Dario Braga, Lucia Maini, Stefano L. Giaffreda, Fabrizia Grepioni, Michele R. Chierotti and Roberto Gobetto Supramolecular Complexation of Alkali Cations through Mechanochemical Reactions between Crystalline Solids Chemistry - A European Journal 10
The organometallic species [CoIII(η5-C5H4COOH)(η5-C5H4COO)] reacts quantitatively as a solid polycrystalline phase with a number of crystalline alkali salts MX (M = K+, Rb+, Cs+, NH4+; X = Cl−, Br−, I−, PF6−) to afford supramolecular complexes of formula [CoIII(η5-C5H4COOH)(η5-C5H4COO)]2⋅M+X− (see scheme). In some cases, the mechanochemical complexation requires kneading of the two solids with a catalytic amount of solvent. The solid-state products were characterized by a combination of diffraction experiments and solid-state NMR spectroscopy.
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