Synthesis and crystal structure of [1,3-bis-(2,6-diiso-propyl-phen-yl)imidazol-2-yl-idene](iso-cyanato-κ N)gold(I)

Abstract

The title complex, [Au(NCO)(C₂₇H₃₆N₂)], was synthesized by ligand metathesis from [1,3-bis-(2,6-diiso-propyl-phen-yl)imidazol-2-yl-idene]gold(I) chloride and sodium cyanate in anhydrous tetra-hydro-furan and crystallized from toluene at 233 K in the ortho-rhom-bic space group P2₁2₁2₁, as a neutral complex with the central Au atom di-coordinated by an N-heterocyclic carbene [Au-C = 1.963 (2) Å] and an iso-cyanate [Au-N 1.999 (2) Å] ligands, with a linear CAuNCO moiety. The crystal packing is consolidated by C-H⋯O hydrogen bonds.

Keywords: N-heterocyclic carbene; crystal structure; gold(I); iso­cyanate.