Schiff base−oxovanadium(IV) complexes,
[VO(Xsal-meso-stien)] (X = 3-EtO, 5-MeO, 5-Br) were
dehydrogenated upon heating at 210 °C for 3−15 h in the solid state
in the air to form [VO(Xsalton)], which have a CC double bond
in the five-membered chelate ring moiety. The structures of
[VO(3-EtOsal-meso-stien)] and
[VO(3-EtOsalton)] were determined by X-ray structure analyses.
The benzylic carbon atoms of the N−N chelate ring of
[VO(Xsal-meso-stien)] will be oxidized by oxygen in
the air to form a double bond.
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