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Functional Group

The IUPAC nam...

Question

The IUPAC name of the compound

A

2(N-Methylcarbamoyl)-1-methylcyclopentane

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B

N-Methyl-2-methylcyclopentanecarboxamide

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C

1-Methyl-2-N-methylcyclohexancarboxamide

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D

1-(N-methylcarbamooyl)-1-methylcyclopentane

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Solution

The correct option is B N-Methyl-2-methylcyclopentanecarboxamide
The longest carbon chain starting from carbon of cyclopentane ring attached to amide group would be the parent ring. Hence, in face parent chain is cyclopentane ring.
Alkyl $(- C H_{3})$ as a substituents while numbering.

Amides $(- C O N H_{2}, - C O N H R, - C O N R_{2})$
Suffix: amide/ carboxamide
Hence, the correct IUPAC name is
$N-Methyl-2-methylcyclopentanecarboxamide$

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Functional Group

Standard XII Chemistry

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