In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Unraveling the synthesis of homoleptic [Ag(N,N-diaryl-NHC)2]Y (Y = BF4, PF6) complexes by ball-milling, published in 2016, which mentions a compound: 286014-53-7, Name is 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate, Molecular C21H25BF4N2, Application of 286014-53-7.
A user-friendly and general mechanochem. method was developed to access rarely described NHC (N-heterocyclic carbene) silver(i) complexes featuring N,N-diarylimidazol(idin)ene ligands and non-coordinating tetrafluoroborate or hexafluorophosphate counter anions. Comparison with syntheses in solution clearly demonstrated the superiority of the ball-milling conditions.
In addition to the literature in the link below, there is a lot of literature about this compound(1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate)Application of 286014-53-7, illustrating the importance and wide applicability of this compound(286014-53-7).
Reference:
Bromide – Wikipedia,
bromide – Wiktionary