Ishwar S. answered • 06/06/19
University Professor - General and Organic Chemistry
The structure is a 7-carbon chain = heptane.
A carbon-carbon triple bond is present making the compound an alkyne. Therefore, heptane changes to heptyne.
The triple bond MUST be assigned the lowest carbon #, which will be carbon #3. The alkyne will thus be named as 3-heptyne (or hept-3-yne depending on how your professor has taught you nomenclature).
Finally, the substituent, the methyl group, MUST also be assigned the lowest carbon #, which will be carbon #2. You would then name this substituent as 2-methyl.
Now put all the above fragments together by writing the location and name of the substituent first followed by the alkyne and the position of the triple bond.
2-Methyl-3-heptyne (OR 2-Methylhept-3-yne)
