Chemical generation of the ammoniated electro via ytterbium(II)
Chemical generation of the ammoniated electro via ytterbium(II)
复制标题
通过镱(II)化学生成氨化电子
DOI：
10.1021/ja01009a065
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发表时间：
1968
影响因子：
15
通讯作者：
J. C. Warf
中科院分区：
文献类型：
--
作者：
S. Salot;J. C. Warf
Ln（en）_3（NO_3）_3化合物的红外光谱表明存在（C_2v）硝酸根配位基团，Ln（en）_4（NO_3）_3化合物的红外光谱表明存在离子（D_3h）基团。乙二胺取代硝酸根离子的能力和至少八配位的Ln ~（5+）的存在都表明了配合物的存在。通过对逐步生成过程的量热分析，证明了Ln（en）_n ~（5+）（n =1-4）在乙腈溶液中的热力学稳定性。当配体加入到镧系元素盐的溶液中时，可观察到四种不同的焓变。由焓变与配体与金属离子摩尔比的关系曲线，计算了各物种在溶液中的稳定性。4高氯酸钕体系的生成比（）和生成常数（Kn）的典型值总结在表I中。
The infrared spectra of the Ln (en) 3 (N03) 3 compounds indicate clearly thepresence of coordinated (C2v) ni-trate groups; those of the Ln (en) 4 (N03) 3 compounds indicate thepresence of ionic (D3h) groups. Both the ability of ethylenediamine to replace nitrate ion in the coordination sphere and the presence of at least eightcoordinate Ln5+ are indicated. Calorimetric evaluation of the stepwise enthalpies of formation has demonstrated the thermodynamic sta-bilities of the species Ln (en)„5+(«=1-4) in acetonitrile solution. Four distinct enthalpy changes are observable as the ligand is added to a solution of the lanthanide salt. From plots of enthalpy change vs. ligand to metal ion mole ratio, stabilities of the species in solu-tion were calculated. 4 Typical values for enthalpies of formation () and formation constants (Kn) are summarized for the neodymium perchlorate system in Table I.