carbonium ion


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Related to carbonium ion: carbanion

carbonium ion

[kär′bōn·ē·əm ‚ī·ən]
(organic chemistry)
A carbocation which has a positively charged carbon with a coordination number greater than 3.
References in periodicals archive ?
Formation of the 1'-hydroxyl metabolite is particularly important because it is thought to form a carbonium ion that results in a reactive intermediate molecule (Burkey et al.
This is particularly important because the 1'-hydroxy pathway is responsible for formation of the reactive carbonium ion. Furthermore, although there are very limited human health and no epidemiology data, no adverse human health effects have been associated with dietary consumption of methyl eugenol.
The cracking rate of alkenes is much higher than that of alkanes following the carbonium ion mechanism, therefore, catalytic pyrolysis of C4 hydrocarbons at low temperature mainly follows the carbonium ion mechanism.
For the cracking of hydrocarbons, the selectivity of ethene and ethane following the carbonium ion mechanism is generally lower than that following the free radical mechanism.
Increasing temperature could improve both of the diffusion velocity of carbonium ions (+C[H.sub.2]OH) into initial fibers and the reaction rate of carbonium ions (+C[H.sub.2]OH)/ surface fibers crosslinking reaction.
This rule allows carbonium ions of different structure to be distinguished between those that could create tumors in organisms and those that cannot (ref.