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Bond order

In chemistry, bond order is a formal measure of the multiplicity of a covalent bond between two atoms. As introduced by Gerhard Herzberg,[1] building off of work by R. S. Mulliken and Friedrich Hund, bond order is defined as the difference between the numbers of electron pairs in bonding and antibonding molecular orbitals.

Bond order gives a rough indication of the stability of a bond. Isoelectronic species have the same bond order.[2]

  1. ^ Herzberg, Gerhard (1929) "Zum Aufbau der zweiatomigen Moleküle" Zeitschrift für Physik 57: 601-630
  2. ^ Dr. S.P. Jauhar. Modern's abc Chemistry.

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