# What is the general formula that represents the compound CH_3CH_2C CH?

May 20, 2017

${\text{R"_1-"C"-="C"-"R}}_{2}$, I suppose, since this is an alkyne, a hydrocarbon with a triple bond (and a pure alkyne has no double bond).

From the single $\text{H}$ on the far right, the far-right carbon must be $s p$-hybridized. It has two $\sigma$ bonds, one with that right-hand $\text{H}$ and one with the next to last carbon.

Structurally...

$\text{H"_3"C"-"CH"_2-"C"-="C"-"H}$

Can you rationalize why this compound is called 1-butyne?

May 20, 2017

${\text{HC"-="CCH"_2"CH}}_{3}$ is $\text{1-butyne}$.

#### Explanation:

$\text{Butyne}$, ${C}_{4} {H}_{6}$ has 2 degrees of unsaturation with respect to saturated $\text{butane}$, ${C}_{4} {H}_{10}$.