Reference

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

All Rights Reserved. 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. Blue, Elizabeth D.; Gunnoe, T.Some commonly used reagents like 250285-32-6 and 878477-17-9 are used in this experiment. Brent; Petersen, Jeffrey L.; Boyle, Paul D. (Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA). Journal of Organometallic Chemistry, 691(26), 5988-5993 (English) 2006 Elsevier Ltd. CODEN: JORCAI. ISSN: 0022-328X. DOCUMENT TYPE: Journal CA Section: 29 (Organometallic and Organometalloidal Compounds) Section cross-reference(s): 28, 75, 78 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 CuI system depends upon the identity of the two counterions (chloride or triflate). The copper complexes [(IPrH)Cu(OTf)(m-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. .