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Question

The IUPAC name of the compound

is

A

B-Methylcyclohexanone

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B

3-Methylcyclohexanone

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C

Methylcyclohexanone

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D

3-Oxotoluene

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Solution

The correct option is B

3-Methylcyclohexanone


The given compound is an acid halide or halogen derivative of a carboxylic acid. When the primary

functional group is O||CX, then ti is named as alkanoyl halide (according to the saturation, substituents etc.).The given compound can be written as:

There are no carbon - carbon multiple bonds

primary suffix = ane
secondary suffix = oyl chloride
secondary prefix =2,3 dimethyl

Hence the IUPAC name is
(b) 2,3-Dimethylpentanoylchloride


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