VIBRATIONAL OPTICAL ACTIVITY. CIRCULAR DIFFERENTIAL RAMAN SCATTERING FROM A SERIES OF CHIRAL SULFOXIDES
VIBRATIONAL OPTICAL ACTIVITY. CIRCULAR DIFFERENTIAL RAMAN SCATTERING FROM A SERIES OF CHIRAL SULFOXIDES
复制标题
振动光学活动。
DOI：
10.1002/chin.197802041
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
B. Bosnich
中科院分区：
文献类型：
--
作者：
H. Boucher;T. Brocki;M. Moskovits;B. Bosnich
圆微分拉曼散射是在散射强度的差异，是观察到的左和右圆偏振入射光冲击到一个光学活性介质。与手性分子的不同振动模式相关的微分散射与其绝对构型有关。本文报道了一系列简单的光学活性亚砜的微分散射，并讨论了与常见振动模式相关的绝对构型与微分散射之间的关系。这种效应可能最终为确定绝对构型提供一种常规方法。在分子的所有立体化学特征中，确定绝对构型仍然是最后一个结构特征，迄今为止，它还没有受到常规光谱测定的影响。只有异常x射线散射方法能够为结晶性手性物质提供明确的分配。
Circular differential Raman scattering is the difference in scattering intensity that is observed for left and right circularly polarized incident light impinging upon an optically active medium. The differential scatteringassociated with the var-ious vibrational modes of chiral molecules is related to their absolute configurations. Differential scattering from a series of simple optically active sulfoxides is reported and a correlation between the absolute configurations and the differential scattering associated with common vibrational modes is discussed. Theeffect may ultimately provide a routine method for determin-ing absolute configurations.Of all the stereochemical features of molecules, the deter-mination of absolute configuration remains the last structural characteristic which, as yet, is not subject to routine spectroscopic determination. Only the anomalous x-ray scattering method is capable of providing unambiguousassignments for crystalline chiral substances.