JEE MAIN - Chemistry (2013 (Offline) - No. 7)
The order of stability of the following carbocations :
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$${\rm I}{\rm I}{\rm I} > {\rm I}{\rm I} > {\rm I}$$
$${\rm I}{\rm I} > {\rm I}{\rm I}{\rm I} > {\rm I}$$
$${\rm I} > {\rm I}{\rm I} > {\rm I}{\rm I}{\rm I}$$
$${\rm I}{\rm I}{\rm I} > {\rm I} > {\rm I}{\rm I}$$
Giải thích
Higher stability of allyl and aryl substituted methyl carbocation is due to dispersal of positive charge by resonance.
_en_7_2.png)
_en_7_3.png)
whereas in alkyl carbocations dispersal of positive charge on different hydrogen atoms is due to hyper conjugation hence the correct order of stability will be
_en_7_4.png)
whereas in alkyl carbocations dispersal of positive charge on different hydrogen atoms is due to hyper conjugation hence the correct order of stability will be