o. chem multiple choice \"The following intermediate is aromatic, because it has

Question

o. chem multiple choice "The following intermediate is aromatic, because it has four electrons from C=C bonds and two electrons from the N=0 bond in conjugation, so it satisfies Huckel's rule" What is your opinion about this statement? True, because the intermediate has 6 electrons False, because the intermediate has 6 electrons in cyclic conjugation False, because there is no cyclic conjugation True, because there is no cyclic conjugation . False, because the methyl and nitro-groups are in the ortho-position with respect to one another Which of the following reactions leads to a ketone? Which of the following substituents is a significant hyperconjugate donor? A. -OCH3 B. -NH3 + C. -C(=O)CH3 D.-NO2 E. CH3

Explanation / Answer

21. C

False. there is no cyclic conjugation. Huckles rule is (4n+2) Pi electrons where n = 0,1,2,3,....... numbers.

22. D

Because the reaction acylation reaction and the ketone group is present in the structure. remaining all structures are aromatic alkanes only.

23. E

since -CH3 only undergo hyper conjugation since it is electron donating group and remaining all groups are electron withdrawing groups.

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