%0 Journal Article 
%A Antiñolo García, Antonio
%A Fajardo, Mariano
%A Otero Montero, Antonio
%A Royo Gracia, Pascual
%T Mixed halodicyclopentadienyl-niobium(V) and -tantalum(V)
%D 1984
%@ 0022-328X
%U http://hdl.handle.net/10017/4800
%X Oxidation of (η5-C5H5)2MCl (M = Nb, Ta) with 1 mol of Cl2, Br2 or I2 gives (η5-C5H5)2MClX2 whereas the reaction with an excess of the halogen gives the cationic complexes [η5-C5H5)2MClX]+ X3− (X = Br, I). Similar oxidation of (η5-C5H5)2MCl2 with 0.5 mol of halogen gives (η5-C5H5)2MCl2X complexes, but if the halogen is used in excess cationic [η5-C5H5)2MCl2]+ X3− (X = Br, I; M = Ta and X = I, M = Nb) are obtained. All these complexes can also be obtained simultaneously by oxidizing (η5-C5H5)4M2Cl3, and the separation is fairly easy in most cases. Conductivity and IR and NMR data are discussed.
%K Halodicyclopentadienyl-niobium(V)
%K Tantalum(V)
%K Ciencia
%K Química inorgánica
%K Science
%K Chemistry, inorganic
%~ Biblioteca Universidad de Alcala