Angela R. Suárez

Oxidation of organic sulphides to sulphoxides by nitric acid catalyzed by FeBr3 and (FeBr3)2(DMSO)3

Abstract The selective oxidation of organic sulphides to sulphoxides by 9.5 % (∼1.5 M) nitric acid was catalyzed by FeBr 3 and the coordination compound (FeBr 3 ) 2 (dimethylsulphoxide) 3 .

DEHYDROHALOGENATION OF HALOALKANES PROMOTED BY METAL HALIDES. HYDROGEN HALOMETALATES FORMATION AND THEIR USE AS HYDROHALOGENATING AGENTS

Abstract In the dehydrohalogenation of 1,2-dihalo-1,1-diphenylethanes, 1, to 2-halo-1,1-diphenylethene, 2, either at 76°C or at 50°C, promoted by catalytic amount of the anhydrous bromides of Fe(III), Ru(III) and Al(III) and Fe(III) chloride the chemical transformation of the metal halides was observed. In reactions carried out in vacuum or under nitrogen atmosphere, the hydrogen halide eliminated from the organic substrate reacted with the metal halides rendering the unstable hydrogen perhalometalates H + n [MX 3+n ] n− . We demonstrate that these compounds behave as hydrogen halide donors in the hydrohalogenation of olefins at 4°C.

Non-linear chemical dynamics in the activation of haloalkanes by iron(III)

Abstract Catalytic dehydrohalogenation of dihaloalkanes with Fe(III) and its mechanism has been investigated. Damped oscillations of the reaction mixture were observed when the reactions were carried out at 50°C in evacuated systems. We have described the main features of this behavior taking into account the organometallic intermediates, the reversibility of the reaction and the catalyst transformation.