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Ⅲ.关於两个骈联的环己烷及其衍生物的构象十氢萘有顺及反的异构体都为椅形已如上述,根据若干的物理测验如电子折射测验,X光線衍射分析以及热力学检查都可推定逆反式的十氢萘为Ⅰ式,即两个环己烷相互的以ee键相骈联,而顺式十氢萘Ⅱ则系两个环己烷互相以ep键相骈朕,两者都较船形Ⅲ为稳定,Ⅱ因其分子中能量较Ⅰ为高故较不稳固,Ⅱ式上表示分子能量之增加数量,即Ⅰ作为零,Ⅱ则有三面弯曲互相牵制的影晌,每面为0.8千卡3×0.8=2.4千卡,此为其能量与Ⅰ相比之差数。化合物如知其构象即可算出其分子能量
III. CONTEXT ON THE CONJUGATES OF THE TWO CHAINS OF CYCLOHEXANE AND THEIR DERIVATIVES The cis and trans isomers of the decahydronaphthalene are all chair-shaped as described above, according to several physical tests such as electron refraction test, X-ray diffraction analysis And thermodynamic examination can be presumed to be inverse decalin naphthalene Ⅰ type, that is, two cyclohexane ee bond with each other, while the cis-decalin II Department of two cyclohexane each other ep ep phase骈 朕, both are more stable than the ship Ⅲ, Ⅱ because of its energy in the molecule than I is relatively unstable, Ⅱ on the molecular energy that the increase in the number of that Ⅰ as a zero, Ⅱ there are three mutual restraint Effect, each side of 0.8 kcal 3 × 0.8 = 2.4 kcal, this is the difference between its energy and Ⅰ. Compounds can calculate their molecular energy if they know their conformation