En el presente trabajo describimos el estudio de estas reacciones aplicadas a la preparación de derivados del sistema TpW (CO)z -L (L =ligando organometálico con elementos del IV grupo principal), con el objeto de comparar el componarniento del sistema del tungsteno con el del molibdeno, en parte estudiado por nosotros anteriormente.
We report the reactions of TpW(COh X (Tp = h7-C7H 7, X = Br, 1)with thc anionic species MPh3 - (Ph = C6 Hs ; M= Ge, Sn, Pb) leading to thesubstitution products TpW(C0hMPh3 (3). The compound 3d (M= Pb) couldnot be isolated due to its instability and was only detected spcctroscopically;3b (M= Ge) and 3c (M = Sn) were isolated as red crystals and caracterizedthrough elemental analysis and spectrometry (IR, 1H-NMR and MS).The reduction of TpW(COhl with Na/Hg in THF leads to the an10n[TpW (COhr (1), which also reacts with MPh3- (M = Si, Ge, Sn) forming3a (M = Si), 3b and 3c; 3a was detected only spectroscopically.
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