Question

What is the IUPAC name of this compound?

Answer 1

The full form of IUPAC is the International Union of Pure Applied Chemistry. It is a method of naming the organic chemical compounds as recommended by the union. There are also some rules in nomenclature that we have to follow while naming the organic compound.

Complete answer:
As we can see that double and triple bonds both are present in the compound so we follow the priority rule of IUPAC nomenclature. In the above compound the higher priority will be given to the triple bond and then to the double bond. So we start our counting from the left hand side and we get the triple bond that is alkyne at position two and the double bond that is alkene at position five. So the required IUPAC name of this compound is oct-$5$-en-2-$yne$. But if the number is the same, that is their position is the same after counting from both the left hand side and right hand side, so double bond takes preference there.

Note:
The priority order of the compounds are shown here. It is from the highest to lowest priority order. Carboxylic acid > Sulfonic acid > ester > acid halide > amide > nitrile > aldehyde > ketone > alcohol > thiol > amine > alkene > alkyne. The highest priority group present in the compound is the principal functional group and it is always numbered such that it has or got the lowest number