# Name the following compounds? (in description)

## 1. CH≡C CH_2CH_2CH_2CH_3 2. CH_3C≡C CH_2CH_2CH_3 3. CH_3CH_2C≡C CH_2CH_3 4. CH_3CH_2CH_2C≡C CH_3 5. CH_3CH_2CH_2CH_2C≡CH

You gots three $\text{hexyne}$ derivatives.....
Clearly, it does not matter from which END we number the carbon chain. We gots $\text{1-hexyne}$, $\text{2-hexyne}$, and $\text{3-hexyne}$...
Of course, $4.$ is $\text{2-hexyne}$, and $5.$ is $\text{3-hexyne}$...