Oxido- and dioxidovanadium(V) complexes with o-vanillin semicarbazone: synthesis and crystal structure
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546.88+548 (1)
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CUBA, Lidia; BOUROSH, Paulina; KRAVTSOV, Viktor; GORINCIOI, Elena; DRAGANCEA, Diana. Oxido- and dioxidovanadium(V) complexes with o-vanillin semicarbazone: synthesis and crystal structure. In: Chemistry Journal of Moldova. 2018, nr. 1(13), pp. 36-45. ISSN 1857-1727.
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Chemistry Journal of Moldova
Numărul 1(13) / 2018 / ISSN 1857-1727 /ISSNe 2345-1688

Oxido- and dioxidovanadium(V) complexes with o-vanillin semicarbazone: synthesis and crystal structure


CZU: 546.88+548
DOI: 10.19261/cjm.2018.477
Pag. 36-45

Cuba Lidia1, Bourosh Paulina2, Kravtsov Viktor2, Gorincioi Elena1, Dragancea Diana1
 
1 Institute of Chemistry of the Academy of Sciences of Moldova,
2 Institute of Applied Physics, Academy of Sciences of Moldova
 
Disponibil în IBN: 7 iulie 2018


Rezumat

Two mononuclear oxido- and dioxidovanadium(V) coordination compounds [VO(HL)(EtO)(EtOH)0.6(H2O)0.4][VO(HL)(SO4)(EtO)]·0.4EtOH (1) and [VO2(HL)]·2H2O (2) have been prepared by reactions of o-vanillin semicarbazone (H2L) with VOSO4·5H2O and NH4VO3 in 1:2 and 1:1 molar ratios in alcohol and alcohol/ammonia mixture. The single crystal X-ray diffraction study shows that in these compounds, the monoanionic HLˉ organic ligand with deprotonated hydroxy group coordinates in the ONO tridentate mode, and the methoxy-group does not participate in coordination to the metal center. Compound 1 comprises complex cations and complex anions with VO3+ core and distorted octahedral geometries of vanadium atom. In complex 2, vanadium has a distorted square-pyramidal environment typical for complexes with VO2+ core.

Cuvinte-cheie
oxidovanadium(V), dioxidovanadium(V), o-vanillin semicarbazone, NMR spectroscopy, X-ray diffraction study.