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- Mesoionic_carbene abstract "Mesoionic carbenes (MICs) in chemistry are a type of reactive intermediate, related to carbenes and of some importance to scientific research. They are similar to N-heterocyclic carbenes (NHCs) except that canonical resonance structures with the carbene depicted cannot be drawn without adding additional charges. Mesoionic carbenes are also referred to as abnormal N-heterocyclic carbenes (aNHC) or remote N-heterocyclic carbenes (rNHC). A variety of free carbenes can be isolated and are stable at room temperature. Other free carbenes are not stable and are susceptible to intermolecular decomposition pathways. MICs do not dimerize according to Wanzlick equilibrium as do normal NHCs. This results in relaxed steric requirements for mesoionic carbenes as compared to NHCs. There are several mesoionic carbenes that cannot be generated as free compounds, but can be synthesized as a ligand in a transition metal complex. Most MIC transition metal complexes are less sensitive to air and moisture than phosphine or normal NHC complexes. They are also resistant to oxidation. The robust nature of MIC complexes is due to the ligand’s strong σ-donating ability. They are stronger σ-donors than phosphines, as well as normal N-heterocyclic carbenes due to decreased heteroatom stabilization. The strength of carbene ligands is attributed to the electropositive carbon center that forms strong bonds of a covalent nature with the metal. They have been shown to lower the frequency of CO stretching vibrations in metal complexes and exhibit large trans effects.".
- Mesoionic_carbene wikiPageID "35597206".
- Mesoionic_carbene wikiPageLength "15138".
- Mesoionic_carbene wikiPageOutDegree "32".
- Mesoionic_carbene wikiPageRevisionID "646724868".
- Mesoionic_carbene wikiPageWikiLink Carbene.
- Mesoionic_carbene wikiPageWikiLink Carbon–hydrogen_bond_activation.
- Mesoionic_carbene wikiPageWikiLink Category:Carbenes.
- Mesoionic_carbene wikiPageWikiLink Category:Organometallic_chemistry.
- Mesoionic_carbene wikiPageWikiLink Chemistry.
- Mesoionic_carbene wikiPageWikiLink Dithiolane.
- Mesoionic_carbene wikiPageWikiLink Green_chemistry.
- Mesoionic_carbene wikiPageWikiLink Heck_reaction.
- Mesoionic_carbene wikiPageWikiLink Hydrochloric_acid.
- Mesoionic_carbene wikiPageWikiLink Imidazole.
- Mesoionic_carbene wikiPageWikiLink Ion.
- Mesoionic_carbene wikiPageWikiLink Isoxazole.
- Mesoionic_carbene wikiPageWikiLink Metalation.
- Mesoionic_carbene wikiPageWikiLink Olefin_metathesis.
- Mesoionic_carbene wikiPageWikiLink Oxidative_addition.
- Mesoionic_carbene wikiPageWikiLink Persistent_carbene.
- Mesoionic_carbene wikiPageWikiLink Potassium_bis(trimethylsilyl)amide.
- Mesoionic_carbene wikiPageWikiLink Potassium_tert-butoxide.
- Mesoionic_carbene wikiPageWikiLink Pyrazole.
- Mesoionic_carbene wikiPageWikiLink Reactive_intermediate.
- Mesoionic_carbene wikiPageWikiLink Resonance_(chemistry).
- Mesoionic_carbene wikiPageWikiLink Ring-closing_metathesis.
- Mesoionic_carbene wikiPageWikiLink Ring-opening_metathesis_polymerisation.
- Mesoionic_carbene wikiPageWikiLink Suzuki_reaction.
- Mesoionic_carbene wikiPageWikiLink Tetrazole.
- Mesoionic_carbene wikiPageWikiLink Thiazole.
- Mesoionic_carbene wikiPageWikiLink Trans_effect.
- Mesoionic_carbene wikiPageWikiLink Transfer_hydrogenation.
- Mesoionic_carbene wikiPageWikiLink Transmetalation.
- Mesoionic_carbene wikiPageWikiLink Triazole.
- Mesoionic_carbene wikiPageWikiLink Trifluoroacetic_acid.
- Mesoionic_carbene wikiPageWikiLink Wanzlick_equilibrium.
- Mesoionic_carbene wikiPageWikiLinkText "Mesoionic carbene".
- Mesoionic_carbene wikiPageWikiLinkText "mesoionic carbene".
- Mesoionic_carbene wikiPageUsesTemplate Template:Reflist.
- Mesoionic_carbene subject Category:Carbenes.
- Mesoionic_carbene subject Category:Organometallic_chemistry.
- Mesoionic_carbene hypernym Type.
- Mesoionic_carbene type Redirect.
- Mesoionic_carbene comment "Mesoionic carbenes (MICs) in chemistry are a type of reactive intermediate, related to carbenes and of some importance to scientific research. They are similar to N-heterocyclic carbenes (NHCs) except that canonical resonance structures with the carbene depicted cannot be drawn without adding additional charges. Mesoionic carbenes are also referred to as abnormal N-heterocyclic carbenes (aNHC) or remote N-heterocyclic carbenes (rNHC).".
- Mesoionic_carbene label "Mesoionic carbene".
- Mesoionic_carbene sameAs Q6821510.
- Mesoionic_carbene sameAs m.0jkwn5b.
- Mesoionic_carbene sameAs Q6821510.
- Mesoionic_carbene wasDerivedFrom Mesoionic_carbene?oldid=646724868.
- Mesoionic_carbene isPrimaryTopicOf Mesoionic_carbene.