Nature | Chemistry
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Praseodymium in the formal +5 oxidation state
The most common oxidation state for lanthanide elements is +3, and, beyond cerium, examples of these elements exhibiting higher oxidation states remain scarce. Now, a molecular complex of praseodymium in the +5 oxidation state has been synthesized; this compound exhibits a unique electronic structure driven by N 2p and Pr 4f orbital contributions.