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Theoretical Aspects of Main Group Multiple Bonded Systems

  1. Ioan Silaghi-Dumitrescu1,
  2. Petronela Petrar1,
  3. Gabriela Nemeş1,
  4. R. Bruce King2

Published Online: 15 SEP 2009

DOI: 10.1002/0470862106.ia662

Encyclopedia of Inorganic Chemistry

Encyclopedia of Inorganic Chemistry

How to Cite

Silaghi-Dumitrescu, I., Petrar, P., Nemeş, G. and Bruce King, R. 2009. Theoretical Aspects of Main Group Multiple Bonded Systems. Encyclopedia of Inorganic Chemistry. .

Author Information

  1. 1

    Babeş-Bolyai University, Cluj-Napoca, Romania

  2. 2

    University of Georgia, Athens, GA, USA

Publication History

  1. Published Online: 15 SEP 2009


Computational data on homonuclear multiple bonding between elements of group 13 and heavier elements of group 14 are reviewed. For RnEERn, there is an increased tendency of bending the RER planes (n = 2) or the RE bonds (n = 1) toward the EE axis upon descending a group. This is related to the mixing of the valence σ–π orbitals reflecting the tendency of the heavier elements to retain nonbonding character for their ns2 orbital. As a result, the bond orders are also reduced and the EE interaction weakened.


  • group 13 double bonding;
  • group 13 triple bonding;
  • group 14 double bonding;
  • group 14 triple bonding