在不寻常的分子I:平面六坐标碳原子中的结合图案的分析:平面六坐标碳原子
Daniel Del Angel Cruz1, Katherine N Ferreras1, Taylor Harville1
1Department of Chemistry and Ames National Laboratory, Iowa State University, Ames, Iowa, 50011, USA. mark@si.msg.chem.iastate.edu.
Physical chemistry chemical physics : PCCP
|July 30, 2024
概括
对CO3Li3+和CS3Li3+的研究表明,由于反向键极性和可能的C-Li吸引,只有CS3Li3+表现出平面六坐标碳 (phC) 系统的特征,而不是CO3Li3+表现出C-Li排斥.
科学领域:
- * 计算化学 计算机化学
- * * 量子化学 量子化学
- * 材料科学 材料科学
背景情况:
- * 研究新的结合结构对于促进化学理解至关重要.
- * 平面六坐标碳 (phC) 系统代表了一种异国情调的结合动机.
- * 了解金属离子对分子结构的影响是关键.
研究的目的:
- *分析CO3Li3+和CS3Li3+的结合结构.
- * 确定这些分子作为平面六坐标碳 (phC) 系统的可行性.
- * 为了比较电子性质和粘合特性与CH3Li和CO3等参考分子的电子性质和粘合特性.
主要方法:
- *利用定向准原子轨道 (QUAO) 来研究结合.
- *从QUAO群体计算了部分电荷,以分析电荷分布.
- *使用参考分子 (CH3Li,CO3(2-)) 进行比较分析.
主要成果:
- * +离子显著影响CO3Li3+中氧原子的轨道结构.
- *CO3Li3+由于正的部分电荷而表现出C和Li原子之间的排斥.
- *与CO3Li3+相比,CS3Li3+显示了碳-素σ键的逆极性,可能有C-Li的吸引力.
- *CO3Li3+和CS3Li3+中的C-Li共价相互作用分别为CH3Li中的14%和6%.
结论:
- *只有CS3Li3+可以被认为是平面六坐标碳 (phC) 系统.
- *将O原子替换为S原子反转了C-素 σ键的极性.
- *元素电子负性不能完全解释观察到的CSσ键极性;QUAO分析是必不可少的.
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