Non-classical ion: Difference between revisions
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Revision as of 18:43, 17 February 2005
A hyper-coordinated carbonium ion (see Onium Ion) such as the penta-coordinated norbornyl cation named non-classical by S. Winstein. The term derives from a cornerstone of the classical theory of structural chemistry since the time of Kekul???????????? in the 1860s that stated that carbon could bind at most four other atoms (tetra-coordination). Tri-coordinated carbenium ions (see Enium Ion) are consequently termed 'Classical Ions'.
