Synthesis, Structures, and Antimicrobial Activities of Dimeric Oxovanadium(V) Complexes With Tridentate Schiff Bases

Abstract

Two new dimeric oxovanadium(V) complexes, [VO₂L¹]₂ (1) and [VO₂L²]₂ (2), where L¹ and L² are the monoanionic form of 2-{1-[2-(2-hydroxyethylamino)ethylimino]ethyl}phenol (HL¹) and 2-[1-(2-ethylaminoethylimino)ethyl]phenol (HL²), respectively, have been synthesized and characterized by elemental analysis, FT-IR spectra, and single-crystal X-ray determination. The crystal of complex (1) is orthorhombic: space group Pbca, a = 9.284(1), b = 12.733(2), c = 21.626(3) Å, V = 2556.5(7) ų, Z = 4. The crystal of complex (2) is orthorhombic: space group Pbca, a = 9.618(2), b = 12.416(3), c = 21.370(3) Å, V = 2552.0(9) ų, Z = 4. The V···V distances are 3.138(1) Å in complex (1) and 3.141(1) Å in complex (2). The V atoms in the complexes are octahedrally coordinated. The antimicrobial activity of the free Schiff bases and the complexes were studied. The complexes have potential activities against Staphylococcus aureus, Escherichia coli, and Candida albicans.

Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Keywords:

• antimicrobial activity
• crystal structure
• dimeric complex
• oxovanadium
• Schiff base

Acknowledgments

This research was supported by the National Sciences Foundation of China (No. 20676057 and 20877036) and Top-class foundation of Pingdingshan University (No. 2008010).