Chemistry · 2013
Organic Chemistry: Some Basic Principles and TechniquesFundamental Concepts in Organic Reaction Mechanism
NEET 2013 · 18 May · Code Y · Q155
Homolytic fission of the following alkanes forms free radicals CH_3- CH_3, CH_3- CH_2- CH_3, ( CH_3)_2 CH - CH_3, CH_3- CH_2- CH ( CH_3)_2.…
Homolytic fission of the following alkanes forms free radicals $\displaystyle \mathrm{CH}_3-\mathrm{CH}_3, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_3$, $\displaystyle \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{CH}_3, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)_2$. Increasing order of stability of the radicals is :
Official answer
(4)
$\displaystyle \mathrm{CH}_3-\dot{\mathrm{C}} \mathrm{H}_2<\mathrm{CH}_3-\dot{\mathrm{C}} \mathrm{H}-\mathrm{CH}_3<\left(\mathrm{CH}_3\right)_2 \dot{\mathrm{C}}-\mathrm{CH}_2-\mathrm{CH}_3<\left(\mathrm{CH}_3\right)_3 \dot{\mathrm{C}}$
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