Iniciar sesión

Capítulo 6

Reacciones de sustitución nucleofílica y eliminación de haluros de alquilo

Haluros de alquilo
Haluros de alquilo
Structural Properties Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as ...
Recciones de sustitución nucleofílica
Recciones de sustitución nucleofílica
Historical perspective In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a ...
Nucleófilos
Nucleófilos
The word “nucleophile” has a Greek root and translates to nucleus-loving. Nucleophiles are either negatively charged or neutral species with a ...
Electrófilos
Electrófilos
This lesson explains the definition, classification, and characteristic features of an electrophile that are key features of nucleophilic substitution ...
Grupos salientes
Grupos salientes
The nature of leaving groups strongly influences the outcome of a nucleophilic substitution reaction. In general, in a nucleophilic substitution reaction, ...
Carbocationes
Carbocationes
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an ...
Reacción S<sub>N</sub>2: Cinética
Reacción SN2: Cinética
Kinetic Studies and Significance In a chemical reaction, a relationship exists between the concentration of reactants and the rate at which the reaction ...
Reacción S<sub>N</sub>2: Mecanismo
Reacción SN2: Mecanismo
The kinetic studies of SN2 reactions suggest an essential feature of its mechanism: it is a single-step process without intermediates. Here, both the ...
Reacción S<sub>N</sub>2: Estado de transición
Reacción SN2: Estado de transición
An SN2 reaction of an alkyl halide is a single-step process in which bond formation between the nucleophile and the substrate and bond breaking between ...
Reacción S<sub>N</sub>2: Estereoquímica
Reacción SN2: Estereoquímica
In an SN2 reaction, the nucleophilic attack on the substrate and departure of the leaving group occurs simultaneously through a transition state. As the ...
Reacción S<sub>N</sub>1: Cinética
Reacción SN1: Cinética
In an SN2 reaction, the reaction rate depends on both the type of nucleophile and the substrate. A hindered tertiary alkyl halide is practically inert to ...
Reacción S<sub>N</sub>1: Mecanismo
Reacción SN1: Mecanismo
Kinetic studies of ionization of a tertiary halide in a protic solvent suggest that only the substrate participates in the rate-determining step (slow ...
Reacción S<sub>N</sub>1: Estereoquímica
Reacción SN1: Estereoquímica
This lesson provides an in-depth discussion of the stereochemical outcomes in an SN1 reaction. In the first step of an SN1 reaction, the bond between the ...
Prediciendo los productos: S<sub>N</sub>1 vs. S<sub>N</sub>2
Prediciendo los productos: SN1 vs. SN2
Nucleophilic substitution reactions of alkyl halides can proceed via an SN1 or an SN2 mechanism. While in SN2 reactions, the nucleophile attacks the ...
Reacciones de eliminación
Reacciones de eliminación
A nucleophile can react with an alkyl halide to give the substitution product by displacing the halogen. Or it can function as a base to give the ...
Reacción E2: Cinética y Mecanismo
Reacción E2: Cinética y Mecanismo
SN2 substitutions and E2 eliminations of alkyl halides proceed via a concerted pathway. While the nucleophile attacks the alpha carbon in SN2 reactions, ...
Reacción E2: Estereoquímica y Regioquímica
Reacción E2: Estereoquímica y Regioquímica
Elimination reactions of alkyl halides can yield one or more alkenes depending on the specific regiochemical and stereochemical considerations. While the ...
Reacción E1: Cinética y Mecanismo
Reacción E1: Cinética y Mecanismo
Here, in contrast to the E2 reaction mechanism, we delve into the aspects of the E1 reaction mechanism, which has two steps: rate-limiting loss of the ...
Reacción E1: Estereoquímica y Regioquímica
Reacción E1: Estereoquímica y Regioquímica
One of the critical aspects of the E1 reaction mechanism, as also observed in E2, is the regiochemistry, with multiple regioisomers obtained as products. ...
Prediciendo los productos: Sustitución vs. Eliminación
Prediciendo los productos: Sustitución vs. Eliminación
When a nucleophile and an alkyl halide react, nucleophilic substitution and β-elimination reactions compete to generate products. The following ...
JoVE Logo

Privacidad

Condiciones de uso

Políticas

Investigación

Educación

ACERCA DE JoVE

Copyright © 2025 MyJoVE Corporation. Todos los derechos reservados