Copper(II) complexes of pyridine-oxazoline (Pyox) ligands: Coordination chemistry, ligand stability, and catalysis
Copper(II) complexes of pyridine-oxazoline (Pyox) ligands: Coordination chemistry, ligand stability, and catalysis
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DOI：
10.1016/j.ica.2015.10.032
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发表时间：
2016-02-24
影响因子：
2.8
通讯作者：
Ward, Benjamin D.
中科院分区：
文献类型：
--
作者：
Hallett, Andrew J.;O'Brien, Thomas M.;Ward, Benjamin D.
研究了吡啶恶唑啉（Pyox）铜配合物的配位化学，考察了它们的催化性能。有趣的是，配位配体的稳定性已被证明比以前假设的要低得多：配体被偶然的水水解产生2-吡啶羧酸盐的形成，其将铜包封在二维配位聚合物3中。合成了配合物[Cu（R-Pyox）（NCMe）（2）（ClO_4）（2）] {R =苄基（Bn）_2a，苯基（Ph）_2b，异丙基（Pr_i）_2c}，并对其中的苄基衍生物进行了CW EPR谱分析。对配合物[Cu（Bn-Pyox）（NCMe）（2）（ClO_4）（2）]和上述配位聚合物进行了晶体学表征。研究了配合物2a-c在环己烯不对称烯丙基氧化反应中的催化性能。(C)2015作者由爱思唯尔公司出版
The coordination chemistry of copper(II) complexes bearing pyridine-oxazoline ("Pyox") ligands has been studied, with an aim of investigating their catalytic ability. Interestingly, the stability of the coordinated ligands has been shown to be much less than previously assumed: hydrolysis of the ligands by fortuitous water gives rise to 2-pyridine carboxylate formation, which encapsulate the copper in a two-dimensional coordination polymer 3. The complexes [Cu(R-Pyox)(NCMe)(2)(ClO4)(2)] {R = benzyl (Bn) 2a, phenyl (Ph) 2b, isopropyl (Pr-i) 2c} have been prepared, of which the benzyl derivative has been analysed by CW EPR spectroscopy. The complex [Cu(Bn-Pyox)(NCMe)(2)(ClO4)(2)] and the afore-mentioned coordination polymer have been crystallographically characterised. The performance of complexes 2a-c in the asymmetric allylic oxidation of cyclohexene is described. (C) 2015 The Authors. Published by Elsevier B.V.