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Updated: May 17, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
1-Butyl-3-ethyl-1H-benzimidazol-3-ium tetra-fluoro-borate
Denise M Junge1, Derek R Scadova, James A Golen
1Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
Abstract:
In the title salt, C(13)H(19)N(2) (+)·BF(4) (-), an ionic liquid, the butyl and ethyl substituents bonded to the N atoms of the imidazole ring [r.m.s. deviation = 0.019 (1) Å] adopt equatorial positions. The crystal structure exhibits slipped π-π inter-actions between the imidazole and benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.529 (2) Å]. In the tetra-fluoro-borate anion, the B and F atoms are disordered over two sets of sites with site-occupancy factors of 0.813 (7) and 0.187 (7).
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