气相中的溶剂协调 [Mn. (H) 2O (n) 2+) 和 (Mn) 2O (n) 2+) 和 (Mn) 2O (n) 2+) 和 (Mn) 2O (n) 2O (n) 2+) 和 (Mn) 2O (n) 2O (n) 2+) 和
Hazel Cox1, Glen Akibo-Betts, Rossana R Wright
1School of Chemistry, Physics and Environmental Science, University of Sussex, Falmer, Brighton BN1 9QJ, U.K.
Journal of the American Chemical Society
|January 8, 2003
概括
含有四个水或酒精分子的复合体是稳定的,而酒精显示出更明显的碎片化模式. 计算证实了四面体结构,并揭示了二次溶解对离子的偏好.
科学领域:
- 无机化学 无机化学
- 计算化学的计算化学
- 生物化学 生物化学
背景情况:
- 离子在生物系统中起着至关重要的作用.
- 了解溶解是阐明其生物化学功能的关键.
- 金属离子与溶剂分子的协调化学是基本的.
研究的目的:
- 通过实验和计算来研究-水和-醇复合物的气相稳定性和碎片化.
- 确定这些综合体的首选协调号码和结构.
- 探索旋转状态对溶解的影响,并将研究结果与生物化学活动联系起来.
主要方法:
- 实验性气相质谱法用于研究碎片化模式和强度.
- 密度函数理论 (DFT) 计算以确定稳定的结构,结合能量和旋转状态.
- 对增量结合能量的分析,以了解溶解的形成.
主要成果:
- 稳定的[Mn. (H) 2O) 4) 2+) 和 (Mn. 确定了 (ROH) ((4)) ((2+) 复合物,其中的酒精有利于偏好的分裂.
- [Mn. 在线播放] (H) 2O) 4) 2+) 和 (Mn. (MeOH) ((4)) ((2+) 采用稳定的四面体结构.
- 计算表明,溶解偏好在四到五个分子之间,二级通过键形成.
- 的高旋转 (6) S基态最好地重现了实验观测.
结论:
- 对于具有有限的溶剂可用性,与生物化学系统相关的复合物,四面体协调是最受青的.
- 这项研究提供了对离子溶解行为的洞察,这对于理解其生物活性至关重要.
- 在生物系统中替代的能力是由它对四面体协调的偏好支持的.
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