Which of the following is only an electron withdrawing group 19. An unknown comp

Question

Which of the following is only an electron withdrawing group

19. An unknown compound has the formula C8H10OS, and is known to contain a thiophene ring. The proton NMR spectrum of this compound is 60.98, triplet, 3H o1.74, multiplet, 2H O2.80, triplet, 2H o7.04, multiplet, 1H o7.55, multiplet, 2H What is the structure of this unknown? B) A) D) C) H3C E) None of these structures are consistent with the data 20. Which of the following is only an electron withdrawing group C) OCH OH B) A) CH D) SO3H E)

Explanation / Answer

Q.No-20

Answer is (D)

-SO3H is an electron withdrawing group since it has an ability to accept an electron.

Other than -SO3H is electron donating group since it has an ability to donate an electrons.

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