直鎖状
| 組成式 | 示性式 | IUPAC | 慣用名 |
| C2H2 | CH#CH | ethyne (エチン) | acethylene (アセチレン) |
| C3H4 | CH3C#CH | propyne (プロピン) | methylacethylene (メチルアセチレン) |
| C4H6 | CH3CH2C#CH | 1-butine (1-ブチン) | ethylacethylene (エチルアセチレン) |
| C4H6 | CH3C#CCH3 | 2-butine (2-ブチン) |
dimethylacethylene (ジメチルアセチレン) crotonylene (クロトニレン) |