一个分子静电电位键关键点模型,用于原子和组电子阴性
Cherumuttathu H Suresh1, Nobuaki Koga
1Contribution from the Graduate School of Human Informatics, Nagoya University, Chikusa-ku, 464-8601, Nagoya, Japan.
Journal of the American Chemical Society
|February 21, 2002
概括
一种新的方法使用分子静电潜能来确定元素的原子负电子. 这种方法提供了一种一致而准确的尺度,特别是对于过渡元素,并评估组电子负性.
科学领域:
- 量子化学 是一个量子化学.
- 物理化学 物理化学
- 定期趋势 周期性趋势
背景情况:
- 电子阴性是一种影响分子行为的基本化学性质.
- 现有的电子阴性度量表显示了变化,特别是对于过渡元素.
- 一个一致而准确的尺度对于预测化学至关重要.
研究的目的:
- 开发一种新的,一致的原子电子负性尺度.
- 准确确定主块和d块过渡元件的电子负性.
- 通过使用统一的方法来评估组电子负性.
主要方法:
- 使用分子静电电位 (MEP) 在甲基元素化物系统中C-E键的结合关键点 (H) (C-EH) (n)).
- 分析MEP债券的位置和价值至关重要点,以导出电子阴性值.
- 扩展该方法,通过用其他组替换气来计算组电子负性.
主要成果:
- 为主块和d块元素建立了一个新的,一致的原子负电子度量表.
- 衍生出的尺度表现出与保林和穆利肯等既定尺度有很强的一致性,特别是在主要块元素方面.
- 由于采用了更严格的方法,新尺度预计将为过渡元的电子负性提供更好的准确性.
- 评估的组电子阴性与伊纳莫托和穆莱尺度有很好的相关性.
结论:
- 基于MEP的方法提供了一种可靠和一致的方法来确定原子和组电子阴性.
- 这种新的尺度为理解和预测化学性质提供了有价值的工具,特别是对于过渡金属.
- 一致的方法提高了电子阴性度表在化学研究中的准确性和适用性.
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