Author/Authors :
Giovana G. Nunes، نويسنده , , Geraldo R. Friedermann، نويسنده , , José Luiz B. dos Santos، نويسنده , ,
Marcelo H. Herbst، نويسنده , , Ney V. Vugman، نويسنده , , Peter B. Hitchcock، نويسنده , , G. Jeffery Leigh، نويسنده , , Eduardo L. S?، نويسنده , , Carlos J. da Cunha، نويسنده , , Ja?sa F. Soares، نويسنده ,
Abstract :
The green crystalline, homoleptic vanadium(IV) alkoxide [V2(μ-OPri)2(OPri)6] (I) has been reproducibly prepared in more than 60% yield; its identity was confirmed by chemical and physical methods including single-crystal X-ray diffractometry. Complex I is thermochromic in solution, changing reversibly from royal blue to gold yellow when cooled from 300 to 210 K. The assignment of this thermochromic behaviour to a mononuclear (image) ↔ binuclear (S = 1) solution equilibrium is discussed. Complex I is a potential precursor of industrially-relevant vanadium-(IV), -(V) and mixed-valence vanadium oxides.
Keywords :
Vanadium(IV) , Alkoxide , Solution thermochromism , continuous , Precursor , Reversible
