Addition of alkynes at bridging vinyliminium ligands in diiron complexes: Unprecedented diene formation by enyne-like metathesis

► C-C and C-heteroatom bond formation promoted by diiron complexes. ► Assembly and incorporation of alkynes into a bridging ligand. ► Enyne metathesis and cycloaddition at bridging vinyliminium ligands in diiron complexes.