Give the IUPAC name for the following compound.

Question

Quizplus · Accepted Answer

The carbon chain is numbered from the end closest to the bromine, giving us 1-bromo-4-pentyne. We need to determine the stereochemistry at the chiral center on the second carbon. The priority of the substituents attached to the second carbon are: Br > H > CH3 > CH2CH3. Orienting the lowest priority group (CH2CH3) back, we can see that the other three groups are arranged in a clockwise manner, yielding an R configuration. Thus, the full IUPAC name is (R)-4-bromo-1-pentyne.

Give the IUPAC Name for the Following Compound