Supramolecular potential of vanadium β-diketonate and picolinate compounds and the first one-dimensional oxidovanadium(IV) complex with β-diketonate ligand

Abstract

Three vanadium compounds with β-diketonato or picolinato ligands were prepared and structurally characterized. In compounds [VO(tfpb) 2 ]∞ (1) (tfpb = 4,4,4-trifluoro-1-phenand in tylbutane-1,3-dionate) and [VO(acac) 2 (2-pyridone)] (2) the coordination of vanadium atom is octahedral he compound Hpy[VO 2 (pic)Cl] (3) the central atom is pentacoordinated. X-Ray crystallographic studies reveal infinite chain formation with the V=O⋯V=O interactions in 1, while 2 and 3 are mononuclear compounds. Centrosymmetric hydrogen-bonded dimers are formed in 2 via N-H⋯O interactions due to the 2-pyridone ligand. In 3 the Hpy + cation is hydrogen bonded to the complex anion and crystal structure is further stabilized by π⋯π and C-H⋯O interactions.