Chemistry - Nomenclature Question with Solution | TestHub
ChemistryNomenclatureIUPAC nomenclature of Aromatic/cyclic compoundsMedium2 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 the position of –OH group (as substituent) according to rules of IUPAC in
Options:
Answer:
A
Solution:
Ester group has higher priority than alcohol, so −OH is treated as a substituent (hydroxy).
Numbering starts from the carbon attached to the ester group.
The carbon bearing the −OH group gets position 6 according to lowest locant rules.
Hence, the position of the hydroxyl substituent is 6.
Stream:JEESubject:ChemistryTopic:NomenclatureSubtopic:IUPAC nomenclature of Aromatic/cyclic compounds
⏱ 2mℹ️ Source: QB
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