New titanium(IV) and vanadium(IV) haloalkoxides: synthetic route and structural characterisation

Giovana G. Nunes, Dayane M. Reis, Pedro H. C. Camargo, Peter B. Hitchcock, Manfredo Hörner, Robson M. Matos, Antonio S. Mangrich, Eduardo L. de Sá, G. Jeffery Leigh, Jaísa F. Soares
2003 Journal of the Brazilian Chemical Society  
O novo cloroisopropóxido binuclear de titânio(IV), [{TiCl(OPr i ) 2 (HOPr i )} 2 (µ-OPr i ) 2 ] (1), e o primeiro oxo-cloroalcoolato de vanádio(IV) mononuclear, [VCl(O)(HOPr i ) 4 ]Cl (2), foram preparados através da reação entre [Ti(OPr i ) 4 ], KOPr i e VCl 3 em proporção 2:1:1. Os produtos foram caracterizados por análise elementar, espectroscopia na região do infravermelho, RPE, RMN, espectroscopia eletrônica, medidas de susceptibilidade magnética e difratometria de raios-X (monocristal). A
more » ... -X (monocristal). A estrutura eletrônica de 1 foi analisada através de cálculos mecânico-quânticos em nível semi-empírico. Esses complexos são precursores em potencial de óxidos homo-e heterometálicos. The novel binuclear titanium(IV) complex [{TiCl(OPr i ) 2 (HOPr i )} 2 (µ-OPr i ) 2 ], 1, and the first mononuclear vanadyl(IV) chloroalcoholate [VCl(O)(HOPr i ) 4 ]Cl, 2, have been prepared from 2:1:1 mixtures of [Ti(OPr i ) 4 ], KOPr i and VCl 3 . Products were characterised by elemental analysis, FTIR, EPR, NMR and electronic spectroscopies, magnetic susceptibility measurements and single crystal X-ray diffractometry. A third product was found to be polynuclear and to contain both titanium and vanadium. Semi-empirical quantum-mechanical calculations were carried out for the evaluation of the electronic structure of 1.
doi:10.1590/s0103-50532003000600009 fatcat:h27bn2o4ofgslhr2iq6nph47yy