Determine if the equation is SN1, SN2,E2 or E1.
CH3CH2O- + CH3CH2BR = CH3CH2OCH2CH3 + BR-
I think that this is SN2.
Would you agree?
Yes, I agree that this reaction can be classified as an SN2 (Substitution Nucleophilic Bimolecular) reaction.
To determine the reaction mechanism, we need to consider the key elements of an SN2 reaction:
1. Molecular Structure: SN2 reactions typically involve a nucleophile attacking the substrate (in this case, CH3CH2BR) from the backside, leading to a concerted transition state.
2. Reaction Rate: SN2 reactions exhibit second-order kinetics, meaning their rate is dependent on the concentration of both the nucleophile and the substrate.
3. Steric Interactions: SN2 reactions are favored when the substrate has minimal steric hindrance around the carbon atom that undergoes substitution. In this case, the CH3CH2BR substrate does not have substantial steric hindrance.
Now, let's consider the given reaction. The CH3CH2O- (ethoxide) acts as the nucleophile attacking the CH3CH2BR (bromoethane) substrate. The arrow pushing indicates a concerted process, where the bromide ion (BR-) is displaced, and a new molecule, CH3CH2OCH2CH3 (diethyl ether), is formed.
Since this reaction involves a nucleophile attacking the substrate molecule directly from the backside, it meets the criteria for an SN2 reaction. Therefore, you are correct in identifying this reaction as SN2.