1-n-Butyl-3-methylimidazolium hexafluorophosphate room-temperature ionic liquid is not only suitable as a medium for the preparation and stabilization of iridium nanoparticles but also ideal generation recyclable biphasic catalytic systems hydrogenation reactions. Thus, Ir(0) with mean diameter 2 nm have been prepared by reduction Ir(I) dissolved in H2. This solution can be reused several times olefins under mild reaction conditions.

The electrochemical properties of the room temperature ionic liquids 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM+BF4−), hexafluorophosphate (BMIM+PF6−) and 1-methyl-3-[2,6-(S)-dimethylocten-2-yl]imidazolium (MDIM+BF4−) as solvents have been studied using micro-samples, with a volume 10 μL, under vacuum conditions controlled gas moisture supplies. impact water—absorbed into liquid in manner from phase—on voltammetry dissolved redox systems on accessible potential window was...

Abstract Metal nanoparticles (MNPs) with a small diameter and narrow size distribution can be prepared by H 2 reduction of metal compounds or decomposition organometallic species dissolved in ionic liquids (ILs). MNPs dispersed ILs are catalysts for reactions under multiphase conditions. These soluble possess pronounced surfacelike rather than single‐site like catalytic properties. In other cases the not stable tend to aggregate serve as reservoirs mononuclear catalytically active species.

Nitrogen-, phosphorus-, and sulfur-containing palladacycles, typically containing four- or six-electron donor anionic metallated ligands, are emerging as a new family of organometallic catalyst precursors. These thermally air-stable complexes easy to handle their synthesis is often straightforward. Palladacycles now being successfully exploited in catalytic reactions ranging from classical hydrogenations enantioselective aldol-type condensations. The main recent achievements pertaining use...

Ionic liquids (ILs), a special group of classical molten salts, are widely used in various fields science. Historically, researchers have tested ILs out curiosity or to improve specific property particular system many areas chemistry materials However, today, far from being simple chemical curiosities and sit at the center green industrial innovation processes, where they play important roles extraction, reactive catalytic supports, spatial devices, biotransformations. In this Account, we...

Among the various properties exhibited by ionic liquids (ILs)--especially those based on imidazolium cation-their inherent patterns, very low vapour pressure and pronounced self-organization in solid, liquid even gas phase are particularly interesting since this allows use of these fluids as alternative complementary media to classical organic solvents water many applications. Hence, reaction paths that involve charge-separated intermediates or transition states accelerated--by lowering...

The reaction of 1-n-butyl-3-methylimidazolium chloride (BMI.Cl) with sodium tetrafluoroborate or hexafluorophosphate affords the molten salts BMI.X (1, X= BF4 and 2, PF6). Compounds 1 2 are viscous liquids within a wide range temperature (down to 192 K). IR, NMR, density, viscosity conductivity measurements suggest that compound behaves quasi-molecular. Compound is quasi-molecular below 279 K, but at higher temperatures probably composed imidazolium ions in an extended hydrogen-bonded network.

Stable transition-metal nanoparticles of the type [M(0)](n) are easily accessible through reduction Ir(I) or Rh(III) compounds dissolved in "dry" 1-n-butyl-3-methylimidazolium hexafluorophosphate ionic liquid by molecular hydrogen. The formation these is straightforward; they prepared dry whereas presence water causes partial decomposition with phosphates, HF and fluorides. Transmission electron microscopy (TEM) observations X-ray diffraction analysis (XRD) show [Ir(0)](n) [Rh(0)](n) 2.0-2.5...

Pd(0) nanoparticles with approximately 2 nm diameter, immobilized in 1-n-butyl-3-methylimidazolium hexafluorophosphate ionic liquid, are efficient catalyst precursors for coupling of aryl halides n-butylacrylate. In situ TEM analysis the liquid catalytic solution after reaction shows formation larger ( 6 nm). The palladium content organic phase during arylation was checked by ICP-AS and significant metal leaching (up 34%) from to at low substrate conversions drops 5-8% higher conversions....

The main "molecular" physicochemical aspects involved in the catalytic applications of "soluble" transition metal nanoparticles ionic liquids are used to explain their properties. In particular, a special view on concepts coordination catalysis is describe properties these nanoscale catalysts solution as well scope and limitations multiphase catalysis.

Abstract 2,1,3‐Benzothiadiazole (BTD) is one of the most important nuclei used in chemistry photoluminescent compounds and applicable for light technology. The understanding its properties reactions fundamental design application these derivatives molecular organic electronic devices other technologies. As a result their potential as constituents light‐emitting diodes, solar cells, liquid crystals, dyes, photovoltaic many others, attention has been focused on BTD π‐extended with use this...

Several imidazolium ionic liquids display high efficiency as catalysts for the sequential oxidation of alkene and carboxylation epoxide.

The interplay among the properties of catalysts, substrates, products, and ionic liquids (ILs) for a desired selective reaction is presented with selected examples. A guide to select most adequate IL catalytic device proposed.

The reaction of Pt(2)(dba)(3) (dba = bis-dibenzylidene acetone) dispersed in room temperature 1-n-butyl-3-methylimidazolium (BMI) hexafluorophosphate ionic liquid with molecular hydrogen (4 atm) at 75 degrees C leads to stable and isolable nanometric Pt(0) particles. X-ray diffraction analysis (XRD) the material indicated that it is constituted Pt(0). Transmission electron microscopy (TEM) particles shows formation [Pt(0)](n) nanoparticles 2.0-2.5 nm diameter. A detailed examination imbibed...

Palladium(II) compounds dissolved in 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMI·BF4) ionic liquid are shown to be able catalyze the hydrodimerization of 1,3-butadiene. In most cases, only 1,3-butadiene dimer 1,3,6-octatriene and telomer octa-2,7-dien-1-ol have been obtained. The products' selectivity catalytic activity depend on reaction conditions. 1,3-Butadiene conversion up 28%, a turnover frequency (TOF) 118 h-1, 94% were achieved with (BMI)2PdCl4 BMI·BF4. TOF significantly...

The nature of the interactions between 1,3-dialkylimidazolium cations and noncoordinating anions such as tetrafluoroborate, hexafluorophosphate, tetraphenylborate has been studied in solid state by X-ray diffraction analysis solution (1)H NMR spectroscopy, conductivity, microcalorimetry. In state, these compounds show an extended network hydrogen-bonded which one cation is surrounded at least three anion imidazolium cations. pure form, salts are better described polymeric supramolecules type...

NiCl(2)(PCy(3))(2) associated with PCy(3) promotes the selective cross-coupling of aryltosylates arylboronic acids under relatively mild reaction conditions, and a variety functional groups are tolerated in both arenes. This is one simplest most efficient experimental procedures for coupling aryl tosylates reported to date. Reaction: see text.

Abstract The reaction of N ‐alkylimidazole with alkyl sulfonates at room temperature affords 1,3‐dialkylimidazolium alkanesulfonates as crystalline solids in high yields. alkanesulfonate anions can be easily substituted by a series other [BF 4 , PF 6 3 (CF 2 CF ) SO and N(CF ] simple anions, salts, or acids water temperature. Extraction dichloromethane, filtration through short basic alumina column solvent evaporation the desired ionic liquids 80–95% yield. purity (>99.4%) these...