Protonation of N-heterocyclic carbene ligand coordinated to copper(I):: Coordination mode of imidazolium cation as a function of counterion as determined by solid-state structures
Protonation of N-heterocyclic carbene ligand coordinated to copper(I):: Coordination mode of imidazolium cation as a function of counterion as determined by solid-state structures
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DOI：
10.1016/j.jorganchem.2006.09.051
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发表时间：
2006-12-15
影响因子：
2.3
通讯作者：
Boyle, Paul D.
中科院分区：
文献类型：
--
作者：
Blue, Elizabeth D.;Gunnoe, T. Brent;Boyle, Paul D.
（IPr）Cu（X）（X = Cl或三氟甲磺酸盐，IPr = 1，3-双（2，6-二异丙基苯基）咪唑-2-亚基）配合物与强酸HOTf或HCl的反应导致IPr配体的C2碳质子化以形成咪唑鎓阳离子。咪唑鎓与所得Cu I系统的配位取决于两个抗衡离子（氯离子或三氟甲磺酸根）的身份。通过核磁共振谱和单晶X射线衍射研究了铜配合物[（IPrH）Cu（OTf）（mu-OTf）]（2）和[IPrH][CuCl_2]以及咪唑盐[IPrH][OTf]的结构。(c)2006 Elsevier B. V.保留所有权利。
Reactions of (IPr)Cu(X) (X = Cl or trifluoromethanesulfonate, IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) complexes with the strong acids HOTf or HCl result in protonation of the C2 carbon of the IPr ligand to form imidazolium cations. Coordination of the imidazolium to the resulting Cu I system depends upon the identity of the two counterions (chloride or triflate). The copper complexes [(IPrH)Cu(OTf)(mu-OTf)](2) and [IPrH][CuCl2] as well as the imidazolium salt [IPrH][OTf] have been characterized by NMR spectroscopy and single crystal X-ray diffraction studies. (c) 2006 Elsevier B.V. All rights reserved.