Phosphine-substituted and phosphido-bridged metal clusters in homogeneous catalysis: IV. Selective hydrogenation of diphenylacetylene and isomerization of cis-stilbene in the presence of Ru3(CO)12−n (PPh2H)n (n = 2, 3), HRu3(CO)10(μ-PPh2), HRu3(CO)9(μ-PPh2) and HRu3(CO)7(μ-PPh2)3
作者： Mario Castiglioni , Roberto Giordano , Enrico Sappa
DOI: 10.1016/0022-328X(89)85191-5
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摘要: The clusters Ru3(CO)12−n(PPh2H)n (n = 2, 3), HRu3(CO)10(μ-PPh2), HRu3-(CO)9(μ-PPh2) and HRu3(CO)7(μ-PPh2)3 show considerable activity in the selective hydrogenation of diphenylacetylene to stilbenes; phosphine-substituted derivatives are also very efficient isomerization cis-stilbene trans-stilbene. latter product is often found as a precipitate vials after or experiments. Different cis/trans-stilbene ratios solutions have been for phosphido-bridged clusters; this points different reaction patterns and/or intermediates. A comparison behaviour C2Ph2, C2Et2 HC2But under same conditions presence cluster has made; nature alkyne an important influence on rate formation intermediates
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