Which of the following is the final and major product of this reaction?
A)I
B)II
C)III
D)IV

Question

Which of the following is the final and major product of this reaction? 
A)I 
B)II 
C)III 
D)IV

Quizplus · Accepted Answer

The reactant in this reaction is an alkyl halide with a carbon-carbon double bond, which suggests that an elimination reaction will occur. The reagent in the reaction is a strong base, which favors the E2 mechanism. In the E2 mechanism, the leaving group (Br) and a proton from an adjacent carbon are expelled to form a pi bond between the two carbons. The final product is an alkene with the same number of carbons as the starting material. In this case, there are five carbons in both the starting material and the product, so the answer is I.

Which of the Following Is the Final and Major Product