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Major product is : 

Option: 1


Option: 2


Option: 3


Option: 4


Answers (1)

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As we have learned

Hofmann Elimination of Quaternary hydroxides -

This E2 elimination gives the less substituted alkene ( Hofmann product ) rather than the more substituted alkene ( Saytzeff product ). The alkyl group having maximum hydrogen gives the major alkene if R groups attached to nitrogen are different. 

- wherein

[(CH_{3})_{3}NCH(CH_{3})CH_{2}CH_{3}]^{+}OH^{-}\overset{\bigtriangleup }{\rightarrow}(CH_{3})_{3}N+H_{2}C=CHCH_{2}CH_{3}+H_{2}O

                  s - Butyltrimethylammonium  hydroxide                                                          1 - Butene

 

 HOffman's product is major because reaction is dictated more by steric factors 

 

Posted by

Rakesh

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