Abstract The complexes of copper (II) chloride with quaternary ammonium salts grafted on various mineral supports (the modifications of SiO 2–KSK, silochrome, Perlkat) are highly active in two environmentally important processes: the reaction of carbon tetrachloride with alkanes and the oxidative coupling of thiols. The effectiveness of the catalysts depends on the transition metal, the ionic liquid, and the support nature. In CCl 4 transformations, the ...