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Complexation of Palladium(II) with unsaturated Dithioethers a systematic development of highly selective ligands for solvent extraction

  • There is a demand for new and robust PdII extractants due to growing recycling rates. Chelating dithioethers are promising substances for solvent extraction as they form stable square-planar complexes with PdII. We have modified unsaturated dithioethers, which are known to coordinate PdII, and adapted them to the requirements of industrial practice. The ligands are analogues of 1,2-dithioethene with varying electron-withdrawing backbones and polar end-groups. The crystal structures of several ligands and their palladium complexes were determined as well as their electro- and photochemical properties, complex stability and behaviour in solution. Solvent extraction experiments showed the superiority of some of our ligands over conventionally used extractants in terms of their very fast reaction rates. With highly selective 1,2-bis(2-methoxyethylthio)benzene (4) it is possible to extract PdII from a highly acidic medium in the presence of other base and palladium-group metals.

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Author:Juliane Träger, Tillmann Klamroth, Alexandra Kelling, Susanne Lubahn, Ernst Cleve, Wulfhard Mickler, Matthias Heydenreich, Holger Müller, Hans-Jürgen Holdt
ISSN:1434-1948 (print)
Parent Title (English):European journal of inorganic chemistry : a journal of ChemPubSoc Europe
Place of publication:Weinheim
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
Tag:Chelates; Ligand design; Palladium; Renewable resources; S li-gands
First Page:2341
Last Page:2352
Funder:Arbeitsgemeinschaft industrieller Forschungsvereinigungen "Otto von Guericke" e.V. (AIF); ReMetall Drochow GmbH
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert