CnRn Carbocyclic Polyene Ligands

When the remaining co-ligands differ markedly in their trans influences, e.g. oxo and imido co-ligands, the ring may tilt on the metal-centroid axis. 

Before we consider each of these ligands in turn, it is useful to identify parallels, which run through the chapter and characterize all the tj -CRn ligands. These may be generalized as in Box 7.1. 

---