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.
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(b) Stabilization of carbocation by resonance with the furan group.
Synthesis and Polymerization of Naphthoxazines Containing Furan Groups: An Approach to Novel Biobased and Flame-Resistant Thermosets
Synthetic chemists explain to colleagues how to apply carbocation chemistry in organic synthesis.
Carbocation Chemistry: Applications in Organic Synthesis
Water will suppress methyl radical or carbocation reactions by allowing for the protonation of these materials and preventing them from further reacting with other materials.
Examination of the reactions of R-40 with R-134a and POE refrigeration system materials
Many organic reactions, including industrially significant reactions in biomass processing and petroleum refining, involve chemical intermediates known as carbocations, which feature positively charged carbon atoms.
Unlocking the mystery of chain-branching mechanisms
(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.
Suggestions for thinking and talking about science and religion from the Soviet resonance controversy, a chemical counterpoint to Lysenkoism
Desde el punto de vista mecanistico la reaccion termica entre 100 y 200[grados]C procede de forma concertada a traves de un estado de transicion ciclico mientras que la reaccion catalizada por acido consiste de un mecanismo por etapas que involucra un carbocation como intermediario [49, 50].
Sintesis de nopol a partir de trementina: revision del estado del arte
Styrene oxide gave regioisomer II in agreement with more important electronic effect due to carbocation stabilization.
Bronsted Acidic Ionic Liquid 1-n-butylimidazolium tetrafluoroborate ([hbim]bf4): A Green Catalyst and Recyclable Medium for the Azidolysis of Epoxides
With this system, complexation of the Lewis acid coinitiator with the acetate group of IBEA dissociates the carbon-oxygen bond to produce a carbocation at the oxygen-stabilized secondary carbon atom of IBEA.
Coatings derived from novel, soybean oil-based polymers produced using carbocationic polymerization
High pHs associated with extended hang time also will suppress the rate of pigment stabilization through aldehyde bridging (mediated by the low pH carbocation form), instead promoting browning.
Creating conditions for graceful aging
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., 1995; 1997; De Miguel et al., 1996).
Efecto del potasio en catalizadores CoMo/[gamma]-[Al.sub.2][O.sub.3]-K(x) sobre el hidrotratamiento de naftas
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).
New silane coupling agents for NR/truck tire applications
* Protonation at the carbonyl oxygen of AA by acid catalyst: carbocation production;
Production of 4-hydroxybutyl acrylate and its reaction kinetics over Amberlyst 15 catalyst

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