carbocation


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carbocation

[¦kär·bō′kat‚ī·ən]
(organic chemistry)
A positively charged ion whose charge resides, at least in part, on a carbon atom or group of carbon atoms.
References in periodicals archive ?
Synthetic chemists explain to colleagues how to apply carbocation chemistry in organic synthesis.
Carbocations often quickly rearrange before proceeding with a reaction and some rearrangements are slower than others.
Finally, aniline reacts with the resulting carbocation via a regioselective nucleophilic substitution yielding DOPO-PHM.
22) Note that this account is not fully consistent with the idea of the true structure being a resonance hybrid, although it still is pragmatically useful for understanding the chemical properties of the allylic carbocation.
This result indicates that the reactivity of the carbocationic species generated during the polymerization process, which includes the initiating carbocations and chain propagating carbocations, were reactive enough to polymerize the vinylether groups of the VESFA, but not so reactive that they add to double bonds of the fatty acid portion of VESFA.
El C3 y el DIPE provienen de la reaccion de deshidratacion del 2-propanol, la cual se puede llevar a cabo por 2 mecanismos; un mecanismo tipo El que solo necesita la existencia de un sitio acido, y conduce a un carbocation, como compuesto intermedio, que se transforma luego en la olefina, y suele llevarse a cabo en sitios fuertes Lewis o Bronsted (Gervasini et al.
Its biosynthesis involves the reaction of 3-methyl-2-buten-1-ol pyrophosphate (7) to generate a transient allylic cation intermediate (8), which rapidly reacts with the electron-rich 3-methyl-3-buene-1-ol pyrophosphate (9) to form a carbon-carbon chemical bond and a second carbocation intermediate (10).
Protonation at the carbonyl oxygen of AA by acid catalyst: carbocation production;
Debido a la competencia que se establece entre las vias de reaccion del carbocation, por lo general, las sales de alquildazonio se descomponen para dar mezclas de productos y en consecuencia esta reaccion no tiene una gran utilidad sintetica.
Experimental and theoretical evaluation of energetics for nucleophilic solvent participation in the solvolysis of tertiary alkyl chlorides on the basis of gas phase bridgehead carbocation stabilities.
12) En vez del esperado compuesto de metatatesis, estilbeno, se obtuvo unicamente el producto de polimerizacion vinilica, poliestireno, lo cual es explicable dada la estabilidad del respectivo carbocation bencilico generado por el acido de Lewis.
A key aspect of this synthesis was the TMSOTf-mediated epoxide opening that proceeds trough a carbocation mechanism leading to the possibility of methyl migration and hydride shift side reactions.