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electron-counting rules

Rules establishing correspondence between the topology of a molecular structure and the number of electrons which may be placed into its bonding molecular orbitals. In the origin of various electron-counting rules lies a general assumption that the completeness of the valence electron shell of a molecular entity belonging to a certain structural type serves as the major criterion of structural stability.
PAC, 1999, 71, 1919 (Glossary of terms used in theoretical organic chemistry) on page 1936
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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