JUuitle the best answer. (2 pts each) 1) Which of the following is Dot acorrect
ID: 509463 • Letter: J
Question
JUuitle the best answer. (2 pts each) 1) Which of the following is Dot acorrect statement the electrophilic substitution mechanism of benzene? about A) Benzene functions as a nucleophile. B) Formation of a carbocation intermediate is the rate-determining step. C The intermediate contains an sp3 hybridized carbon in the ring. D) The addition product is a frequent minor product. E) Aromaticity is regained by loss of H+ 2) hich of the following is the electrophile that attacks the aromatic ring during sulfonation? B) SO2 D) H2SO4. E) HSO4 B) II A) I 4) Which of the following substrates is an electron donating group overall? E) -CC13 A) -Br N(CH3)3 which of the following substituents acts as a moderate activator and op director in electrophilic aromatic substitution reactions? E) -CHO D) -NHCOR. B)-SO3H A) -Br Which of the following electrophilic aromatic substitution is reversible? C) Friedel Crafts Acylation B) nitration A) halogenation D Friedel-Crafts Alkylation E) sulfonation Which off the following substituent on the benzene ring is a strong deactivator? A)- N(CH3 3 B) NH (CH3)2 C) NH2CH3 E) all of the above D)-NO2 8) In electrophilic aromatic substitution, a halogen substituent is considered as A) strongly activating B) strongly deactivating C) weakly activating. D) weakly deactivating E moderately activating.Explanation / Answer
(1) (C)
The carbocation intermediate has sp2 carbon but not sp3 carbon
(2)
(A) HSO3+ is an electrophile that attacks benzene ring.
(3)
(D) IV: C6H5OH
(4) (C) - OCH3 is an electon donating group because O has two lone pairs.
(5) (A) Br
Halogens are moderate activators and ortho, para directing groups
(6) (E) Sulfonation is a reversible electrophilic substitution reaction
(7) (D) is strong deactivator
(8) (E) Moderately activating
(9) (D) IV due to the presence of strong electron withdrawing - NO2 groups
(10) (A)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.