Coupled hydrogenation of arenes and alkenes or dienes with cobalt phosphine complexes |
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| Authors: | F K Shmidt Y S Levkovskii V V Saraev N M Ryutina O L Kosinskii and T I Bakunina |
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| Institution: | (1) Zhdanov University, Irkutsk, USSR |
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| Abstract: | Coupled hydrogenation of arenes with alkenes and dienes proceeds under mild conditions in the presence of a phosphine-modified cobalt system as well as of H3CoP(C4H9)3]3. Benzene hydrogenation products are cyclohexene (up to 25%) and cyclohexane. By the ESR method, a Co(0) complex containing P(C4H9)3, an arene molecule and AlR3 as ligands has been identified in the catalytic system Al(C2H5)3+Co(C5H7O2)2+P(C4H9)3. The nature of the active complex and the possible mechanism of the coupled process are discussed.
                     ,    ,  H3CoP(C4H9)3]3   .    ( 25%) .    Al(C2H5)3+Co(C5H7O2)2+P(C4H9)3 Co(0),  P(C4H9)3, AlR3.   .
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