Diastereoselective Formation of Substituted (η3‐Allyl)(η4‐diene)ZrCp Complexes by Intramolecular Ligand Interaction

For the designed synthesis of transition-metal catalysts for organic reactions a detailed knowledge of the strong intramolecular interactions between the ligands in simple metal complexes is indispensable. In appropriately substituted allyl(diene)ZrCp complexes, such interactions lead to the formation of one isomer of the complex system with very high diastereoselectivity. Thus, the 55 :45 mixture of anti-2 and syn-2 rearranges thermally into >95% anti-1.