Carbenerhodium Complexes with Diaryl‐ and Aryl(alkyl)carbenes as Ligands: The Missing Link in the Series of the Double Bond Systems trans‐[RhCl{ C(C)nRR′}(L)₂] Where n 0, 1, and 2

That compounds bearing homologous ligands—here PiPr3 and SbiPr3—can behave differently is underlined by the synthesis of the first carbenerhodium(i) complexes in which the carbene is not stabilized by a heteroatom. Compound 1 (characterized by X-ray structural analysis) undergoes a variety of interesting ligand displacement reactions, giving, for example, 2 (L  SbiPr3, CO, CNtBu) and 3. Diphenylketene is obtained by coupling of the carbene ligand with CO.