Title: The absorption and magnetic circular dichroism spectra of matrix-isolated Os18O4 and Os16O4
Abstract: Matrix absorption and magnetic circular dichroism studies on Os16O4 and Os18O4 have been carried out to clarify the number of electronic transitions present in the region. The spectra show that the irregular vibrational structure in the 16O species with its onset at ∼276 nm is perfectly regular in the 18O compound. The system is, therefore, interpreted as a single electronic system analogous to that observed in the permanganate ion. The Raman spectrum of Os16O4 single crystal has also been obtained.