Vanadium(III) chloro and bromo complexes with tetradentate Schiff base ligands

Abstract

Vanadium(III) Schiff base chelates of the types V(chel)Cl,py (chel = saen, saph) and V(saen)Cl,py₂ have been synthesized by allowing VCl₃ and the ligand to react in pyridine solutions. The bromo derivatives V(saen)Br,py and V(saph)Br,py₂ can be obtained by LiBr substitution. The magnetic and spectral properties of the complexes are consistent with tetragonally distorted octahedral structures, though the μ_eff value for V(saen)Cl,py is slightly lower than expected and difficult to explain with certainty.