RT info:eu-repo/semantics/article T1 Preparation and chemical behaviour of halodicyclopentadienyl-zirconium(III) and halodicyclopentadienyl-hafnium(III) A1 Cuenca Agreda, Tomás A1 Royo Gracia, Pascual K1 Halodicyclopentadienyl-zirconium(III) K1 Halodicyclopentadienyl-hafnium(III) K1 Ciencia K1 Química inorgánica K1 Science K1 Chemistry, inorganic AB Reduction of (η5-C5H5)2MCl2 (M = Zr, Hf) with one equivalent of Na/Hg gives [(η5-C5H5M (μ-Cl)]2. The zirconium(III) complex is also obtained from reactions between LiCp and [ZrCl3L2]2 (L2 = 2P-n-Bu3, dppe) or solutions of ZrCl4 previously reduced with Na/Hg. These zirconium(III) and hafnium(III) complexes are oxidized by AgBF4 or TlBF4 to the cationic [(η5-C5H5M(μ-Cl)]22+ complexes, which react with monodentate ligands to give [(η5-C5H5)2MClL]+ (L = OPPh3, NHPh2) and with bidentate ligands to give dinuclear cationic derivatives [(η5-C5H5)2MCl]2(μ-LL)2+ (LL-dppe, 2,2′-bipyridine). Similar complexes can also be obtained from (η5-C5H5)2MCl2 by halide abstraction with a silver salt. Oxidation of zirconium(III) and hafnium(III) derivatives with halogens gives (η5-C5H5)2MClX (X = Cl, Br) and [(η5-C5H5)2ZrCl(OPPh3)]I3. Conductivity, magnetic susceptibility and IR and NMR data are discussed. PB Elsevier SN 0022-328X YR 1985 FD 1985 LK http://hdl.handle.net/10017/4794 UL http://hdl.handle.net/10017/4794 LA eng DS MINDS@UW RD 28-mar-2024