Question

What would be the IUPAC name of the compound shown below?

• A. 2, 2-Cyclohexane
• B. Dimethylcyclobutane
• C. 1-Ethylcyclobutane
• D. 1, 1-Dimethylcyclobutane

Answer 1

The correct option is D

1, 1-Dimethylcyclobutane

The given compound is cyclo alkane with 4 carbon forming the ring.On one of these carbon atoms, there are two methyl substituents.

The numbering is as follows:

parent ring has 4 carbon atoms.

Word root=but

primary suffix=ane

secondary prefix=1,1-dimethyl{2 methyl substituent both at $C_1$}

hence the IUPAC name is

(d) 1, 1-Dimethylcyclobutane