Kinetics and mechanisms of homogeneous catalytic reactions. Part 8. Regioselective reduction of benzo[ b ]thiophene catalyzed by OsH(CO)(κ3-OCOCH3)(PPh3)2 |
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| Authors: | Merlín Rosales ángel Gonzálezóz Alicia Hernández Inés Pacheco and Yslamar Salazar |
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| Institution: | (1) Facultad Experimental de Ciencias. Departamento de Química, Laboratorio de Química Inorgánica, La Universidad del Zulia (L.U.Z.), Apdo. 526, Maracaibo, Venezuela |
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| Abstract: | The complex OsH(CO)(κ3-OCOCH3)(PPh3)2 (1) catalyzes the reduction of benzob]thiophene (BT) to 2,3-dihydrobenzob]thiophene (DHBT), under mild reaction conditions. A kinetic study lead to the rate law: r = K
1
K
2
k
3
/{1 + K
1
(1+K
2
)BT]}Os]BT]H2]. A catalytic cycle was proposed, which involves the oxidative addition of hydrogen as rate-determining step. |
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| Keywords: | Hydrogenation benzo[b]thiophene kinetics osmium carboxylate |
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