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环烷烃沸点为什么比直链烷烃高

更新时间: 2020-08-16 00:00:00     

环烷烃的物理性质是在常温常压下环丙烷及环丁烷为气体,环戊烷为液体,高级环烷烃为固体。环烷烃的熔点较同数碳原子的直链烷烃高,因为环烷烃比直链烷烃在晶格中排列更紧密。在相同碳原子数的烷烃中,直链的沸点比带支链的高,这是由于在液态下,直链的烃分子易于相互接近,而有侧链的烃分子空间阻碍较大,不易靠近。

关键词: 烷烃 沸点 为什么 直链

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