Iridium (Iii) –Hydridocyclometallated-Imine Complexes, As A Result Of C-H Bond Activation In Coordinated Ligand, Spectroscopic Studies

I.R., 1H and 31P NMR spectra of the solution of [IrHCl (X-benzylidene) (Y-pyridine) (PPh3)2] and [IrHCl(X-benzylidene) (Y-thiazole) ((PPh3)2] in CDCl3 show that the hydride resonances absorb in the range of δ(-) 14.60 – (-) 15.04 ppm for pyridines complexes and in the range of δ (-) 15.46 – (-) 19.98 ppm for imidazole’s complexes. The hydride complexes formation strongly suggest that oxidative addition of CH=N to iridium take place by =C-H bond activation of the imine ligand. The disposition of the hydride ligand was inferred as trans to a N-donor ligand. The 31P-chemical shifts for the phosphorous atom bonded to Ir falls in the range of δ13.20 – 16.14 ppm.