Correction to “Synthesis and Reactivity of (N2P2)Ni Complexes Stabilized by a Diphosphonite Pyridinophane Ligand”
Correction to “Synthesis and Reactivity of (N2P2)Ni Complexes Stabilized by a Diphosphonite Pyridinophane Ligand”
复制标题
修正“二亚膦酸酯吡啶芬配体稳定的 (N2P2)Ni 配合物的合成和反应性”
DOI：
10.1021/acs.organomet.1c00548
复制
发表时间：
2021
期刊：
影响因子：
2.8
通讯作者：
Mirica, Liviu M.
中科院分区：
文献类型：
--
作者：
Fuchigami, Kei;Watson, Michael B.;Tran, Giang N.;Rath, Nigam P.;Mirica, Liviu M.
合成并表征了一系列含两个亚膦酸基的四齿吡啶并[3.3]（2，6）吡啶并[3.3]膦稳定的（N2 P2）Ni Ⅱ配合物（N2 P2 =P，P '-ditterbutyl-2，11-diphosphonito[3.3]（2，6）pyridinophane）.循环伏安法（CV）研究表明，在中等氧化还原电位下，这些NiII络合物可达到NiI氧化态，原位EPR、低温UV-vis和电化学研究表明，在NiII前体还原过程中，NiI物种的形成。此外，[（N2 P2）NiI（CNT-Bu）]（SbF 6）配合物分离后，还原的Ni II前体与1 equiv的CoCp 2，并通过EPR和X射线光电子能谱（XPS）进行了表征。最后，（N2 P2）NiIIBr 2配合物作为一个有效的催化剂Kumada交叉偶联的芳基卤与芳基或烷基格氏，这表明N2 P2配体可以支持各种镍物种参与催化C-C键形成反应。
A series of (N2P2)NiIIcomplexes (N2P2 =P,P′-ditertbutyl-2,11-diphosphonito[3.3](2,6)pyridinophane) stabilized by a modified tetradentate pyridinophane ligand containing two phosphonite groups were synthesized and characterized. Cyclic voltammetry (CV) studies revealed the accessibility of the NiIoxidation state at moderate redox potentials for these NiIIcomplexes.In situEPR, low-temperature UV–vis, and electrochemical studies were employed to detect the formation of NiIspecies during the reduction of NiIIprecursors. Furthermore, the [(N2P2)NiI(CNt-Bu)](SbF6) complex was isolated upon reduction of the NiIIprecursor with 1 equiv of CoCp2and was characterized by EPR and X-ray photoelectron spectroscopy (XPS). Finally, the (N2P2)NiIIBr2complex acts as an efficient catalyst for the Kumada cross-coupling of an aryl halide with an aryl or alkyl Grignard, suggesting that the N2P2 ligand can support the various Ni species involved in the catalytic C–C bond formation reactivity.