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Cu~+ in Liquid Ammonia and in Water: Intermolecular Potential Function and Monte Carlo Simulation

机译:液氨和水中的Cu〜+:分子间势函数和蒙特卡罗模拟

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The solvation structure of Cu~+ in water and in liquid ammonia has been investigated using the Metropolis Monte Carlo method. The systems consisting of one Cu~+ in 215 solvent molecules have been simulated at a temperature of 240 K for ammonia and 298 K for water, respectively. Cu~+-ammonia and Cu~+-water pair potentials have been newly developed based on ab initio calculations of double-#zeta# quality. Structural properties were investigated by means of radial distribution functions and their running integration numbers, leading for the first solvation shell to an average coordination number 6 and Cu-N distance of 2.20 A in ammonia, and to number 6 and Cu-O distance of 2.20 A in water. The RDFs, coordination number distributions, and pair interaction energy distribution analyses indicate that ligand exchange reactions take place more easily in water than in liquid ammonia.
机译:利用Metropolis Monte Carlo方法研究了Cu〜+在水和液氨中的溶剂化结构。由215个溶剂分子中的一个Cu〜+组成的系统已分别在240 K的温度下对氨和298 K的温度下进行了模拟。基于双zeta#质量的从头算,新开发了Cu〜+氨和Cu〜+-水对电势。通过径向分布函数及其运行积分值研究了结构性能,导致第一个溶剂化壳在氨中的平均配位数为6,Cu-N距离为2.20 A,而配位数为6,Cu-O距离为2.20 A在水中。 RDF,配位数分布和对相互作用能分布分析表明,配体交换反应在水中比在液氨中更容易发生。

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