Synthesis and characterization of vanadium(III) and oxovanadium(IV/V) species with deprotonated amide ligands

Abstract

Reaction of the amide ligand N-[2-(2 pyridylmethyleneamino) phenyl] pyridine-2-carboxamide (Hcapca) with VCI₃ affords the compound Trans-[VCI₂(capca)]1, the first example of a vanadium(III) Complex containing a vanadium- deprotonated amide nitrogen bond, while reaction of bis(pentane-2,4-dionato)oxovanadium(IV) with the related ligands 1,2-bis(2-hydroxybenzamido)benzene (H₄hybeb)and 1-(2-hydroxybenzamido)-2-(2-pyridinecarboxamido) benzene (H₃hypyb) yields the complexes Na2[V^IVO(hybeb)]2 and Na[V^IVO(hybeb)]3 respectively; the X-ray crystal structures of 1 and 3 are reported.