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Statements

Subject Item
dbr:Carbene_radical
rdfs:label
Carbene radical
rdfs:comment
Carbene radicals are a special class of organometallic carbenes. The carbene radical can be formed by one-electron reduction of Fischer-type carbenes using an external reducing agent, or directly upon carbene formation at an open-shell transition metal complex (in particular low-spin cobalt(II) complexes) using diazo compounds and related carbene precursors.Cobalt(III)-carbene radicals have found catalytic applications in cyclopropanation reactions, as well as in a variety of other catalytic radical-type ring-closing reactions.
foaf:depiction
n4:Carbene_radical_H_bonding.png n4:Carbene_radical_bonding.png n4:Radical_type_reactions_carbene_radicals.png n4:Bonding_scheme_carbene_radical.png
dcterms:subject
dbc:Functional_groups dbc:Organic_compounds dbc:Carbenes dbc:Organometallic_chemistry
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49667015
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1084950850
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n4:Bonding_scheme_carbene_radical.png?width=300
dbo:abstract
Carbene radicals are a special class of organometallic carbenes. The carbene radical can be formed by one-electron reduction of Fischer-type carbenes using an external reducing agent, or directly upon carbene formation at an open-shell transition metal complex (in particular low-spin cobalt(II) complexes) using diazo compounds and related carbene precursors.Cobalt(III)-carbene radicals have found catalytic applications in cyclopropanation reactions, as well as in a variety of other catalytic radical-type ring-closing reactions. Theoretical calculations and EPR studies confirmed their radical-type behaviour and explained the bonding interactions underlying the stability of the carbene radical.Stable carbene radicals of other metals are known, but the catalytically relevant cobalt(III)-carbene radicals have thus far only been synthesized as long-lived reactive intermediates.
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wikipedia-en:Carbene_radical?oldid=1084950850&ns=0
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wikipedia-en:Carbene_radical