Heterocyclen als Liganden, X 2,2′,5,5′‐Tetra‐tert‐butyl‐1,1′‐diazaferrocen — Stabilisierung der Diheterometallocen‐Struktur durch sterische Abschirmung

Heterocycles as Ligands, X1). — 2,2′,5,5′‐Tetra‐tert‐butyl‐1,1′‐diazaferrocene – Stabilization of the Diheterometallocene Structure by Steric Shielding Stable 2,2′,5,5′‐tetra‐tert‐butyl‐1,1′‐diazaferrocene (3) is obtained by the reaction of the corresponding lithiopyrrole with FeCl2. The X‐ray analysis reveals a distorted sandwich structure influenced by repulsive interactions presumably both between the nitrogen atoms and the bulky tert‐butyl substituents.