Explain why chorination of n butane in the presence of light gives a mixture of 72 % of 2 chlorobutane and 28 % of 1 chlorobutane while bromination gives 98 % of 2 bromobutane and 2 % of bromobutane
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The explanation can be provided as follows:
- Based on the question, we can write the reaction as :
CH3CH2CH2CH3 → CH3-CH-CH2-CH3 + CH3CH2CH2CH2-Cl
I
Cl
n-butane 2-Chlorobutane (72%) 1-Chlorobutane (28%)
- If we know the the number and type of hydrogens and their relative rates of substitution, then we can calculate the relative ratios of 2-Chlorobutane and 1-Chlorobutane.
- 1-chlorobutane/ 2-Chlorobutane=
No.of 1 H/No.of 2 H x reactivity of 1 H/Reactivity of 2 H
- 6/4 x 1/3.8
- 28 percent/72 percent
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Explanation:
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