(4-Benzyl-1-methyl-1,2,4-triazol-5-yl-idene)[(1,2,5,6-η)-cyclo-octa-1,5-diene](tri-phenyl-phosphane-κ)iridium(I) tetra-fluorido-borate.

A new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetra-fluorido-borate counter-anion, [Ir(CHN)(CH)(CHP)]BF, has been synthesized and structurally characterized. The cationic complex exhibits a distorted square-planar environment around the Ir ion. One significant non-standard hydrogen-bonding inter-action exists between a hydrogen atom on the N-heterocyclic carbene ligand and a fluorine atom from the counter-ion, BF .