question_answer

Which of the following is the most stable alkene?

A)  \[{{R}_{2}}C=C{{R}_{2}}\]                           

B)  \[RCH=CHR\]

C)  \[RCH=C{{H}_{2}}\]                       

D)  \[C{{H}_{2}}=C{{H}_{2}}\]

Correct Answer: A

Solution :

                We know that the greater the number of alley groups attached to double bonded carbon atoms, more stable is the alkene. Therefore most stable alkene is \[{{R}_{2}}C=C{{R}_{2}}\] Order of stability of alkenes is \[C{{H}_{2}}=C{{H}_{2}}<RCH=C{{H}_{2}}<RCH\] \[=CHR<{{R}_{2}}C=C{{R}_{2}}\]