Q: Alkenes show typical electrophilic addition reactions. If an electron with drawing group is attached to one of the carbons bearing the double bond, what will happen to the mechanism of the addition reaction?
- A. It remains electrophilic
- B. It becomes free radical addition
- C. It becomes pericyclic reaction
- D. It becomes nucleophilic
Correct Answer:
Option D - Simple alkenes (unsaturated hydrocarbons ) are not much electrophilic to undergo addition with nucleophiles, but the mechanism of addition reaction can change when their carbon-carbon double bond is activated by the presence of electron with drawing groups (EWG). It leads to polarization of double bond and becomes nucleophilic (i.e susceptible to a nucleophilic attack).
D. Simple alkenes (unsaturated hydrocarbons ) are not much electrophilic to undergo addition with nucleophiles, but the mechanism of addition reaction can change when their carbon-carbon double bond is activated by the presence of electron with drawing groups (EWG). It leads to polarization of double bond and becomes nucleophilic (i.e susceptible to a nucleophilic attack).
Explanations:
Simple alkenes (unsaturated hydrocarbons ) are not much electrophilic to undergo addition with nucleophiles, but the mechanism of addition reaction can change when their carbon-carbon double bond is activated by the presence of electron with drawing groups (EWG). It leads to polarization of double bond and becomes nucleophilic (i.e susceptible to a nucleophilic attack).Address
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