Two N-alkyloxy-N′-phenylimidazolium proligands and the corresponding platinum(ii) cyclometalated N-alkyloxyimidazol-2-ylidene complexes with β-diketonate auxiliary ligands, [(C_NOHC^C*)Pt(L∩L)] (L∩L = acetyacetonate (acac) or 1,3-bis(2,4,6-trimethylphenyl)-propane-1,3-dionato (mesacac)) were synthesized and fully characterized. In addition, a Au(i) monocarbene complex was synthesized, isolated and characterized. Solid-state structures of two cyclometalated platinum(ii) NOHC complexes and the Au(i) NOHC complex were obtained providing structural proof.