Question

What is the correct IUPAC name of the given compound?

• A. 3-phenylpropan-2-one
• B. 1-phenylbutan-2-one
• C. 1-phenylpropan-2-one
• D. 3-phenylbutan-2-one

Answer 1

The correct option is C 1-phenylpropan-2-one

If an aromatic compound consists of an open and a closed chain, principle chain will be the open chain if it has more than one carbon. Also if a functional group is present in open chain, benzene will act as a substituent. Therefore, the numbering of the given compound can be done as following:
Hence the IUPAC name of the compound is 1-phenylpropan-2-one.