A series of dinuclear organophosphorus-bridged complexes of the general formula {(LVO(μ-O(2)PRR')}(2) [L = η(5)-cyclopentadienyltris(diethylphosphito-κ(1)P) cobaltate(III)] has been synthesized as a structural model for the industrially used vanadium phosphate oxidation catalysts. These dimeric species contain two vanadium centers in a VO(6) environment bridged by O-P-O units. These complexes have been characterized via spectral and magnetic analyses. Structural parameters have been analyzed through X-ray diffraction. The dimers generally exist in either a cis/cis-anti or retracted chair conformation in the solid state. The syntheses, structural, spectral, and magnetic data are presented and discussed here.

A series of dinuclear organophosphorus‐bridged vanadium(IV) complexes with the Kläui ligand, [CpPOMeCo]–, have been synthesized to model the catalytic activity of industrially used vanadium phosphate oxidation catalysts. Dimeric species of the general formula [(CpPOMeCo)V(O)(μ‐O2PR′R″)]2 (R′,R″ = H, OH, Me, Ph, or 4‐OPh‐NO2), [(CpPOMeCo)V(O)]2(μ‐oxalate), and [(CpPOMeCo)V(Cl)]2(μ‐oxalate) are reported. These complexes have been characterized via spectral and magnetic analyses. The synthesis, characterization, and X‐ray structures of the mononuclear vanadium(IV) complexes (CpPOMeCo)V(O)Cl(OH2) and(CpPOMeCo)V(O)(acac) are also presented here. [CpPOMeCo]–= η5‐cyclopentadienyltris(dimethylphosphito‐κ1P)cobaltate(III); acac = acetylacetonate.

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The title compound, C21H27NO2, exhibits hydrogen bonding between the phenolic H atom and the heterocyclic N atom. The absolute configuration of the mol­ecule is known from the synthetic procedure.

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