The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Stabilisation of gold nanoparticles by N-heterocyclic thiones》. Authors are Moraes, Leonardo C.; Lacroix, Bertrand; Figueiredo, Rute C.; Lara, Patricia; Rojo, Javier; Conejero, Salvador.The article about the compound:1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroboratecas:286014-53-7,SMILESS:CC1=C([N+]2=CN(C3=C(C)C=C(C)C=C3C)C=C2)C(C)=CC(C)=C1.F[B-](F)(F)F).Safety of 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate. Through the article, more information about this compound (cas:286014-53-7) is conveyed.
Gold nanoparticles (Au-NPs) have been prepared using N-heterocyclic thiones (NHTs) as ligand stabilizers. These Au-NPs were very stable, even in air, and were characterized by a combination of several techniques (TEM, HR-TEM, STEM-HAADF, EDX, DLS, elemental anal. and 1H NMR). These nanoparticles are active in the catalytic reduction of nitroarenestoanilines.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary