Preparation and Reactions of Tantalum Alkylidene Complexes Containing Bulky Phenoxide or Thiolate Ligands. Controlling Ring-Opening Metathesis Polymerization Activity and Mechanism Through Choice of Anionic Ligand

1988 ◽  
Author(s):  
Kevin C. Wallace ◽  
Andy H. Liu ◽  
John C. Dewan ◽  
Richard R. Schrock
Keyword(s):  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Thiolate Ligands ◽  
Anionic Ligand ◽  
Alkylidene Complexes

N-Heterocyclic carbenes: application of ruthenium–alkylidene complexes in ring-opening metathesis polymerization

1999 ◽  
Vol 586 (2) ◽  
pp. 263-265 ◽  
Author(s):  
Ulrich Frenzel ◽  
Thomas Weskamp ◽  
Florian J. Kohl ◽  
Wolfgang C Schattenmann ◽  
Oskar Nuyken ◽  
...  
Keyword(s):  
Ring Opening ◽  
Heterocyclic Carbenes ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Alkylidene Complexes

Bis-mixed-carbene ruthenium-thiolate-alkylidene complexes: synthesis and olefin metathesis activity

2015 ◽  
Vol 44 (4) ◽  
pp. 1724-1733 ◽  
Author(s):  
Fatme Dahcheh ◽  
Douglas W. Stephan
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Vinyl Sulfides ◽  
Alkylidene Complexes

A series of bis-carbene Ru-hydride species were prepared and subsequently shown to react with aryl-vinyl-sulfides to give the corresponding biscarbene-alkylidene complexes. The activities of these species for ring-opening metathesis polymerization, ring-closing and cross-metathesis are reported. While these systems are shown to exhibit modest metathesis activities, the reactivity is enhanced in the presence of BCl3.

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