Artículos de revistas
Hydrogenation and isomerization of 1-hexene with Ru-3(CO)(9)(PPh2CH2CH2Si(OMe)(3))(3) immobilized in silica matrices via the sol-gel method
Registro en:
Journal Of Molecular Catalysis A-chemical. Elsevier Science Bv, v. 185, n. 41671, n. 187, n. 194, 2002.
1381-1169
WOS:000176727900024
10.1016/S1381-1169(02)00022-5
Autor
Dallmann, K
Buffon, R
Institución
Resumen
Ru-3(CO)(9)(PPh3)(3) and Ru-3(CO)(9(P)Ph2CH2CH2Si(OMe)(3))(3) have been heterogenized in silica matrices by the sol-gel method. Gels prepared with Ru-3(CO)(9)(PPh2CH2CH2Si(OMe)(3))(3) were tested in the hydrogenation and isomerization of 1-hexene. At H-2-pressures of 16 psi in repeated runs (15h, 90degreesC) turnover numbers for 1-hexene hydrogenation were between 380 and 460. Isomerization products were trans-2-hexene, cis-2-hexene and trans-3-hexene. No cis-3-hexene, 2-methyl-1-pentene and 2-methylpentane were found. Leaching of ruthenium in each run was around 0.05% of ruthenium present in the original gel. UV-VIS and FT-IR spectra of the pure cluster compounds and the gels before and after the catalytic reactions showed that during the gel preparation some Ru-3 units remain intact, but are cleaved when the gel is heated under vacuum or used in catalytic hydrogenation reactions. (C) 2002 Elsevier Science B.V. All rights reserved. 185 41671 187 194