10 Questions
In the SN1 mechanism, the rate-determining step involves:
Formation of a carbocation
The SN2 mechanism is characterized by:
Simultaneous displacement of the leaving group and attack by the nucleophile
In the hydrolysis of bromomethane in aqueous base, the energy necessary for breaking the C-Br bond is supplied by:
Formation of the HO-C bond
The approach by -OH along the line of centers of the C & Br is associated with:
Lowest energy for the reaction
The transition state for SN2 mechanism involves:
Inversion of configuration (Walden inversion)
In the SN1 mechanism, the rate of the reaction depends on:
The concentration of the alkyl halide only
In the SN2 mechanism, the stereochemistry of the product shows:
Inversion of configuration
In the hydrolysis of bromomethane in aqueous base, the rate-determining step involves:
Partial attachment of -OH to carbon before Br- is fully detached
In the SN2 mechanism, the nucleophile attacks the carbon atom:
Along the line of centers of the C & Br
The hydrolysis of bromomethane in aqueous base is classified as:
Bimolecular
Study Notes
SN1 Mechanism
- The rate-determining step involves a unimolecular process
- The rate of the reaction depends on the concentration of the substrate
SN2 Mechanism
- Characterized by a bimolecular process
- The transition state involves a pentacoordinate carbon atom
- The nucleophile attacks the carbon atom from the backside, resulting in an inversion of stereochemistry
- Stereochemistry of the product shows an inversion of configuration
Hydrolysis of Bromomethane
- The energy necessary for breaking the C-Br bond is supplied by the aqueous base
- The rate-determining step involves a bimolecular process
- Classified as an SN2 reaction
Test your knowledge of nucleophilic substitution mechanisms with this quiz covering SN1 and SN2 reactions. Challenge yourself to understand the differences between unimolecular and bimolecular substitution processes.
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