Share this entry
carbonium ion Syllabification: car·bo·ni·um i·on
Pronunciation: /kärˌbōnēəm ˈīˌän/

Definition of carbonium ion in English:


An organic cation in which the positive charge is located on a carbon atom.
Example sentences
  • The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group.
  • This paper reviews the concept of carbonium ions, their formation, stability and reactions.
  • If a carbonium ion is involved in lysozyme catalysis then the TS structure will involve a planar, sp-hybridized C - 1.


Early 20th century: carbonium from carbo- 'carbon', on the pattern of ammonium.

Definition of carbonium ion in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources