ISSN 2079-9780, Review Journal of Chemistry, 2013, Vol. 3, No. 4, pp. 304–322. © Pleiades Publishing, Ltd., 2013. 304 CONTENTS 1. Introduction 2. Bidentate Ligands 2.1. Complexes with Bidentate Ligands 2.1.1. Complexes with NS donor ligands. 2.1.2. Complexes with NN and OO donor ligands. 2.1.3. Complexes with NO donor ligands. 3. Tridentate Ligands 3.1 Complexes with Tridentate Ligands 3.1.1. Complexes with NNS donor ligands. 3.1.2. Complexes with ONS donor ligands. 3.1.3. Complexes with ONO donor ligands. 3.1.4. Complexes with NNO donor ligands. 4. Tetradentate Ligands 4.1. Complexes with Tetradentate Ligands 4.1.1. Complexes with OSSO donor ligands. 4.1.2. Complexes with NNNN donor ligands. 4.1.3. Complexes with NNOO donor ligands. 4.1.4. Complexes with NOOO donor ligands. 5. Pentadentate Ligands 5.1. Complexes with Pentadentate NNOOO donor Ligands 6. Conclusions 1. INTRODUCTION Coordination chemistry of vanadium has been attracted increasing interest during last few years due to the model character and variety of complexes with the ligands having various donor sites [1]. The great current interest of vanadium is also because of the discovery of its presence in abiotic as well as biotic sys- tems [2, 3]. Another important impetus to the coordination chemistry of vanadium in the context of med- Oxovanadium Complexes with Multidentate Ligands 1 Khurram Shahzad Munawar a , Saqib Ali a , Muhammad Iqbal a , and Allah Nawaz Khan b a Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan b Department of Biochemistry, Capital Hospital, CDA, Islamabad e-mail: drsa54@yahoo.com Received January 14, 2013; in final form June 28, 2013 Abstract—Vanadium has ability to coordinate with multidentate ligands in different geometries to produce variety of complexes. Usually the reactions are carried out by refluxing the methanolic solu- tion of oxovanadium salt (VOSO 4 ) with the ligands. Vanadyl sulphate can easily exchange its sulphate group with organic ligands. Sometimes solvent molecules are also attached with the complexes. Vanadyl oxygen usually occupies the axial position. The syntheses and geometries, and selective crystal structures of these complexes are discussed. Keywords: VOSO 4 , oxovanadium complexes, geometries, multidentate ligands. DOI: 10.1134/S2079978013040018 1 The article is published in the original.