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首页> 外文期刊>International Journal of Molecular Sciences >Estimating the Octanol/Water Partition Coefficient for Aliphatic Organic Compounds Using Semi-Empirical Electrotopological Index
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Estimating the Octanol/Water Partition Coefficient for Aliphatic Organic Compounds Using Semi-Empirical Electrotopological Index

机译:使用半经验电拓扑指数估算脂肪族有机化合物的辛醇/水分配系数

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A new possibility for estimating the octanol/water coefficient (log P) was investigated using only one descriptor, the semi-empirical electrotopological index (ISET). The predictability of four octanol/water partition coefficient (log P) calculation models was compared using a set of 131 aliphatic organic compounds from five different classes. Log P values were calculated employing atomic-contribution methods, as in the Ghose/Crippen approach and its later refinement, AlogP; using fragmental methods through the ClogP method; and employing an approach considering the whole molecule using topological indices with the MlogP method. The efficiency and the applicability of the ISET in terms of calculating log P were demonstrated through good statistical quality (r 0.99; s 0.18), high internal stability and good predictive ability for an external group of compounds in the same order as the widely used models based on the fragmental method, ClogP, and the atomic contribution method, AlogP, which are among the most used methods of predicting log P.
机译:仅使用一个描述符,即半经验电拓扑指数(I SET ),研究了估计辛醇/水系数(log P)的新可能性。使用一组来自五种不同类别的131种脂肪族有机化合物,比较了四种辛醇/水分配系数(log P)计算模型的可预测性。如Ghose / Crippen方法及其后来的改进AlogP所述,采用原子贡献方法计算Log P值。通过ClogP方法使用分段方法;并采用一种通过MlogP方法利用拓扑指数考虑整个分子的方法。 I SET 在计算log P方面的效率和适用性通过良好的统计质量(r> 0.99; s <0.18),较高的内部稳定性和对外部人群的良好预测能力得到证明。与基于碎片法ClogP和原子贡献法AlogP的广泛使用的模型的顺序相同的化合物,它们是最常用的预测log P的方法之一。

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