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Chemistry LibreTexts

Concerted Reaction

[ "article:topic", "authorname:ggunawardena" ]
  • Page ID
    39369
  •  

    A concerted reaction is a reaction in which 1) # covalent bonds broken + #covalent bonds formed > 1, 2) # steps = 1.

    eg. 1:

     

     

    mechanism:  The reaction is a nucleophilic aliphatic substitution occurring via SN2 mechanism.

     

     

    # covalent bonds broken = 1
    # covalent bonds formed = 1
    # covalent bonds broken + # covalent bonds formed = 1 + 1 = 2
    # steps = 1

    Thus, the reaction is a concerted reaction.

    eg. 2:

     

     

    mechanism:  The reaction is an electrophilic addition.

     

     

    # covalent bonds broken = 2
    # covalent bonds formed = 2
    # covalent bonds broken + # covalent bonds formed = 2 + 2 = 4
    # steps = 1

    Thus, the reaction is a concerted reaction.

    see also pericyclic reaction