Kd. John et al., Chemistry of M(allyl)(3) (M = Rh, Ir) compounds: structural characterization of tris(allyl)iridium complexes with phosphorus ligands, CHEM COMMUN, (7), 2000, pp. 581-582
While addition of phosphorus ligands such as P(OPh)(3) to Rh(allyl)(3) give
s monovalent Rh(allyl)L-2, the iridium analog gives stable mixed sigma/pi-t
ris(allyl) complexes, as evidenced by the structural characterization of mo
no-, bi-, and tri-dentate ligand complexes.