HOT Article: Ionic liquids in biphasic catalysis

Oelkers and Sundermeyer, in this HOT Article, present a general approach towards 1,4-diazabutadiene (DADS) ligands with various onium cations via acid–base reactions and towards their noble-metal complexes. The solubility and immobilization of such complexes in ILs is quantitatively shown via photometric measurements using a chromophoric Mo(0) DADS complex in a toluene/[BMIM]OTf biphasic mixture as a model system. It was shown that complexes with ionic liquid (IL) – typical onium salts of sulfonated diazadienes as ligands are strongly retained in an IL phase in contact with a toluene phase, which may make these ligands potentially useful in IL/organic biphasic catalysis.

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Sulfonate-tagged 1,4-diazabutadiene (DADS) ligands and their noble-metal complexes – synthesis, characterization and immobilization in ionic liquids
Benjamin Oelkers and Jörg Sundermeyer
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10939A

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