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Titanocene complexes with nonlinear pseudohalide ligands: Synthesis, spectroscopic characterization and crystal structure
Authors: Erben Milan | Císařová Ivana | Honzíček Jan | Vinklárek Jaromír
Year: 2009
Type of publication: článek v odborném periodiku
Name of source: Inorganica Chimica Acta
Publisher name: Elsevier Science SA
Place: Lausanne
Page from-to: 2480-2486
Titles:
Language Name Abstract Keywords
cze Titanocenové komplexy nelineárních halogenidů: příprava, spektroskopická charakterizace a krystalová struktura Dvojjaderné titanocenové komplexy [Cp2Ti(tcm)]2O (4), [Cp2Ti(dca)]2O (5) a [Cp2Ti(dcnm)]2O (6) (tcm = trikyanomethanid, dca = dikyanamid a dcnm = dikyanonitrosomethanid) byly připraveny reakcí Cp2TiCl2 (1) s odpovídající alkalickou solí pseudohalogenidu ve vedném prostředí. Jestliže je reakce prováděna v bezvodém organickém rozpouštědle, vznikají jednojaderné sloučeniny typu Cp2Ti(tcm)2 (2) and Cp2Ti(dca)2 (3). Příprava bis(pseudohalogenidového) komplexu Cp2Ti(dcnm)2 tímto způsobem není možná z důvodu rozkladu ligandu dcnm za vzniku sloučeniny 6 s můstkovým kyslíkovým atomem. Všechny připravené komplexy byly charakterizovány elementární analýzou, NMR, Ramanovou, IR a UV-Vis spektroskopií. Molekulová struktura komplexů 2, 4 aa 6 (dva polymorfy) byla stanovena RTG difrakční analýzou připravených monokrystalů. Titanium;Nonlinear pseudohalides;Bent metallocenes;Crystal structure; Infrared; Raman
eng Titanocene complexes with nonlinear pseudohalide ligands: Synthesis, spectroscopic characterization and crystal structure Binuclear titanocene complexes [Cp2Ti(tcm)]2O (4), [Cp2Ti(dca)]2O (5) and [Cp2Ti(dcnm)]2O (6) (tcm− = tricyanomethanide, dca− = dicyanamide and dcnm− = dicyanonitrosomethanide) were synthesized in moderate yields by the reaction of Cp2TiCl2 (1) with respective alkali metal pseudohalide salts in the aqueous solution. When the reaction was carried out in dry organic solvents, mononuclear compounds Cp2Ti(tcm)2 (2) and Cp2Ti(dca)2 (3) were isolated. Preparation of dipseudohalide complex Cp2Ti(dcnm)2 by this manner was unsuccessful due to decomposition of dcnm ligand resulting in formation of oxygen-bridged compound 6. All prepared compounds were characterized by elemental analysis, NMR, Raman, infrared and UV?Vis spectroscopy. Molecular structures of 2, 4 and 6 (two polymorphs) have been determined by single-crystal X-ray diffraction analysis. Titanium;Nonlinear pseudohalides;Bent metallocenes;Crystal structure; Infrared; Raman

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