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Chapter 6

친핵성 치환과 알킬 할라이드 반응 제거

알킬 할리데스
알킬 할리데스
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 ...
뉴클레오필성 대체 반응
뉴클레오필성 대체 반응
Historical perspective In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a ...
뉴클레오필
뉴클레오필
The word “nucleophile” has a Greek root and translates to nucleus-loving. Nucleophiles are either negatively charged or neutral species with a ...
전기 애호가
전기 애호가
This lesson explains the definition, classification, and characteristic features of an electrophile that are key features of nucleophilic substitution ...
그룹 탈퇴
그룹 탈퇴
The nature of leaving groups strongly influences the outcome of a nucleophilic substitution reaction. In general, in a nucleophilic substitution reaction, ...
카보케이션
카보케이션
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an ...
S<sub>N</sub>2 반응: 운동학
SN2 반응: 운동학
Kinetic Studies and Significance In a chemical reaction, a relationship exists between the concentration of reactants and the rate at which the reaction ...
S<sub>N</sub>2 반응: 메커니즘
SN2 반응: 메커니즘
The kinetic studies of SN2 reactions suggest an essential feature of its mechanism: it is a single-step process without intermediates. Here, both the ...
S<sub>N</sub>2 반응: 전환 상태
SN2 반응: 전환 상태
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 ...
S<sub>N</sub>2 반응: 스테레오케미스케
SN2 반응: 스테레오케미스케
In an SN2 reaction, the nucleophilic attack on the substrate and departure of the leaving group occurs simultaneously through a transition state. As the ...
S<sub>N</sub>1 반응: 운동학
SN1 반응: 운동학
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 ...
S<sub>N</sub>1 반응: 메커니즘
SN1 반응: 메커니즘
Kinetic studies of ionization of a tertiary halide in a protic solvent suggest that only the substrate participates in the rate-determining step (slow ...
S<sub>N</sub>1 반응: 스테레오케미스케
SN1 반응: 스테레오케미스케
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 ...
제품 예측: S<sub>N</sub>1 vs. S<sub>N</sub>2
제품 예측: 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 ...
제거 반응
제거 반응
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 ...
E2 반응: 운동 및 메커니즘
E2 반응: 운동 및 메커니즘
SN2 substitutions and E2 eliminations of alkyl halides proceed via a concerted pathway. While the nucleophile attacks the alpha carbon in SN2 reactions, ...
E2 반응: 스테레오케미케와 재조화학
E2 반응: 스테레오케미케와 재조화학
Elimination reactions of alkyl halides can yield one or more alkenes depending on the specific regiochemical and stereochemical considerations. While the ...
E1 반응: 운동 및 메커니즘
E1 반응: 운동 및 메커니즘
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 ...
E1 반응: 스테레오케미케와 재조화학
E1 반응: 스테레오케미케와 재조화학
One of the critical aspects of the E1 reaction mechanism, as also observed in E2, is the regiochemistry, with multiple regioisomers obtained as products. ...
제품 예측: 대체 대 제거
제품 예측: 대체 대 제거
When a nucleophile and an alkyl halide react, nucleophilic substitution and β-elimination reactions compete to generate products. The following ...
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