使用基于层次分子结构的方法来估计素/基替代基的物理化学性质
Yunzhi Ling1, Chao-Tun Cao1, Chenzhong Cao1
1Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
ACS omega
|February 9, 2026
概括
这项研究引入了素/基替代 (HCSA) 的新分子描述符,以准确预测诸如沸点等物理性质. 这些描述符可以对超过1000个HCSA属性进行可靠的估计,即使没有实验数据.
科学领域:
- 量化结构与财产关系 (QSPR)
- 计算化学计算化学
- 物理有机化学 有机化学
背景情况:
- 基/基替代 (HCSA) 是重要的化学化合物.
- 准确预测HCSA属性对于各种应用至关重要.
- 现有的方法可能对某些特性或化合物类缺乏足够的数据.
研究的目的:
- 为HCSAs开发新的分子描述器.
- 建立用于预测HCSA属性的定量相关方程.
- 为缺乏实验数据的HCSA属性提供准确的估计.
主要方法:
- 使用层次分子结构方法提取分子描述符.
- 开发特定类别和一般定量相关方程.
- 使用六个关键分子描述符计算属性:顶点数 (m),顶点数效应之和 (S_VNE),奇偶指数 (OEI),分子内极化效应指数 (IMPI),群的极化效应指数 (PEI) 和群影响因子 (Gn).
- 在一般方程中将功能组特征参数 (ΔP_X) 和电子负性 (χ_X) 纳入.
主要成果:
- 对于诸如沸点和折射率等属性,特定类别的方程实现了平均绝对百分比误差 (APPE) 低于1%的平均值.
- 对于临界温度和临界体积等属性的一般估计方程显示出很好的准确性,APPE值低于4%.
- 预测了1000多个HCSA属性,包括沸点,密度,折射率,临界温度,临界压力,形成的标准度和临界体积.
结论:
- 开发的分子描述符和定量相关方程为估计HCSA属性提供了一种新有效的方法.
- 这种方法显著提高了对缺乏实验数据的化合物预测性能的能力.
- 这项研究为涉及HCSA的计算化学和材料科学研究提供了有价值的工具.
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