Stable bis(trifluoromethyl)nickel(III) complexes.

Stable bis(trifluoromethyl)nickel(III) complexes.
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稳定的双(三氟甲基)镍(III)络合物。

DOI:
10.1039/c4cc09594d
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发表时间:
2015
影响因子:
4.9
通讯作者:
Liviu M. Mirica
Liviu M. Mirica
中科院分区:
化学2区
文献类型:
--
作者:
Fengzhi Tang;N. Rath;Liviu M. Mirica

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在几种镍催化的交叉偶联反应中已经提出了有机金属Ni(III)中间体,但迄今为止还没有报道分离的双(烃基)Ni(III)配合物。本文中,我们报告了稳定的有机金属Ni(III)配合物的合成和详细表征,该配合物含有两个三氟甲基配体,并由四齿N-供体配体(R)N4(R = Me或tBu)支撑。有趣的是,相应的Ni(II)前体经历容易的氧化,包括有氧氧化,以产生不常见的稳定的有机金属Ni(III)络合物,其表现出有限的反应性。
Organometallic Ni(III) intermediates have been proposed in several Nickel-catalyzed cross-coupling reactions, yet no isolated bis(hydrocarbyl)Ni(III) complexes have been reported to date. Herein we report the synthesis and detailed characterization of stable organometallic Ni(III) complexes that contain two trifluoromethyl ligands and are supported by tetradentate N-donor ligands (R)N4 (R = Me or tBu). Interestingly, the corresponding Ni(II) precursors undergo facile oxidation, including aerobic oxidation, to generate uncommonly stable organometallic Ni(III) complexes that exhibit limited reactivity.
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