Chemistry - Nomenclature Question with Solution | TestHub
ChemistryNomenclatureIUPAC nomenclature of compounds containing functional/Polyfunctional groupMedium2 minQB
ChemistryMediumsingle choice
Passage / Comprehension
According to IUPAC nomenclature rules and ester is preffered over alcohol – COOH is preffered over ester & alcohol. Prefixes used for – COOH, – OH &
are carboxy, hydroxy & methoxy carbonyl respectively. When C of – COOH is included in parent C chain then "oic acid" suffix is used & when it is not included 'carboxylic acid ' suffix is used.
What is IUPAC name of
is :
Options:
Answer:
C
Solution:
The principal functional group is −COOH, so numbering starts from the carboxylic carbon.
The longest chain has 4 carbons → parent name = but.
A double bond is present between C-2 and C-3 → but-2-enoic acid.
Chlorine substituent is attached at C-4.
Therefore, the IUPAC name is 4-Chlorobut-2-enoic acid.
Stream:JEESubject:ChemistryTopic:NomenclatureSubtopic:IUPAC nomenclature of compounds containing functional/Polyfunctional group
⏱ 2mℹ️ Source: QB
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