高氧化状态的水解反应的次数是Th2O4,Pa2O5,U2O6,以及Np2O6. 一个计算研究
Eddy M Lontchi1, Monica Vasiliu1, David A Dixon1
1Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States.
这项研究计算了二次性乙烯酸氧化物的水解能量. 的水解是外热的,而和海王星更喜欢水解而不是水解,形成稳定的水合物种.
科学领域:
- 无机化学 无机化学
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 动氨酸氧化物在核燃料循环和废物管理中至关重要.
- 了解它们的水解是预测它们在水环境中的行为的关键.
- 活性化物的高氧化状态带来了独特的化学挑战.
研究的目的:
- 通过计算来研究二度性动因化物种的水解能量:Th2IV O4,Pa2V O5,U2VI O6和Np2VI O6.
- 为了阐明水解和水合的活性化物产品的反应途径和稳定性.
- 为了比较不同活性化物元素和氧化状态的水解行为.
主要方法:
- 高级量子化学计算,包括合集群单双与扰乱理论 (CCSD(T)) 和B3LYP函数.
- 通过顺序的易斯酸/基 adduct 形成和质子转移,模拟水解.
- 对反应能量的分析,首选的水解点 (终端与桥梁氧基) 和产品稳定性的分析.
主要成果:
- (Th2O4) 水解是外热的,有利于质子转移到终端氧基,形成稳定的Th2 (OH) 8.
- (Pa2O5) 的水解产生类似能量的异构体;Pa2O (OH) 8 (H2O) 是最稳定的物种.
- (U2O6) 和海 (Np2O6) 的水解主要发生在桥接氧气中,水合产品比水解产品更稳定.
结论:
- 水解机制和能量在各个活性元素和氧化状态之间有很大差异.
- 具有容易和外热水解,而和海王星由于强烈的乙烯基键有利于水解.
- 计算能量学为行动类物种的环境命运和化学行为提供了关键的见解.
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