Synthesis, Structure, and Solution Dynamics of Pentamethylcyclopentadienyl Nickel Complexes Bearing N-Heterocyclic Carbene Ligands
Synthesis, Structure, and Solution Dynamics of Pentamethylcyclopentadienyl Nickel Complexes Bearing N-Heterocyclic Carbene Ligands
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带有N-杂环卡宾配体的五甲基环戊二烯基镍配合物的合成、结构和溶液动力学
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Chetcuti
中科院分区：
文献类型：
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作者：
V. Ritleng;C. Barth;E. Brenner;Sandra Milosevic;M. Chetcuti
通式为[Ni（NHC）X]的中性五甲基四氢镍配合物（η5-C5 Me 5）] [NHC = 1，3-二甲基咪唑-2-亚基（Me-NHC），1，3-双（2，4，6，-trimethylphenyl）imidazole-2-ylidene（Mes-NHC），1，3-bis（2，6-二异丙基苯基）咪唑-2-亚基（iPr-NHC）; X = Cl，I]由五甲基溴乙酰丙酮合镍（II）与1当量相应的咪唑盐（NHC·HX）反应制得。新的配合物[Ni（Me-NHC）I（η5-C5 Me 5）] 1a、[Ni（Mes-NHC）Cl（η5-C5 Me 5）] 2和[Ni（iPr-NHC）Cl（η5-C5 Me 5）] 3以中等至良好的产率获得，并且通过13 C和1H NMR光谱进行充分表征，并且在1a和2的情况下通过单晶X射线晶体学进行表征。还合成了相关的双金属配合物[Ni（Me-NHC）I（η5-C5 H5）] 1b，并对其结构进行了表征;其几何构型和光谱数据与配合物1a相当。空间受限配合物2和3的变温1H NMR谱与限制性核磁共振谱一致。
Neutral pentamethylcyclopentadienyl nickel complexes of general formula [Ni(NHC)X(η5-C5Me5)] [NHC = 1,3-dimethylimidazol-2-ylidene (Me-NHC), 1,3-bis(2,4,6,-trimethylphenyl)imidazol-2-ylidene (Mes-NHC), 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (iPr-NHC); X = Cl, I] were prepared from the reaction of pentamethylcyclopentadienyl acetylacetonate nickel(II) with 1 equiv of the corresponding imidazolium salt (NHC·HX). The new complexes [Ni(Me-NHC)I(η5-C5Me5)] 1a, [Ni(Mes-NHC)Cl(η5-C5Me5)] 2, and [Ni(iPr-NHC)Cl(η5-C5Me5)] 3 were obtained in moderate to good yields and were fully characterized by 13C and 1H NMR spectroscopy, and in the cases of 1a and 2 by single-crystal X-ray crystallography. The related cyclopentadienyl complex [Ni(Me-NHC)I(η5-C5H5)] 1b was also synthesized and structurally characterized; its geometry and spectroscopic data are comparable to those of complex 1a. The variable-temperature (VT) 1H NMR spectra of the sterically constrained complexes 2 and 3 are consistent with restricted ro...
影响因子：
15
作者：
Ng, SS;Jamison, TF
通讯作者：
Jamison, TF