An Oxocobalt(IV) Complex Stabilized by Lewis Acid Interactions with Scandium(III) Ions


  • We gratefully acknowledge financial support of this work from the Cluster of Excellence “Unifying Concepts in Catalysis” (EXC 314/1), Berlin. We thank F. Schäfers and M. Mertin (beamline KMC-1, BESSY, Berlin) for technical support. We are also grateful to Prof. P. Hildebrandt, Prof. C. Limberg, and Dr. U. Kuhlmann for helpful discussions.


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An elusiveS=3/2 oxocobalt(IV) complex is stabilized by a Lewis acid interaction with a scandium(III) ion. The {CoIV-O-Sc}3+ unit, characterized by spectroscopic and DFT methods, is a stronger electron-transfer and H-atom abstraction agent but weaker oxo-transfer agent than the corresponding {FeIV[DOUBLE BOND]O} complex (see scheme; L=tris[2-(N-tetramethylguanidyl)ethyl]amine).