Urbina-Blanco, Cesar A.; Bantreil, Xavier; Clavier, Herve; Slawin, Alexandra M. Z.; Nolan, Steven P. published the article 《Backbone tuning in indenylidene-ruthenium complexes bearing an unsaturated N-heterocyclic carbene》. Keywords: imidazolylidene ruthenium indenylidene complex preparation catalyst olefin RCM; crystal mol structure mesityl imidazolylidene ruthenium complex; N-heterocyclic carbene; Tolman electronic parameter; olefin metathesis; percent buried volume; ruthenium–indenylidene.They researched the compound: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate( cas:286014-53-7 ).Name: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:286014-53-7) here.
The steric and electronic influence of backbone substitution in IMes-based (IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene) N-heterocyclic carbenes (NHC) was probed by synthesizing the [RhCl(CO)2(NHC)] series of complexes to quantify exptl. the Tolman electronic parameter (electronic) and the percent buried volume (%Vbur, steric) parameters. The corresponding ruthenium-indenylidene complexes were also synthesized and tested in benchmark metathesis transformations to establish possible correlations between reactivity and NHC electronic and steric parameters.
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Reference:
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