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'Metal Carbonyl' in keywords Facet   Publication Year 1975  [X]
Facet   section ZfN Section B:Volume 030  [X]
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1Author    M., S. W.Requires cookie*
 Title    Efficiency of Photosubstitution of Arenetricarbonylchromium(O) Complexes  
 Abstract    The quantum efficiency of the formation of (arene)Cr(CO)2(pyridine) (arene = benzene, mesitylene) is reported as a function of the irradiation wavelength of (arene)Cr(CO)3 and as a function of pyridine concentration. The quantum efficiency is independent of pyridine concentration in the range 0.008-0.17 M. The quantum efficiency is 0.72 ± 0.07 upon 313, 366, or 436 nm irradiation. The (arene)Cr(CO)3 complexes are found to quench triplet excited benzil at a diffusion controlled rate and the quenching is accompanied by reaction of the (arene)Cr(CO)3. The reaction product which presumably arises from CO release is the same as that obtained from direct irradiation of (arene)Cr(CO)3 in the presence of benzil. However, the triplet sensitized reaction occurs with a quantum efficiency of only 0.15 ± 0 .0 5 in contrast to the high substitution efficiency (0.72 ±0.07) of (arene)Cr(CO)3 upon direct irradiation. 
  Reference    (Z. Naturforsch. 30b, 254—258 [1975]; received May 10 1974) 
  Published    1975 
  Keywords    Photosubstitution, Metal Carbonyl, Energy Transfer, Photodissociation 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0254.pdf 
 Identifier    ZNB-1975-30b-0254 
 Volume    30