A MODIFIES PLASTIC CLUSTER MODEL FOR THE INTERPRETATION OF THE (M-M) SPECTRA OF SOME BRIDGED OS3 CARBONYL CLUSTERS

The (MM) 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 (OsOs distance and OsOsOs angle) it gives reasonable results