Abstract
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.
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