Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1233679 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2010 | 5 Pages |
Abstract
To understand the effects of benzimidazole substitution on reaction equilibrium, the interactions between a series of benzimidazole-like ligands and [OV(O2)2(D2O)]â/[OV(O2)2(HOD)]â in solution were explored by a combination of multinuclear (1H, 13C, and 51V) magnetic resonance and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological condition. Some direct NMR data are reported for the first time. These results show that the relative reactivity among the organic ligands is 2-methyl-1H-benzo[d]imidazole > (1H-benzo[d]imidazol-2-yl)methanol > 1-(1H-benzo[d]imidazol-2-yl)ethanol > 1H-benzo[d][1,2,3]triazole. Both the steric effect and the electron effect of the 2-position substituted groups in benzimidazole ring affect the reaction equilibrium. The competitive coordination results in the formation of a series of new six-coordinated peroxovanadate species [OV(O2)2L]â (L = benzimidazole-like ligands). Moreover, the results of density functional calculations provided a reasonable explanation on the relative reactivity of the benzimidazole-like ligands as well as the important role of solvation in these reactions.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Xianyong Yu, Fengxian Yang, Danhong Ji, Jiming Zhou, Ronghua Liu, Guobin Li, Xiaofang Li, Jian Chen, Haowen Huang, Pinggui Yi,