# What is the hydrocarbon formula for #C-=C-C#?

##### 1 Answer

#### Answer:

If you have such a carbon skeleton, then the formula is

#### Explanation:

I have written here before on the idea of degrees of unsaturation, and I am going to do it again. A carbon chain of 3 carbons that are fully saturated has a formula of

For propyne, the saturated carbon chain would