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Keywords:

  • cerium;
  • crystal structure;
  • density functional calculations;
  • multiple bonds

Abstract

Whereas terminal oxo complexes of transition and actinide elements are well documented, analogous lanthanide complexes have not been reported to date. Herein, we report the synthesis and structure of a cerium(IV) oxo complex, [Ce[DOUBLE BOND]O(LOEt)2(H2O)]⋅MeC(O)NH2 (1; LOEt=[Co(η5-C5H5){P(O)(OEt)2}3]), featuring a short Ce[DOUBLE BOND]O bond (1.857(3) Å). DFT calculations indicate that the hydrogen bond to cocrystallized acetamide plays a key role in stabilizing the Ce[DOUBLE BOND]O moiety of 1 in the solid state. Complex 1 exhibits oxidizing and nucleophilic reactivity.