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An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?
1. C*H_{2} = C*H_{2}
CH3
II. C*H_{3} - CH = C*H_{2}
C*H_{3} - CH = dot C -CH 3
IV. C*F_{3} - CH = C*H_{2}?
Most Upvoted Answer
An alkene on treatment with meta chloro perbenzoic acid undergoes epox...
Introduction
The epoxidation of alkenes using meta-chloro perbenzoic acid is an important reaction in organic chemistry. The reactivity of alkenes towards epoxidation is influenced by factors such as sterics and electronics.

Reactivity Order Analysis
To determine the correct order of increasing reactivity among the given alkenes, we need to consider their structural features:
  • I. CH2 = CHCH3 (Propene)
  • II. CH3 - CH = CH2 (2-Butene)
  • III. CH3 - CH = dot C - CH3 (1-Butene)
  • IV. CF3 - CH = CH2 (Trifluoroethylene)



Factors Affecting Reactivity
1. **Electronic Effects**:
- The presence of electron-withdrawing groups (like trifluoromethyl) increases the reactivity of alkenes by stabilizing the carbocation-like transition state during epoxidation.
2. **Steric Hindrance**:
- More sterically hindered alkenes may be less reactive due to the difficulty of approach to the electrophilic reagent.

Correct Order of Increasing Reactivity
Considering both electronic and steric factors, the order of increasing reactivity in the epoxidation reaction is:
  • III. CH3 - CH = dot C - CH3 (Least reactive due to steric hindrance)
  • I. CH2 = CHCH3 (Moderately reactive)
  • II. CH3 - CH = CH2 (More reactive due to less sterics)
  • IV. CF3 - CH = CH2 (Most reactive due to electron-withdrawing effect)



Conclusion
Thus, the correct order of increasing reactivity for the epoxidation reaction using meta-chloro perbenzoic acid is III < ii="" />< i="" />< iv.="" />
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An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?1. C*H_{2} = C*H_{2}CH3II. C*H_{3} - CH = C*H_{2}C*H_{3} - CH = dot C -CH 3IV. C*F_{3} - CH = C*H_{2}?
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An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?1. C*H_{2} = C*H_{2}CH3II. C*H_{3} - CH = C*H_{2}C*H_{3} - CH = dot C -CH 3IV. C*F_{3} - CH = C*H_{2}? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?1. C*H_{2} = C*H_{2}CH3II. C*H_{3} - CH = C*H_{2}C*H_{3} - CH = dot C -CH 3IV. C*F_{3} - CH = C*H_{2}? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?1. C*H_{2} = C*H_{2}CH3II. C*H_{3} - CH = C*H_{2}C*H_{3} - CH = dot C -CH 3IV. C*F_{3} - CH = C*H_{2}?.
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