carbonium ion

carbonium ion

[kahr-boh-nee-uhm]
noun
an organic ion containing a positively charged carbon atom (opposed to carbanion ).

Origin:
carbon + -ium

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carbonium ion (kɑːˈbəʊnɪəm)
 
n
chem Compare carbanion a positively charged organic ion in which most of the positive charge is localized on a carbon atom

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
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carbonium ion

any member of a class of organic molecules with positive charges localized at a carbon atom. Certain carbonium ions can be prepared in such a way that they are stable enough for study; more frequently they are only short-lived forms (intermediates) occurring during chemical reactions.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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