Synthesis, characterization, and electrochemical properties of μ-oxalate bridged vanadium(III) and (IV) dimers incorporating the Kläui ligand, CpPORCo (R = Me, Et)

•Oxalate bridged vanadium(IV) dimers were synthesized and characterized.•Electrochemical analysis of oxalate bridged vanadium(IV/IV) and (III/IV) dimers.•X-ray crystallographic studies of novel vanadium(IV/IV) and (III/IV) dimers.•NMR and EPR studies of novel vanadium(IV/IV) and (III/IV) dimers were conducted.•Novel vanadium(IV/IV) and (III/IV) dimers have potential as oxidation catalysts.

Three novel dimeric vanadium μ-oxalate bridged complexes bearing methoxy (R = OMe) and ethoxy (R = OEt) versions of the CpPORCo− (η5-cyclopentadienyltris-(dialkylphosphito-κ1P) cobaltate(III), Kläui) ligand have been synthesized and presented along with previously synthesized complexes. Of specific interest are the dimeric vanadium(IV) complexes of each, [(CpPORCo)VO]2(μ-O4C2). The complexes were characterized via magnetic, spectral, and X-ray diffraction studies with a focus on electrochemical analysis.

Graphical abstractSeveral dimeric vanadium μ-oxalate bridged complexes bearing methoxy (R = OMe) and ethoxy (R = OEt) versions of the η5-cyclopentadienyltris-(dialkylphosphito-κ1P) colbaltate(III) ligand have been synthesized. Of specific interest are the dimeric vanadium(IV) complexes of each, [(CpPORCo)VO]2(μ-O4C2). The complexes were characterized via magnetic, spectral, and X-ray diffraction studies.Figure optionsDownload full-size imageDownload as PowerPoint slide