Recommanded Product: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate, is researched, Molecular C21H25BF4N2, CAS is 286014-53-7, about Cu(0), O2 and mechanical forces: a saving combination for efficient production of Cu-NHC complexes. Author is Beillard, Audrey; Metro, Thomas-Xavier; Bantreil, Xavier; Martinez, Jean; Lamaty, Frederic.
Mech. forces induced by ball-milling agitation enabled the highly efficient and widely applicable synthesis of Cu-carbene complexes from N,N-diaryl-imidazolium salts and metallic Cu. The required amount of gaseous dioxygen and insoluble Cu could be reduced down to stoichiometric quantities, while reaction rates clearly outperformed those obtained in solution Use of Cu(0) as the Cu source enabled the application of this approach to a wide array of N,N-diaryl-imidazolium salts (Cl-, BF4- and PF6-) that transferred their counteranion directly to the organometallic complexes. Cu-NHC complexes could be produced in excellent yields, including use of highly challenging substrates. Five unprecedented organometallic complexes are reported.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary