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Synthesis and Electrochemistry of Vanadium(IV) Schiff Base Complexes

A.H. Kianfar*^,a and S. Mohebbi^b

^aDepartment of Chemistry, Yasouj University,Yasouj, Iran
^bDepartment of Chemistry, Kurdistan University, Sanandaj,Iran

The electrochemical properties of vanadyl(IV) derivatives, namely salen Schiff base complexes of the type [VO(Salen)] (5-BrSalen, 5-NO₂Salen, 5-MeOSalen, salpn (bis(salicylaldehyde)-1,3-propanediamine, 5-BrSalpn, 5-NO₂Salpn, 5-MeOSalpn, Me2Salen, Salophen, 5-BrSalophen, and 5-MeOSalophen) were investigated. The equatorial Schiff base ligands affect the oxidation potentials via interaction with the d-orbitals of the vanadyl metal ion. The cathodic peak potential (E_pc) becomes less negative according to the sequence MeO- < H- < Br- < NO₂-.

Keywords: Vanadyl complexes, Schiff base, Spectroscopic, Electrochemistry