Question

What will be the correct IUPAC name for the following compound ?

• A. $\text{1-(But-1-enyl) cyclohexane}$
• B. $\text{1-cyclohexyl-2-ethyl ethene}$
• C. $\text{1-cyclohexylbut-1-ene}$
• D. $\text{1-cyclohexyl-3-methyl prop-1-ene}$

Answer 1

The correct option is C $\text{1-cyclohexylbut-1-ene}$

As acyclic part contains double bond, the open chain will be parent chain and cyclic part will be considered as substituent. Numbering has to be done in a way that double bond get lower locant number.
Hence, The correct IUPAC name of the given compound is $\text{1-cyclohexyl but-1-ene}$