X-Ray photoelectron and Mössbauer spectroscopy of triphenylphosphine–iridium complexes

Ir 4f core binding energies and 193Ir Mössbauer data have been recorded for a series of (PPh3)2Ir(CO)X-type complexes and found to be fairly insensitive to variation of X. The Ir 4f and N 1s photoelectron and Mössbauer spectroscopic results for several iridium–nitrosyl complexes containing iridium in different formal oxidation states with linear and bent Ir–N–O-groups are discussed.