What is the major organic product obtained from the following reaction? a. 1 b.

Question

What is the major organic product obtained from the following reaction? a. 1 b. 2 c. 3 d. 4 What is/(are) the major organic product(s) obtained from the following substitution reaction? a. only 1 b. only 2 c. only 1 and 2 d. 1, 2 and 3 Which of the following energy diagrams represents the course of an exothermic E2 reaction? a. 1 b. 2 c. 3 d. 4 Which of the following represents the transition state of the rate-determining step in the reaction between 2-bromopropane and sodium methoxide leading to elimination?

Explanation / Answer

22) we get E1 eleimination where intermediate is C+. We get C+ reaarangement due to CH3- shift. More substituted alkene is formed

22-B

23) ally C+ is stable , hence we get SN1 reaction. Products are 1,2,3 (we get rearrangement also)

23-D

24) Exothermic means heat released ( products lower in energy compared to reactanats) , E2 means single step reaction , hence only 1 transition state

24-C

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