Vibrational and electronic spectra of transition-metal carbonyl complexes. Part III. The infrared spectra of some carbonyl complexes containing metal–metal bonds

Abstract

Precise measurements of the i.r. spectra of a number of carbonyl complexes have been made. The complexes, which contain metal–metal bonds, are of two types: (i) LMn(CO)₅, LRe(CO)₅, and LCo(CO)₄, (where L = a metal system, e.g., Ph₃Sn or Ph₃PAu, and (ii) monosubstituted tertiary-phosphine derivatives of these complexes. The assignment of bands in the fundamental C–O stretching region has been based upon intensity and energy considerations together with binary combination data.