What would be the common name of this compound and how would we do the numbering and why would we write it in that certain way?

Dear student

During naming of a compound we must keep in mind to give minimum numbering to the double or triple bonds.
In this case if we go from left to right , triple bond gets 2 numbering but if we go from right to left then triple bond would get 3 number.
So, numbering would be from left to right.
The IUPAC name of this compound would be Pent-2-yne.

Common name = 2-Pentyne or Ethylmethylacetylene


Regards

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