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Synthesis and supramolecular solid state structure of dioxovanadium(V) complexes with 2-benzothiazolylhydrazone ligands

Dioxovanadium(V) complexes and 2-benzothiazolylhydrazones both present promising area of research with various biological applications. Combining them in a unique system could enhance their biological activities. In order to increase solubility of complexes in water medium ionic dioxovanadium(V) complexes with 2-benzothiazolylhydrazone ligands were prepared. Reactions of 2-hydrazinobenzothiazole and aromatic aldehydes afforded Schiff base ligands (H2L1‒3). Reactions of [VIVO(acac)2] with H2L1‒3 in ethanol solution and with the equimolar addition of Et3N produced three Et3NH+[VVO2L1]– ‒ Et3NH+[VVO2L3]– complexes. Crystal and molecular structures of prepared complexes were determined by X-ray diffraction on single crystals. In complex compounds vanadium is present in the anionic part of the compound, [VO2L]‒, in a distorted square pyramidal environment. Anionic and cationic parts of all three complex compounds are connected via N‒H···O and C‒H···O hydrogen bonds. Anionic parts of the complex are mutually connected in crystal structure via O‒H···O , C‒H···O, C‒H···N and C‒H···S hydrogen bonds into endless chains

ionic dioxovanadium(V) complexes , 2-benzothiazolylhydrazones, crystal structure

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