Investigation on the complex of diperoxovanadate with 2-(2′-pyridyl)-imidazole

Spectroscopic investigation of the interaction between diperoxovanadate complexes and benzimidazole-like ligands

“…1), which is assigned to bpV according to previous reports [16][17][18][19][20][21]. When 1H-benzo[d] [1,2,3]triazole is added to bpV solution, a new single peak appears at about −722 ppm, which is assigned to the species [OV(O 2 ) 2 (bentaz)] − .…”

“…4), one group was assigned to the free 2-methyl-1H-benzo[d]imidazole and the other to the coordinated 2-methyl-1H-benzo[d]imidazole, i.e., the ligand of the new species formed in the interaction system. Chemical shifts and the relative areas of the 1 H and 13 C peaks suggest that the newly-formed species [OV(O 2 ) 2 L] − (L = benzimidazole-like ligands) are six-coordinated, similar to [OV(O 2 ) 2 (Imi)] − and [OV(O 2 ) 2 (L )] − (L = 4-substituted pyridines) systems we studied previously[20,24].…”

“…Maurya et al have developed benzimidazole-like ligands to synthesize vanadium complexes as catalyst for the liquid phase oxidation of organic substrates [13][14][15]. In previous reports [16][17][18][19][20][21][22][23][24][25], Chen and Yi groups have performed NMR studies and theoretical studies on the reactions of diperoxovanadate and a series of organic ligands in solutions and found the substituted groups in organic ligands affect the reaction equilibrium.…”

Spectroscopic and theoretical study on the interaction between diperoxovanadate complexes and glycyl-histidine

“…Although much effort has been expended on investigating the complicated structures and chemical behaviors of diperoxovanadates in solution, there are still problems not completely elucidated owing to the complexity of vanadium chemistry. In our previous works [8,[20][21][22][23] we have studied the reactions of diperoxovanadates with a series of organic ligands in solution. In this work, we extend our study to the interactions between diperoxovanadates (K 3 …”

Study on structural variation of oxalate-oxodiperoxovanadate(V) from solid state to solution using NMR spectroscopy and theoretical calculation

“…The general coordination number of vanadium in complexes with multi-dentate ligands ranges from four to eight [3,4]. X-ray diffraction studies show that many monomeric oxoperoxovanadium complexes are commonly pentagonal bipyramidal [5,6]. In contrast, since vanadate readily undergoes coordination geometry changes [7,8], whether the coordination number of the complexes in solution is six or seven is still controversial [9][10][11].…”