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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Symmetry-Itemized Enumeration of Cubane Derivatives as Three-Dimensional Entities by the Elementary-Superposition Method of the USCI Approach
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Symmetry-Itemized Enumeration of Cubane Derivatives as Three-Dimensional Entities by the Elementary-Superposition Method of the USCI Approach

机译:USCI方法的基本叠加方法对称衍生物作为三维实体的对称性序列枚举

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摘要

Cubane derivatives with a given chemical formula and a given symmetry are enumerated by applying the elementary-superposition method (S. Fujita, Theo,: Chim. Acta 1992, 82, 473-498) of the unit-subduced-cycle-index (USCI) approach to a cubane skeleton of the point group O-h. A cycle index (Cl) for a regular or an irregular case of chiral and achiral ligands is calculated in accord with such a given chemical formula. The CI is superposed elementarily onto respective subduced cycle indices with chirality fittingness (SCI-CFs), which are calculated by starting from unit subduced cycle indices with chirality fittingness (USCI-CFs). Thereby, the numbers of fixed points (derivatives) are obtained with respect to the respective SCI-CFs to give a fixed-point vector (FPV). The resulting FPV is multiplied by an inverse matrix of the mark table of O-h to give an isomer-counting vector (ICV), which contains the numbers of 3D-structural isomers in an itemized fashion with respect to point-group symmetries. The concept of prochirality is examined by using cubane derivatives enumerated by the ICV.
机译:通过施加基本叠加方法(S. Fujita,TheO:Chim)来列举具有给定化学式和给定对称的亚甘蔗衍生物。委员会统一 - 循环指数的Acta 1992,82,473-498)(USCI )接近点群的Cubane骨架哦。用于常规或不规则性的手性和成分配体的循环指数(CL)根据这种给定的化学式计算。 CI基本上叠加在具有手性拟合(SCI-CFS)的各个频级索引上,通过从具有手性拟合(USCI-CFS)的单位频循环索引来计算。由此,相对于各个SCI-CF获得固定点(衍生物)的数量以提供定点载体(FPV)。得到的FPV通过O-H的标记表的反向矩阵乘以,以给出异构体计数矢量(ICV),其包含关于点组对称的逐个逐项的三维结构异构体的数量。通过使用ICV枚举的Cubane衍生品来检查促进概念。

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