Odd-Numbered Ring Cluster Tc9(μ-O)9Cl6(OOCCCl3)15: Synthesis, Crystal Structure, and Optical and Thermal Properties | Inorganic Chemistry pubs.acs.org/doi/10.1021/... Volkov, Grigoriev and Abkhalimov @InorgChem #technitium #Tc9 #wheel #cluster #intermediate_oxidation_state