Abstract
The bidentate benzimidazolic hpbm (1), [2-(2-hydroxyphenyl)-1H-benzimidazole], was obtained under mild conditions, and its corresponding metal complexes, di-µ-oxo dimanganese(IV,IV) [Mn2O2(hpbm)4 · 2Py · 5H2O] (2), and mononuclear complex [Co(hpbm)2] (3), were prepared and characterized. The crystal structures of 2 and 3 have been established by X-ray diffraction. Complex 2 consists of two six-coordinate manganese(IV) coordinated to two hpbm ligands and bridged by two O2− with a Mn–Mn distance of 2.777 Å. For 3, a Co(II) is coordinated to two deprotonated hpbm in a nearly tetrahedral environment. Hydrogen bonds play pivotal roles in constructing the dimensional structures of both the compounds.
Acknowledgments
This work was supported by the National Natural Science Fund of China (20971103), International Cooperation Foundation of Shaanxi Province and Educational Committee Foundation of Shaanxi Province.