Selective Catalytic Hydrodimerization of 1,3-Butadiene by Palladium Compounds Dissolved in Ionic Liquids
Citations Over TimeTop 1% of 1998 papers
Abstract
Palladium(II) compounds dissolved in 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMI·BF4) ionic liquid are shown to be able to catalyze the hydrodimerization of 1,3-butadiene. In most of the cases, only the 1,3-butadiene dimer 1,3,6-octatriene and the telomer octa-2,7-dien-1-ol have been obtained. The products' selectivity and catalytic activity depend on the reaction conditions. 1,3-Butadiene conversion up to 28%, a turnover frequency (TOF) of 118 h-1, and a selectivity of 94% on telomer were achieved with (BMI)2PdCl4 dissolved in BMI·BF4. The 1,3-butadiene conversion and TOF were significantly increased to 49% and 204 h-1, respectively, by a 5-atm pressure of carbon dioxide. The reactions were performed under homogeneous conditions at 70 °C. However, at temperatures below 5 °C, a two-phase system is formed and the products are easily removed from the reaction mixture by simple decanting. The recovered ionic catalyst solution can be reused several times without any significant changes in the catalytic performance. The structure of the new catalyst precursor (BMI)2PdCl4 has been determined by X-ray diffraction analysis.
Related Papers
- → Brønsted acidic ionic liquid 1-methylimidazolium tetrafluoroborate: a green catalyst and recyclable medium for esterification(2003)297 cited
- → Density and Viscosity Data for Mixtures of Ionic Liquids with a Common Anion(2014)94 cited
- → Densities and viscosities for ionic liquids mixtures containing [eOHmim][BF4], [bmim][BF4] and [bpy][BF4](2014)64 cited
- → 1‐Butyl‐3‐methylimidazolium Tetrafluoroborate ([Bmim]BF4) Ionic Liquid: A Novel and Recyclable Reaction Medium for the Synthesis of vic‐Diamines(2003)43 cited
- Synthesis and Characterization of Alkyl Imidazolium-Based Ionic Liquids(2012)