156
Question
IUPAC name of m−cresol is _________.
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Solution
The correct option is B 3−methylphenol
IUPAC nomenclature of m−cresol
Structure of m−cresol is:
Alcohol is given higher priority over methyl group. So, it is named by considering that −OH group is attached to C−1.
So, IUPAC name of m−cresol will be 3−methylphenol
Analysing the options
Option (A)
3−methylphenol represents the m−cresol.
Option (B)
Structure of 3−chlorophenol is shown below:
Obviously, it does not represent m−cresol.
Option (C)
Structured of 3−methoxyphenol is shown below:
It too does not represent m−cresol.
Option (D)
Structure of benzene−1,3−diol is shown below:
It too does not represent m−cresol, it is resorcinol. So, the correct answer is option (A).
IUPAC nomenclature of m−cresol
Structure of m−cresol is:
Alcohol is given higher priority over methyl group. So, it is named by considering that −OH group is attached to C−1.
So, IUPAC name of m−cresol will be 3−methylphenol
Analysing the options
Option (A)
3−methylphenol represents the m−cresol.
Option (B)
Structure of 3−chlorophenol is shown below:
Obviously, it does not represent m−cresol.
Option (C)
Structured of 3−methoxyphenol is shown below:
It too does not represent m−cresol.
Option (D)
Structure of benzene−1,3−diol is shown below:
It too does not represent m−cresol, it is resorcinol. So, the correct answer is option (A).
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