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Which of the following species is paramagnetic in nature
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Verified Answer
The correct answer is:
Carbanion
Without intermediate reaction take place as under
(According to markownikoff rule)
But the halogen bonded with terminal carbon so it take place in presence of peroxide by free radical mechanism.
$\underset{\text { peroxide }}{-O-O R} \rightarrow 2 R \dot{O} ; \mathrm{HBr}+\dot{\mathrm{RO}} \rightarrow \mathrm{ROH}+\mathrm{Br}$.
$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2+\mathrm{Br} \rightarrow \mathrm{CH}_3-\mathrm{C} \dot{\mathrm{H}}-\mathrm{CH}_2-\mathrm{Br}$
$\mathrm{CH}_3-\mathrm{C} \mathrm{H}-\mathrm{CH}_2 \mathrm{Br}+\mathrm{HBr} \rightarrow$ $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Br}+\mathrm{Br}$.
(According to markownikoff rule)
But the halogen bonded with terminal carbon so it take place in presence of peroxide by free radical mechanism.
$\underset{\text { peroxide }}{-O-O R} \rightarrow 2 R \dot{O} ; \mathrm{HBr}+\dot{\mathrm{RO}} \rightarrow \mathrm{ROH}+\mathrm{Br}$.
$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2+\mathrm{Br} \rightarrow \mathrm{CH}_3-\mathrm{C} \dot{\mathrm{H}}-\mathrm{CH}_2-\mathrm{Br}$
$\mathrm{CH}_3-\mathrm{C} \mathrm{H}-\mathrm{CH}_2 \mathrm{Br}+\mathrm{HBr} \rightarrow$ $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Br}+\mathrm{Br}$.
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