Sutradhar, Manas Mukherjee, Gurunath G. B. Drew, Michael Ghosh, Saktiprosad Simple General Method of Generating Non-oxo, Non-amavadine Model Octacoordinated Vanadium(IV) Complexes of Some Tetradentate ONNO Chelating Ligands from Various Oxovanadium(IV/V) Compounds and Structural Characterization of One of Them A simple general route of obtaining very stable octacoordinated non-oxovanadium(IV) complexes of the general formula VL<sub>2</sub> (where H<sub>2</sub>L is a tetradentate ONNO donor) is presented. Six such complexes (<b>1</b>−<b>6</b>) are adequately characterized by elemental analysis, mass spectrometry, and various spectroscopic techniques. One of these compounds (<b>1</b>) has been structurally characterized. The molecule has crystallographic 4̄ symmetry and has a dodecahedral structure existing in a tetragonal space group <i>P</i>4̄<i>n</i>2. The non-oxo character and VL<sub>2</sub> stoichiometry for all of the complexes are established from analytical and mass spectrometric data. In addition, the non-oxo character is clearly indicated by the complete absence of the strong ν<sub>V</sub><sub></sub><sub>O</sub> band in the 925−1025 cm<sup>-1</sup> region, which is a signature of all oxovanadium species. The complexes are quite stable in open air in the solid state and in solution, a phenomenon rarely observed in non-oxovanadium(IV) or bare vanadium(IV) complexes. Simple General Method;Tetradentate ONNO Chelating Ligands;mass spectrometry;VL 2 stoichiometry;spectroscopic techniques;dodecahedral structure;tetradentate ONNO donor;H 2 L;oxovanadium species;Structural Characterization;complex;formula VL 2 2007-06-11
    https://acs.figshare.com/articles/figure/Simple_General_Method_of_Generating_Non_oxo_Non_amavadine_Model_Octacoordinated_Vanadium_IV_Complexes_of_Some_Tetradentate_ONNO_Chelating_Ligands_from_Various_Oxovanadium_IV_V_Compounds_and_Structural_Characterization_of_One_of_Them/3002560
10.1021/ic062242r.s016