The stability if #Me_2 C=CH_2# is more than that of #MeCH_2CH=CH_2# due to A. Inductive effect of #Me# group B. Resonance effect of #Me# group C. Hyperconjugative effect of #Me# group D. Resonance as well as inductive effect of #Me# group ?

1 Answer
Mar 19, 2018

#Me_2C=CH_2# is more stable than #MeCH_2CH=CH_2# because of the Hyperconjugation.

Explanation:

In #Me_2C=CH_2# with respect to Alkene the number of #alpha#-Hydrogen atoms are #6# (ie the number of hydrogen atoms taking part in hyperconjucation ).

While in #MeCH_2CH=CH_2# , the number of #alpha#-Hydrogen atoms are #2#.

So, the extent of hyperconjugation is more in #Me_2C=CH_2# than in #MeCH_2CH=CH_2#.

Thus, #Me_2C=CH_2# si more stable than #MeCH_2CH=CH_2#.

Hyperconjucation as explained in book by Paula Y. Bruice :-

Organic chemistry,10th edition