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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Temperature Dependence of Optical Rotation: α-Pinene, β-Pinene Pinane, Camphene, Camphor and Fenchone
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Temperature Dependence of Optical Rotation: α-Pinene, β-Pinene Pinane, Camphene, Camphor and Fenchone

机译：旋光度的温度依赖性：α-P烯，β-P烯Pin烷，Camp烯，樟脑和芬琴酮

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摘要

The temperature dependence of the specific rotations of α-pinene, β-pinene, pinane, camphene, camphor, and fenchone were measured in ethylcyclohexane solutions from 0 to 100 ℃, and at several wavelengths. The rotations for α-pinene and camphene have only a very small temperature dependence. In contrast, the specific rotations of β-pinene and pinane decrease significantly with increasing temperature. This does not appear to be a result of a complex between pinane and the solvent, since changing to di-n-butyl ether leads to essentially the same temperature dependence. The specific rotations of camphor and fenchone are temperature sensitive, but in opposite directions. The observed temperature dependence of the specific rotations of these compounds has important consequences for variable temperature studies of chiral compounds having two or more conformers with similar energies.
机译：在0至100℃的乙基环己烷溶液中，在多个波长下测量了α-pine烯，β-pine烯，ane烷，樟脑，樟脑和芬琴的比旋光的温度依赖性。 α-pine烯和camp烯的旋转仅具有非常小的温度依赖性。相反，β-pine烯和pin烷的比旋光度随温度升高而显着降低。这似乎不是pin烷和溶剂之间形成络合物的结果，因为变为二正丁基醚会导致基本相同的温度依赖性。樟脑和芬琴酮的比旋度对温度敏感，但方向相反。对于具有两个或更多个具有相似能量的构象异构体的手性化合物的可变温度研究，观察到的这些化合物比旋度的温度依赖性具有重要的意义。

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