23. Congo Red is a synthetic dye whose use was later abandoned because of its carcinogenic properties. Four students attempted to synthesize the dye using different starting organic reagents. HO,S NH2 Congo Red Student Christopher I II II HO,S NH2 NH: Nelson. HN HN- -NH, SO,H Noel H:SO, SO HN- NH: NH, Voltaire HOSS HN H.N- NH Who among the students is most likely to synthesize Congo Red using their starting organic reagent?

Macroscale and Microscale Organic Experiments
7th Edition
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Kenneth L. Williamson, Katherine M. Masters
Chapter44: The Sandmeyer Reaction:1-bromo-4-chlorobenzene, 2-iodobenzoic Acid, And 4-chlorotoluene
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23. Congo Red is a synthetic dye whose
use was later abandoned because of its
carcinogenic properties. Four students
attempted to synthesize the dye using
different starting organic reagents.
HO,S
sO-H
Congo Red
Student
II
II
Christopher
HO,S
NH3
NH,
Nelson
NH
SO,H
Noel
H.SO, SO.
HN
NH:
NH
Voltaire
HO్కక్ష
H.N
HN
HN
so,H
Who among the students is most likely to
synthesize Congo Red using their starting
organic reagent?
Nelson and Voltaire
Nelson
Christopher and Noel
Noel
Transcribed Image Text:23. Congo Red is a synthetic dye whose use was later abandoned because of its carcinogenic properties. Four students attempted to synthesize the dye using different starting organic reagents. HO,S sO-H Congo Red Student II II Christopher HO,S NH3 NH, Nelson NH SO,H Noel H.SO, SO. HN NH: NH Voltaire HO్కక్ష H.N HN HN so,H Who among the students is most likely to synthesize Congo Red using their starting organic reagent? Nelson and Voltaire Nelson Christopher and Noel Noel
22. In the preparation of the phenyl
diazonium salt, sodium nitrite and
hydrochloric acid were used instead of
directly adding nitrous acid. Why was
nitrous acid prepared in situ?
Sodium nitrite and hydrochloric acid lowers the
temperature of the reaction.
Sodium nitrite and hydrochloric acid are ortho-,
para- directors.
Nitrous acid may deactivate the phenyl ring.
Nitrous acid is unstable and readily decomposes.
Transcribed Image Text:22. In the preparation of the phenyl diazonium salt, sodium nitrite and hydrochloric acid were used instead of directly adding nitrous acid. Why was nitrous acid prepared in situ? Sodium nitrite and hydrochloric acid lowers the temperature of the reaction. Sodium nitrite and hydrochloric acid are ortho-, para- directors. Nitrous acid may deactivate the phenyl ring. Nitrous acid is unstable and readily decomposes.
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