| Tartalom: |
http://pubs.acs.org/doi/abs/10.1021/om0300023 |
| Archívum: |
MTA Könyvtár |
| Gyűjtemény: |
Status = Published
Type = Article
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| Cím: |
A simple entry to (eta(5)-C5R5)chlorodioxomolybdenum(VI) complexes (R = H, CH3, CH2Ph) and their use as olefin epoxidation catalysts
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| Létrehozó: |
Abrantes, M.
Santos, A. M.
Mink, János
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| Dátum: |
2003
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| Téma: |
QD Chemistry / kémia
QD03 Inorganic chemistry / szervetlen kémia
QD04 Organic chemistry / szerves kémia
TK Electrical engineering. Electronics Nuclear engineering / elektrotechnika, elektronika, atomtechnika
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| Tartalmi leírás: |
The complexes (eta(5)-C5R5)MoO2Cl (R = H, CH3 (Me), CH2Ph (Bz)) are
readily prepared from the parent carbonyls (eta(5)-C5R5)Mo(CO)(3)Cl
upon reaction with t-BuOOH (TBHP) in n-decane. The compounds are
characterized by vibrational spectroscopy, H-1, C-13, and Mo-95 NMR
spectroscopy, and elementary analysis and are compared to their
(eta(5)-C5R5)ReO3 homologues. The Mo-C5R5 force constants have been
determined. (eta(5)-C(5)Bz(5))MoO2Cl can be stored and handled at room
temperature without decomposition, in contrast to the more temperature
sensitive Cp (R = H) and Cp* (R = Me) analogues. The
(eta(5)-C5R5)MoO2Cl complexes catalyze the epoxidation of cyclooctene,
styrene, and I-octene with TBHP as oxidizing agent. The highest
activity is found for (eta(5)-C(5)Bz(5))MoO2Cl: TOF 21000 mol/(mol x h)
for cyclooctene in CH2Cl2 at 55 degreesC with a ratio
catalyst:substrate:TBHP = 0.0001:1:2.5. This activity even surpasses
that of the well-known MeReO3/H2O2 system. The stable parent carbonyls
(eta(5)- C5R5)Mo(CO)(3)Cl can be used as catalyst precursors since they
are transformed into (eta(5)-C5R5)MoO2Cl under the operating catalytic
conditions.
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| Típus: |
Article
PeerReviewed
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| Formátum: |
text
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| Azonosító: |
Abrantes, M. and Santos, A. M. and Mink, János (2003) A simple entry to (eta(5)-C5R5)chlorodioxomolybdenum(VI) complexes (R = H, CH3, CH2Ph) and their use as olefin epoxidation catalysts. ORGANOMETALLICS, 22 (10). pp. 2112-2118. ISSN 0276-7333
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