Carbonium ions carbocation classification

Carbocations are central to hydrocarbon chemistry (/). Much of this chemistry is based on acid catalysis, which leads to generation of positive ions of carbon. The resulting intermediates are classified as carbenium and carbonium ions, as proposed by Olah (2-4). Carbonium ions are the penta- or higher coordinate carbocations that maintain 8 valence electrons via 2-electron/3-center bonding, quite different from carbenium ions that possess only 6 valence electrons. Figure 1 shows a systematic classification of carbocations. 

In 1972 Olah proposed a classification for carbocations dividing them into trivalent ( classical ) carbenium ions and penta- and tetracoordinate ( non-classical ) carbonium ions. 

Figure 1. Classification of carbocations into carbonium and carbenium ions,...

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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