Pushing the known limits of lanthanide oxidation, chemists have isolated praseodymium (Pr) in the +5 oxidation state. While Pr 5+ compounds have been observed in the gas phase and in noble gas matrix ...

Chemists have discovered a new oxidation state of rhodium. This chemical element is one of the most catalytically important platinum-group metals and is used, for example, in catalytic converters for ...