Structural characterization of vanadium terpyridine complexes for the study of in-situ ligand cyclization reaction

13th Joint Conference on Chemistry

Jin, Wan-Ting^1 ; Zhou, Zhao-Hui^1

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen

361005, China^1

关键词: Carboxylate ligands;    Cyclization reactions;    Furanones;    Mixed valence complexes;    Structural characterization;    Terpyridines;    Vanadyl complexes;    X ray structural analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/509/1/012158/pdf
DOI  :  10.1088/1757-899X/509/1/012158

来源: IOP

【 摘 要 】

Vanadyl complex [VIVO(hmfc)(terpy)]3.5H2O (1) (hmfc=5-hydroxy-3-methyl-2(5H)-furanone-5-carboxylate; terpy=2,2′:6′,2-terpyridine) has been isolated, which the hmfc ligand was formed through in-situ cyclization of lactate. X-ray structural analysis shows that hydroxyfuranone carboxylate chelates to vanadium through hydroxy group and carboxy group. Under the same condition, a peroxo vanadium terpyridine [VVO(O2)(terpy)(H2O)]Cl⋅H2O (2) could also be isolated, which is directly formed by molecular oxygen. In addition, a mixed-valence complex [V2O3(terpy)2]Cl3⋅9H2O (3) was isolated with two dimensional water units. These three complexes were characterized by elemental analysis, IR, UV-Vis, EPR, TGA, bond valence calculations and X-ray structural analyses. The formation of hydroxyfuranone carboxylate ligand may provide a new approach for one-pot synthesis of γ-hydroxy butenolide derivatives.