2
Question
Pick out the correct reactions:
A. CH3−CH=CH2+HCl⟶CH3−C|ClH−CH3
B. CH3−CH=CH2+HBr⟶CH3−CH2−CH2Br
C. CH3−CH=CH2+HBrperoxide−−−−−→CH3−CH2−CH2−Br
D. CH3−CH=CH2+HIperoxide−−−−−→CH3−C|IH−CH3
Pick out the correct reactions:
A. CH3−CH=CH2+HCl⟶CH3−C|ClH−CH3
B. CH3−CH=CH2+HBr⟶CH3−CH2−CH2Br
C. CH3−CH=CH2+HBrperoxide−−−−−→CH3−CH2−CH2−Br
D. CH3−CH=CH2+HIperoxide−−−−−→CH3−C|IH−CH3
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Solution
The correct option is C A, C and D
The addition of a hydrogen halide to an alkene follows Markovnikov's rule but in the presence of a peroxide, anti-Markovnikov's addition will be followed. The peroxide effect does not hold good for HCl and HI. It is applicable only for HBr as shown below:
CH3−CH=CH2+HBr⟶CH3−C|BrH−CH3
The addition of a hydrogen halide to an alkene follows Markovnikov's rule but in the presence of a peroxide, anti-Markovnikov's addition will be followed. The peroxide effect does not hold good for HCl and HI. It is applicable only for HBr as shown below:
CH3−CH=CH2+HBr⟶CH3−C|BrH−CH3
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