) [88,89],... 

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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