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 number of alkyl 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 \[C{{H}_{2}}=C{{H}_{2}}<RCH=C{{H}_{2}}\] \[<RCH=CHR<{{R}_{2}}C=C{{R}_{2}}\]