[2-Butyl-4-(4-tert-butyl­benz­yl)-1,2,4-triazol-3-yl­idene]chlorido[(1,2,5,6-η)-cyclo­octa-1,5-diene]iridium(I)

In the title compound, [IrCl(C₈H₁₂)(C₁₇H₂₅N₃)], the Ir^I ion has a distorted square-planar coordination geometry. The N-heterocyclic carbene ligand has an extended S-shaped conformation. The butyl group was refined using a two-part 1:1 disorder model. In the crystal, three unique weak C—H...Cl contacts are present. Two of these form a motif described as R₂¹(6) in graph-set notation, while a third forms an R₂²(8) motif about a crystallographic inversion center. The result is a chain structure which extends parallel to the crystallographic a axis.