Question

identify the preferred site(s) of electrophilic attack on the following compound 1-CH-04 >> ringt r ing 2 A) ortho para positions on ring 1 B) meta position on ring 2 C) meta position on ring 1 D) orthopara positions on ring 2 2) The major products) in the nitration of benzoic acid isare) A) nitrobenzene. B) nitroben ene and para-nitrobenzoic acid. C) mixture of the and pre-nitrobenzoic acid. D -nitrobenzoic acid. 3) What is the electrophile in the Friedel-Crafts alkylation reaction below? C(CHỊ) (CH)CCI AICI benzene (CHÚC What is the major product of the Friedel-Crafts alkylation of benzene with (CH) CHCH.Cl and AICI,? sre-butylbenzene tert-butylbenzene butylbenzene isobutylbenzene

Answer 1

1) D) ortho para positions on ring 2

Alskoxy group is activationg, ortho para directing

2) D) met-nitrobenzoic acid

-COOH group is meta directing deactivating group

3) electrophile is tert butyl carbocation

(CH3)3C+

4) major product is tert butyl benzene

Less stable primary carbocation
(CH3)2CHCH,
rearranges to more stable tertiary carbocation
(CH3)3C+

via hydride ion migration.