Potential constants of Co(CO)3NO from vibrational spectra of six isotopic species

摘要

Infrared and Raman spectra are reported forColpar;12C16Orpar;314N16O,Colpar;12C16Orpar;315N18O,Colpar;12C18Orpar;314N16O,Colpar;12C18Orpar;315N18O,Colpar;13C16Orpar;314N16O, andColpar;13C16Orpar;315N18O. All fundamentals have been assigned and anharmonicity corrections have been estimated for the Csngbnd;O and Nsngbnd;O stretching frequencies. General quadratic potential constants have been calculated by constraining many of the interaction constants to values estimated from analogous constants of nickel carbonyl. Compared withNilpar;COrpar;4,Colpar;COrpar;3NOexhibits slightly stronger backbonding of the metaldelectrons to the carbonyl group. The NO, CoN interaction is surprisingly small, indicating that the effects of changes in pi backbonding and in Cosngbnd;N sigma bonding nearly cancel each other.