Question

The IUPAC name of the given compound is:

• A. 1- Butyne
• B. But- 1- ene
• C. 1- Propene
• D. But- 3- ene

Answer 1

The correct option is B But- 1- ene

• The parent chain contains four carbon atoms.
• So, Word root= But.
• According to the IUPAC rules of nomenclature, while numbering the carbon atoms, the carbon with the double bond should be at the lowest position.
• Therefore, the IUPAC name of the given structure is 1- Butene or But- 1- ene.