“…There are only a handful of examples of fast vibrational energy transfer between the carbonyl vibrations of organometallic complexes in the literature [194,230,244,254,[257][258][259]. A rigorously documented example is Rh(CO) 2 (acac) (RDC; acac = C 5 H 7 O 2 ) which has been studied with ultrafast spectroscopy by several groups [194,230,244,259].…”