Ionic liquids with trichloride anions for oxidative dissolution of metals and alloys

Abstract

Ionic liquids (ILs) with trichloride anions ([Cl]) combined with different cations were synthesised by bringing chlorine gas into contact with the corresponding chloride (Cl) ILs at room temperature. These trichloride ILs safely store chlorine and are useful as oxidising agents for dissolution of various metals and alloys under mild conditions.

From Polyhalides to Polypseudohalides: Chemistry Based on Cyanogen Bromide

“…Thep seudohalogen anion can be compared to known trihalides such as [Br 3 ] À or [Cl 3 ] À .Quantum-chemical calculations show that the [Br] À detachment energy for [Br 3 ] À is higher by 37 kJ mol À1 than that for [Br(BrCN)] À (see the Supporting Information, Table S9). 8(2) pm) is weakened and elongated by 5.3 pm in comparison to free BrCN (177.5(9) pm). As ar esult of charge transfer from the bromide ion into the LUMO of the coordinated BrCN molecule (for the frontier orbitals of BrCN and [Br(BrCN)] À ,s ee Figure S13), the BrÀCb ond (182.…”

“…[1] Their observation was the starting point of the vast chemistry of polyhalogen compounds,which have been studied numerously over the last years. [3,[7][8][9][10] Whereas the polyhalides and their potential applications have been intensively investigated, the chemistry of polypseudohalides is less studied. [3,[7][8][9][10] Whereas the polyhalides and their potential applications have been intensively investigated, the chemistry of polypseudohalides is less studied.…”

“…[24,25] [*] B. [26,28] Because of its severe toxicity combined with ah igh vapor pressure at 25 8 8C( 160 mbar), [29] the use of neat BrCN requires the highest safety precautions.T he stabilization of BrCN in the form of polypseudohalides,a si ni onic liquids,r esults in ar educed vapor pressure.C onsequently, asafer and easy-to-handle substance for applications such as metal recovery [8][9][10] or organic synthesis is obtained. The pseudohalogen BrCN is atoxic compound that is widely used in organic chemistry.…”

Polyhalogen‐ und Polyinterhalogen‐Anionen von Fluor bis Iod

“…Man spekuliert, dass sich diese ionischen Flüssigkeiten aus Polyhalogen‐Anionen für das Recycling oder Urban Mining von Metallen eignen könnten. Wie gezeigt wurde, lösen sich selbst Metalle wie Gold in flüssigen Trichloriden . Andere Publikationen berichten über sichere, solvometallurgische Methoden zur oxidativen Lösung von Metallen wie Fe, Cu, Sb, Co, Zn, In, Ga, Bi, Ge, Sn, Pd und Au durch Trichloride sowie verschiedene Tri(inter)halogenide .…”

Synthese und Charakterisierung von nichtklassischen Polyinterhalogeniden basierend auf Brommonochlorid

“…[3,4] Gleichwohl wurden in den vergangenen Jahren einige neuartige Polyhalogenidverbindungen, wie die Dianionen [Cl 8 ] 2À und [Br 24 ] 2À ,p ubliziert. [3,6,7] Interhalogenanionen lassen sich einteilen in klassische (elektropositives Zentrum umgeben von elektronegativeren Halogenatomen, z. [3,6,7] Interhalogenanionen lassen sich einteilen in klassische (elektropositives Zentrum umgeben von elektronegativeren Halogenatomen, z.…”