Abstract
The reactions of Schiff bases (L), derived from the condensation of acetylferrocene with ethylenediamine, o-phenylenediamine, 4-methyl-o-phenylenediamine, 1, 8-diaminonaphthalene and 2, 6-diaminopyridine, with hafnium tetrachloride and bis(cyclopenta-dienyl)hafnium(IV) dichloride have been studied in refluxing benzene/THF. The derivatives [HfCl4(L)] and [Cp2HfCl (L)]Cl have been isolated and characterized by elemental analyses, molar conductance, UV/Vis, IR and 1H NMR. The ligands are bidentate species and coordinate to the central hafnium ion by the two nitrogens. Suggested structures for the complexes are reported. Referee I: E. A. Mintz Referee II: R. S. Herrick
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