Catalytic activity of supported tungsten and molybdenum complexes in olefin metathesis

1991 ◽  
Vol 65 (1-2) ◽  
pp. 187-192 ◽  
Author(s):  
P. Maksimowski ◽  
W. Skupinski
Keyword(s):  
Catalytic Activity ◽  
Olefin Metathesis ◽  
Molybdenum Complexes

scholarly journals Dinitrosylmolybdenum Complexes with Anion Ligands Coordinating by Oxygen Atoms. Synthesis, Electronic Structure and Olefin Metathesis Activity of Carboxylato-Dinitrosyl-Molybdenum Complexes

1992 ◽  
Vol 47 (10) ◽  
pp. 1469-1476 ◽  
Author(s):  
Antoni Keller ◽  
Ludmiła Szterenberg
Keyword(s):  
Electronic Structure ◽  
Catalytic Activity ◽  
Excited States ◽  
Olefin Metathesis ◽  
Spectroscopic Properties ◽  
Metathesis Reaction ◽  
Molybdenum Complexes ◽  
H Nmr ◽  
Spectroscopic Investigations ◽  
Oxygen Atoms

The new carboxylato-dinitrosyl-molybdenum complexes of the formula: [Mo(NO)2(O2CMe)2] • MeOH, Na2[Mo(NO)2(O2CMe)4] and Mo(NO)2(O2CPh)2 have been synthesized. Their structure was resolved on the basis of spectroscopic investigations (1H NMR, IR, UV-VIS). Catalytic activity of these complexes in olefin metathesis reaction was also examined.The electronic structure of dinitrosyl-molybdenum complexes with ligands coordinating by oxygen atoms was calculated for the example of the di- and tetra-acetato-dinitrosyl-molybdenum complexes using the Fenske-Hall and INDO methods. To interpret the spectroscopic properties (UV-VIS) within the method of interaction configuration, the electronic structure of the excited states was calculated.

Methylrhenium Oxides: Synthesis from R2O7 and Catalytic Activity in Olefin Metathesis

1988 ◽  
Vol 27 (3) ◽  
pp. 394-396 ◽  
Author(s):  
Wolfgang A. Herrmann ◽  
Josef G. Kuchler ◽  
Josef K. Felixberger ◽  
Eberhardt Herdtweck ◽  
Werner Wagner
Keyword(s):  
Catalytic Activity ◽  
Olefin Metathesis

scholarly journals Ammonium-tagged ruthenium-based catalysts for olefin metathesis in aqueous media under ultrasound and microwave irradiation

2019 ◽  
Vol 15 ◽  
pp. 160-166 ◽  
Author(s):  
Łukasz Gułajski ◽  
Andrzej Tracz ◽  
Katarzyna Urbaniak ◽  
Stefan J Czarnocki ◽  
Michał Bieniek ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Microwave Irradiation ◽  
Ultrasonic Irradiation ◽  
Olefin Metathesis ◽  
Aqueous Media ◽  
Environmentally Friendly ◽  
Counter Ion

The influence of microwave and ultrasonic irradiation on the performance of ammonium-tagged Ru-based catalysts in olefin metathesis transformations in aqueous media was studied. Differences in the catalytic activity in correlation with the nature of the present counter ion and the size of the N-heterocyclic carbene (NHC) ligand were revealed. The presented methodology allows for preparation of a variety of polar and non-polar metathesis products under environmentally friendly conditions.

How does the addition of steric hindrance to a typical N-heterocyclic carbene ligand affect catalytic activity in olefin metathesis?

2013 ◽  
Vol 42 (20) ◽  
pp. 7433 ◽  
Author(s):  
Albert Poater ◽  
Laura Falivene ◽  
César A. Urbina-Blanco ◽  
Simone Manzini ◽  
Steven P. Nolan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steric Hindrance ◽  
Olefin Metathesis

Ammonium NHC-tagged olefin metathesis catalysts – influence of counter-ions on catalytic activity

2018 ◽  
Vol 42 (11) ◽  
pp. 8609-8614 ◽  
Author(s):  
Andrzej Tracz ◽  
Anna Gawin ◽  
Michał Bieniek ◽  
Tomasz K. Olszewski ◽  
Krzysztof Skowerski
Keyword(s):  
Catalytic Activity ◽  
Quaternary Ammonium ◽  
Olefin Metathesis ◽  
Counter Ions ◽  
Metathesis Catalysts

Ruthenium-based catalysts bearing quaternary ammonium groups in their N-heterocyclic carbene (NHC) fragments and different counter-ions were synthesised and tested in various olefin metathesis transformations.

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