【摘要】 液态的碳氢化合物分子体积等于官能团拓扑体积之和,即服从于加和性原则。在不同的烃类中相同的官能团有十分接近的体积贡献。官能团的拓扑体积,V（CH₂）=27.24（?）³,V（CH₃）=55.11（?）₃,V（-CH=CH₂）=70.12（?）³,V（-CH=CH-）=40.98（?）³,V（-C≡CH）=51.58（?）³,V（-C≡C-）=21.18（?）³,V（H）端部=29.32（?）³。V（C₆H₅-）=120.08（?）³,V（-C₆H₄-）=89.92（?）³,V（-C₆H₄=）=61.51（?）³。液态碳氢化合物的分子体积还可以用如下公式来表示。V=k+13.89·C+6.67H（?³）K为液体常数,烷、烯和炔K=40,苯同系物K=25,环烷烃K=15。C、H分别是分子中C和H的原子数。更多还原

【Abstract】 The molecular volume of the liquid hydrocarbon equals to the sum of the topological volumes of the functional groups, conforming to the principle of additivity. The topological volume value of a functional group in all of the organic compound approximates to a constant respectively, i. e. V (CH2) =27.24 A . V (CH3) =55.11A3, V (-ch = ch2) = 70.12A3, V (-ch = ch-) =40.98A3, V (-ch=ch) = 51.58A. V (-C6H4-) =89.92A3, V (-C6=H3) =61.51A3. The topological volume of the liquid hydrocarbon can al so be obtained from the following eqation:V = K+13.89×C+6.67×H (A3)K refers to the liquid coefficient, K= 15 for the cyclanes. C and H are number of carbon and hydrogen atoms respectively.更多还原