Abstract:Este trabalho tratou da síntese, caracterização espectroscópica e do comportamento eletroquímico dos compostos [W(CO) 4 (bipy)] (1), [W(CO) 3 (bipy)(dppm)] (2) e [W(CO) 3 (bipy)(dppf)] (3), bipy = 2,2'-bipiridina; dppm = bis(difenilfosfina)metano; dppf = 1,1'-bis(difenilfosfina)ferroceno. Os dados provenientes das espectroscopias no infravermelho e de RMN 31 P{ 1 H} mostraram que o tungstênio apresenta uma geometria de coordenação octaédrica com as fosfinas atuando como ligantes monodentados. Os estudos eletro… Show more
“…Stability towards oxidation is gained by the presence of the diphosphines. 122 The compound [Mo(CO) 3 (PF 3 ) 3 ] was originally described as occurring only in the mer-form, on the basis of IR spectra. This was an unexpected result, and a reinvestigation using high-field 19 F and 31 P NMR, including computer simulations, has shown that in solution this compound occurs as a mixture of mer-and fac-isomers.…”
“…Stability towards oxidation is gained by the presence of the diphosphines. 122 The compound [Mo(CO) 3 (PF 3 ) 3 ] was originally described as occurring only in the mer-form, on the basis of IR spectra. This was an unexpected result, and a reinvestigation using high-field 19 F and 31 P NMR, including computer simulations, has shown that in solution this compound occurs as a mixture of mer-and fac-isomers.…”
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