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Université de Fribourg

A comparative study of (poly)ether adducts of alkaline earth iodides – an overview including new compounds

Maudez, William ; Fromm, Katharina M.

In: Zeitschrift für anorganische und allgemeine Chemie, 2012, vol. 638, no. 11, p. 1810–1819

New homoligand and mixed-ligand adducts of the heavier alkaline earth metal (Ca, Sr, Ba) halides with oxygen-donor polyether ligands have been isolated and characterized and are compared with previously obtained compounds of the same class in order to give an overview on structures and properties. Homoligand halide adducts, discussed herein, are [CaI(DME)₃]I (1),...

Université de Fribourg

Ring a bell: Disubstituted calix[4]arene as ligand for transition metal chlorides

Crochet, Aurelien ; Fromm, Katharina M.

In: Polyhedron, 2012, p. -

Lower rim 1,3-disubstituted p-tert-butylcalix[4]arene is studied here in its deprotonated form as complexing ligand for iron and chromium chloride. Crystallization of the two complexes from dry THF gives two different stoichiometries and structures, a trinuclear iron compound and a second, mononuclear structure with chromium. In both cases, the ligand adopts an elliptical shape and the metal ions...