How many isomers with molecular formula $\mathrm { C } _ { 6 } \mathrm { H } _ { 10 }$ contain an internal alkyne?

Question

Quizplus · Accepted Answer

For a molecule with the formula $\mathrm{C}_6\mathrm{H}_{10}$ to contain an internal alkyne (a triple bond not at the end of the carbon chain), it must have its triple bond starting at the second carbon when counting from either end, as placing the triple bond at the first carbon would result in a terminal alkyne. The possible isomers include: 1. 2-hexyne, 2. 3-hexyne, and 3. a branched isomer with the triple bond starting from the second carbon on a pentane chain, leading to a methyl group attached to the second carbon (2-methyl-1-pentyne). This accounts for three distinct isomers containing an internal alkyne.

How Many Isomers with Molecular Formula C6H10\mathrm { C } _ { 6 } \mathrm { H } _ { 10 }C6​H10​

How Many Isomers with Molecular Formula $\mathrm { C } _ { 6 } \mathrm { H } _ { 10 }$