A modified plastic cluster model for the interpretation of the ν(MM) spectra of some bridged Os3 carbonyl clusters

The ν(MM) Raman spectra of some twenty doubly bridged Os3 carbonyl clusters are interpreted using a new model in which the mass of all the ligands is incorporated. The frequencies are fitted remarkably well; the average standard deviation is 2.1 cm−1. The data from the model seems to have some physical reality in that when applied to the calculation of some structural parameters (OsOs distance and OsOsOs angle) it gives reasonable results.