نتایج جستجو برای: imidazolium based salts

تعداد نتایج: 2959675  

Journal: :Organic letters 2010
Scott A Shackelford John L Belletire Jerry A Boatz Stefan Schneider Amanda K Wheaton Brett A Wight Herman L Ammon Dmitry V Peryshkov Steven H Strauss

Thirteen bridged triazolium and imidazolium dicationic salts, which uniquely pair closo-icosahedral perfluoroborane [B(12)F(12)](2-), borane [B(12)H(12)](2-), or carborane [CB(11)H(12)](-) anionic species with unsaturated bridged heterocyclium dications, were synthesized using an aqueous benchtop method. This considerably extends the scope of a reported aqueous synthesis of binary [heterocycliu...

2016
Eva Jürgens Kai N. Buys Anna-Theresa Schmidt Samantha K. Furfari Marcus L. Cole Michael Moser Frank Rominger Doris Kunz

Herein we report the optimised synthesis of a versatile bis(imidazole)carbazole framework 4, a precursor to our previously reported C–N–C bis(NHC) pincer ligand, bimca. We have also used 4 as a basis for constructing a library of fully characterised bis(imidazolium) salt pre-ligands which vary the steric and electronic parameters of the subsequently formed NHC moieties. Lithium bis(NHC)carbazol...

Journal: :Trends in Cancer Research and Chemotherapy 2018

Journal: :Organic & biomolecular chemistry 2015
Laura González-Mendoza Jorge Escorihuela Belén Altava M Isabel Burguete Santiago V Luis

A family of chiral bis(imidazolium) salts derived from natural amino acids has been synthesized by a simple synthetic approach and the corresponding bis(trifluoromethylsulfonyl)imide salts have been shown to be room temperature chiral ionic liquids (RTCILs). The structures and self-assembling properties of the resulting salts have been studied by (1)HNMR, ATR-FTIR, DSC, SEM and theoretical calc...

Journal: :Bulletin of The Chemical Society of Ethiopia 2021

The electrochemical behavior of 1-ferrocenylmethyl-3-(methyl)-imidazolium iodide (or mesityl) imidazolium was studied by cyclic voltammetry at glassy carbon electrode in midiums organic to determine the influences electronic group on ferrocene. experimental results indicated that redox reaction reversible. Mass transport towards is a simple diffusion process and coefficient (D) for couple has b...

Journal: :Physical chemistry chemical physics : PCCP 2011
Corine Tourné-Péteilh Jean-Marie Devoisselle André Vioux Patrick Judeinstein Martin In Lydie Viau

Interfacial tension, electrical conductivity, NMR self-diffusion and DLS experiments have been used to investigate the self-aggregation in water of ionic liquids associating an ibuprofenate anion and 1-alkyl-3-methylimidazolium [C(n)MIm](+) (n = 4, 6, 8) cations. Despite the short alkyl chain on imidazolium cations (n ≤ 8), these ionic liquids exhibit particularly low Critical Aggregation Conce...

Journal: :Dalton transactions 2013
Manuel Kaiser Sebastian P Leitner Christa Hirtenlehner Manuela List Alexander Gerisch Uwe Monkowius

The reaction of meta- and para-bromomethylene-azobenzenes with 1-methyl-imidazole yields the respective meta-/para-functionalized azobenzenes tagged with an imidazolium group. Similar reactions of ortho- and para-bromo-azobenzene with imidazole and successive quaternation with benzylbromide give the analogues, with an imidazolium group in ortho/para substituted azobenzenes. With the exception o...

2011
Ewa Liwarska-Bizukojc

Imidazolium salts are one of the most often used and investigated groups of ionic liquids (ILs). The research concerning their ecotoxicity comprised many test organisms representing different trophic levels; however, their impact on mixed cultures of microorganisms such as activated sludge has been hardly ever investigated. Thus, in this work, the effect of imidazolium ionic liquids on dehydrog...

Journal: :Chemical communications 2007
Christoph Fleckenstein Sutapa Roy Steffen Leuthäusser Herbert Plenio

Sulfonated, water-soluble imidazolium and imidazolinium salts were synthesized and the respective Pd-complexes with N,N'-bis(2,6-dialkyl-4-SO(3)(-)-phenyl)imidazol-2-ylidene and N,N'-bis(2,6-dialkyl-4-SO(3)(-)-phenyl)-4,5-dihydroimidazol-2-ylidene ligands were applied in aqueous Suzuki coupling reactions of aryl chlorides.

Journal: :Chemical communications 2013
Alba Collado Adrián Gómez-Suárez Anthony R Martin Alexandra M Z Slawin Steven P Nolan

An improved protocol for the synthesis of [Au(NHC)X] (X = Cl, Br, I) complexes is reported. This versatile one-step synthetic methodology proceeds under mild conditions, in air, using technical grade solvents, is scalable and is applicable to a wide range of imidazolium and imidazolidinium salts.

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