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Chemistry LibreTexts

Carbenoid

[ "article:topic", "authorname:ggunawardena", "Carbenoid" ]
  • Page ID
    39207
  • A carbene (also known as a carbenoid) is a species that has a formally neutral carbon atom bearing two nonbonded valence electrons.  A carbene has the following general structural formula.

     

    R1 and R2 could be any ligand

    eg:

    A carbene could exist in two spin states: singlet carbene and triplet carbene.  In a singlet carbene, the two nonbonded valence electrons in the electron-deficient carbon are in the same orbital, i.e., they are a lone pair.

     

    In a triplet carbene, the two nonbonded valence electrons in the electron-deficient carbon are in different orbitals. Since a triplet carbene has unpaired electrons, it is, by definition, a radical.

     

    see also carbene equivalent, nitrene