Abstract

The thermolysis and thermocatalytic conversion of modern and ancient resins (amber) of coniferous trees were carried out. It was established that protoadamantanes were formed upon the thermolysis of both ancient and young resins of coniferous trees, while C₁₀–C₁₄ adamantanes found in oils were formed upon thermal catalysis. It was found that thermodynamically weakly stable hydrocarbons of the adamantane series were predominantly formed as a result of the isomerization of protoadamantanes present in the resins (both modern and fossil) of coniferous trees; then, these hydrocarbons were isomerized into thermodynamically more stable isomers. The amount of di- and trimethyladamantanes generated in the products of thermocatalysis of modern resins (relative to monomethyladamantanes) was significantly greater, as compared with that of fossil resins.

中文翻译：

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从现代和古代针叶树的化石树脂（琥珀）中形成金刚烷系列烃

摘要

对针叶树的现代和古代树脂（琥珀）进行了热解和热催化转化。已确定原金刚烷是在针叶树的古老和年轻树脂热解时形成的，而 C ₁₀ –C ₁₄在油中发现的金刚烷是在热催化下形成的。研究发现，金刚烷系列的热力学弱稳定烃主要是针叶树树脂（现代和化石）中存在的原金刚烷异构化的结果；然后，这些碳氢化合物被异构化为热力学上更稳定的异构体。与化石树脂相比，现代树脂的热催化产物（相对于单甲基金刚烷）产生的二甲基金刚烷和三甲基金刚烷的量显着增加。