Optimizing Alkali Metal (M) and Chelate (L) Combinations for the Synthesis and Stability of [M(L)][(C 5 H 4 SiMe 3 ) 3 Y] Yttrium(II) Complexes
Optimizing Alkali Metal (M) and Chelate (L) Combinations for the Synthesis and Stability of [M(L)][(C 5 H 4 SiMe 3 ) 3 Y] Yttrium(II) Complexes
复制标题
优化碱金属 (M) 和螯合物 (L) 组合以促进 [M(L)][(C 5 H 4 SiMe 3 ) 3 Y] 钇(II) 配合物的合成和稳定性
DOI：
10.1021/acs.organomet.1c00379
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发表时间：
2021
期刊：
影响因子：
2.8
通讯作者：
Evans, William J.
中科院分区：
文献类型：
--
作者：
Moore, William N.;Ziller, Joseph W.;Evans, William J.
为了优化影响[M(L)][Cp‘3YII]配合物(Cp’=C5H4SiMe3)生成和稳定性的因素，考察了9种不同的碱金属组合(M=Li、Na、K、Rb、Cs)和络合剂(L=2.2.2-密码、18-冠-6和二苯并-18-冠-6)对Cp‘3YII的还原作用。通过采集一段时间的UV-Vis光谱，监测了每个[M(L)][Cp‘3YII]产物在四氢呋喃中的室温热分解过程，并对其分解曲线进行了比较。最稳定的M/L组合是[K(CRYT)][CP‘3YII]，在80 mM浓度下分解1/2≈71±7min。生成[K(18-冠-6)][Cp‘3YII]的还原反应可以通过添加汞生成起始原料Cp’3YIII和18-冠-6以及钾汞齐来完全逆转。
To optimize the factors affecting the generation and stability of [M(L)][Cp′3YII] complexes (Cp′ = C5H4SiMe3), reductions of Cp′3YIIIwith nine different combinations of alkali metals (M = Li, Na, K, Rb, Cs) and chelating agents (L = 2.2.2-cryptand, 18-crown-6, and dibenzo-18-crown-6) have been examined. The thermal decomposition of each [M(L)][Cp′3YII] product in THF at room temperature was monitored via UV–vis spectra collected over time, and the decomposition profiles were compared. The most stable M/L combination was found to be [K(crypt)][Cp′3YII] with a decompositiont1/2≈ 71 ± 7 min at an 80 mM concentration. The reduction reaction that generates [K(18-crown-6)][Cp′3YII] can be cleanly reversed by addition of Hg to generate the starting materials, Cp′3YIIIand 18-crown-6, and potassium mercury amalgam.