RT info:eu-repo/semantics/article
T1 Dicyclopentadienyl-titanium and dicyclopentadienyl-zirconium complexes as catalysts for hydrogenation of olefins
A1 Cuenca Agreda, José Tomás
A1 Flores Serrano, Juan C.
A1 Royo Gracia, Pascual
K1 Ansa-metallocene derivatives
K1 Molecular-structure
K1 Crystal-structure
K1 Zirconocene derivatives
K1 Titanocene
K1 Hydride
K1 Alkyl
K1 Activation
K1 Ligands
K1 Bond
K1 Ciencia
K1 Química inorgánica
K1 Science
K1 Chemistry, inorganic
AB The catalytic hydrogenation of 1-hexene, 4-methyl-2-pentene (65% cis), cyclohexene, styrene, isoprene, 1,3-cyclooctadiene and 1,5-cyclooctadiene has been studied by using different metallocene-type complexes of stoichiometry [Cp2MX2], (M  Ti or Zr), containing equivalent, mixed ansa and bridging cyclopentadienyl ligands. The dichloro complexes (X  Cl) were reduced previously with an excess of magnesium, activated by the addition of a small amount of HgCl2, in the presence or absence of PMePh2. Cyclohexane solutions of the dialkyl derivatives (X Me, CH2SiMe3, CH2PPh2, CH2Ph, Ph, p-MeC6H4 or PPh2) were used in reactions generally carried out in dihydrogen at 7 bar pressure and 90°C, with a concentration of catalyst of around 10−3 M and an olefin-to-catalyst molar ratio of between 300 and 500. The isolation and structural characterization of the new complexes [Ti(η5-C5H5)(η5-C5Me5)Cl(CH2PPh2)], [Ti(η5- C5H5)(η5-C5Me5)(p-MeC6H4)]2], [Ti{μ2-η5-η5-(C5H4)2SiMe2}(CH2PPh2) 2] and [Ti(η5-C5Me5)(η5-C5H4CH2CH2PPh2)Cl2] are also reported.
PB Elsevier
SN 0022-328X
YR 1993
FD 1993
LK http://hdl.handle.net/10017/4605
UL http://hdl.handle.net/10017/4605
LA eng
NO We thank the Comisión  Interministerial  de  Ciencia y Tecnología (Project PB89-0208) for financial support and Repsol  Quimica for a Fellowship  to  J.C.F.
DS MINDS@UW
RD 26-abr-2024