二、炔烃的物理性质《医用化学》

二、炔烃的物理性质

在正炔烃的同系列中,C2~C4的炔烃是气体,C5~C15的是液体,C15以上的是固体。炔烃的熔点和沸点也随着碳原子数目的增加而增高(表11-5)。

表11-5炔烃的物理常数

名称构造式熔点/℃沸点/℃相对密度(d204)
乙炔HC≡CH-81.8-83.6-
丙炔CH3C≡CH-101.51-23.2-
1-丁炔CH3CH2C≡CH-122.58.1-
2-丁炔CH3C≡CCH3-32.3270.691
1-戊炔CH3(CH2)C≡CH-9029.30.695
2-戊炔CH3CH2C≡CH-10155.50.714
1-己炔CH3(CH2)3C≡CH-132710.715
2-己炔CH3(CH2)2C≡CH-88840.730
3-己炔CH3CH2C≡CCH3-5181.80.724
1-庚炔CH3(CH2)4C≡CH-811000.734
2-庚炔CH3(CH2)3C≡CCH3-1120.748
3-庚炔CH3(CH2)2C≡CCH3-1050.752
1-辛炔CH3(CH2)5C≡CH-80125.20.746
2-辛炔CH3(CH2)4C≡CCH3-60.2137.20.759
3-辛炔CH3(CH2)C≡CCH2CH3-1051330.752
4-辛炔CH3 (CH2) 2C≡C(CH2)2CH3-1021310.751
1-壬炔CH3(CH2)6C≡CH-65160.70.760
2-壬炔CH3(CH2)5C≡CCH3-1557470.769
3-壬炔CH3(CH2)4C≡CCH2CH3-1547450.762
4-壬炔CH3(CH2)3C≡C(CH2)2CH3-1527520.757
1-癸炔CH3(CH2)7C≡CH-44 0.765
3-癸炔CH3(CH2)5C≡CCH2CH3- 0.765

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