在软供体溶剂中的化金属离子的协调化学
Kersti B Nilsson1,2, Mikhail Maliarik3,4, Ingmar Persson2
1Rejlers Sverige AB, Stationsgatan 12, SE-753 40 Uppsala, Sweden.
Molecules (Basel, Switzerland)
|August 14, 2025
概括
液体氨中的六胺溶盐 (III) 和 (III) 离子表现出正规的八面体结构. 氨胺溶解和水合金属离子之间的键距差与共价结合能力相关.
科学领域:
- 无机化学 无机化学
- 协调化学 协调化学
- 解决方案化学 解决方案化学
背景情况:
- 溶剂分子充当电子对捐赠者,与金属离子形成键.
- 金属-联体相互作用的性质 (共价与静电) 影响结构性质.
- 了解溶解结构对于预测溶液中的金属离子行为至关重要.
研究的目的:
- 为了确定液体氨中的六胺溶解 () 和 () 离子的结构.
- 为了比较含氨酸化离子与水合离子中的金属连接键距离.
- 为了研究金属离子特性和共价键贡献之间的关系.
主要方法:
- 扩展的X射线吸收细结构 (EXAFS) 谱学以确定复杂的结构.
- 205Tl核磁共振 (NMR) 光谱仪用于特 (III) 复合物的表征.
- 收集和分析各种金属离子溶解系统的现有结构数据.
主要成果:
- (III) 和 (III) 两种复合体都表现出正则的八面体协调几何.
- 平均In-N键距离为2.23(1) Å,而Tl-N键距离为2.29(2) Å.
- M-N 和 M-O 键距离的差异随着金属离子共价键结合能力的增加而减少.
结论:
- 液态氨,DMTF,和是强大的电子捐赠者,与金属离子形成共价键.
- 金属离子中的共价键的程度会影响M-N和M-O键距离之间的差异.
- 协应键索引与观察到的化和化金属离子的结构差异有很好的相关性.
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