نتایج جستجو برای: imidazolium based salts

تعداد نتایج: 2959675  

Journal: :Chemical communications 2011
Mathieu Ratel Mathieu Branca Julien Breault-Turcot Sandy Shuo Zhao Pierre Chaurand Andreea R Schmitzer Jean-Francois Masson

A simple anion metathesis in diluted aqueous carbonate at room temperature affords 1-(12-mercaptododecyl)-3-methyl-imidazolium carbonate (MDMI-HCO(3)) from MDMI salts self-assembled on gold films and nanoparticles. The properties of MDMI-SAM differ from MDMI in solution, for which the anion exchange reaction does not proceed.

Journal: :Chemical communications 2013
Renso Visbal Antonio Laguna M Concepción Gimeno

A facile and efficient synthetic route leading to catalytically relevant N-heterocyclic carbene (NHC) gold complexes is described. The method consists of one pot synthesis starting from readily available imidazolium salts and [AuCl(tht)], in the presence of K2CO3. Using the same protocol NHC silver complexes have been synthesised starting from AgNO3.

Journal: :Molecules 2012
Lan Jiang Fengjun Shan Zhengning Li Defeng Zhao

Suzuki-Miyaura coupling reactions are promoted by Pd complexes ligated with C₂-symmetric multi-dentate N-heterocyclic carbenes derived in situ from Pd(OAc)₂ and imidazolium salts. Good to excellent yields were obtained for aryl bromides as substrates. Turnover numbers of up to 10⁵ could be achieved with 5 × 10⁻⁴ mol% of Pd(OAc)₂/1 × 10⁻³ mol% NHC precatalyst in 24 h.

Journal: :Dalton transactions 2015
Claude Kiefer Sebastian Bestgen Michael T Gamer Sergei Lebedkin Manfred M Kappes Peter W Roesky

Phenylpropynyl-functionalized imidazolium salts, as well as their gold complexes, were prepared in excellent yields affording suitable starting materials for metal cluster synthesis. The reactions of these gold complexes with coinage metal phenylacetylides [M(CCPh)](x) (M = Cu, Ag) resulted in the formation of novel heterometallic hexanuclear clusters which exhibit mixed metallophillic interact...

Journal: :European Journal of Organic Chemistry 2021

In this article, we describe an efficient synthetic pathway and the characterization of liquid crystal luminescent imidazolium salts based on a naphthalene unit. The imidazolium-naphthalene rigid part is decorated with benzyl group functionalized by two or three dodecyloxy chains. A crystalline structure shows unambiguously segregation between ionic flexible parts conducive to emergence mesomor...

Journal: :Dalton transactions 2016
Kai Schwedtmann Robin Schoemaker Felix Hennersdorf Antonio Bauzá Antonio Frontera Robert Weiss Jan J Weigand

2-Phosphanyl-substituted imidazolium salts 2-PR2(4,5-Cl-Im)[OTf] (9a,b[OTf]) (4,5-Cl-Im = 4,5-dichloro-1,3-bis(2,6-di-isopropylphenyl)-imidazolium) (a: R = Cy, b: R = Ph) are prepared from the reaction of R2PCl (R = Cy, Ph) with NHC 8 (4,5-dichloro-1,3-bis(2,6-di-isopropylphenyl)-imidazolin-2-ylidene) in the presence of Me3SiOTf. 5-Phospanyl-substituted imidazolium salts 5-PR2(2,4-Cl-Im)[OTf] (...

Journal: :Chemical communications 2011
Bin Liu Yin Zhang Daichao Xu Wanzhi Chen

A novel electrochemical procedure for the preparation of metal complexes of N-heterocyclic carbenes using imidazolium salts or corresponding silver-NHC complexes as carbene sources and electrolytes, and metal plates as the sacrificial anodes is described. The procedure is simple and good yielding without the use of expensive or air-sensitive reagents.

Journal: :Dalton transactions 2013
Marcel Brill Erik Kühnel Corina Scriban Frank Rominger Peter Hofmann

Bulky and electron-rich N-phosphinomethyl-substituted N-heterocyclic carbene transition metal complexes have been prepared in a short and efficient protocol. The modular synthesis allows one to convert borane-protected phosphino-functionalized imidazolium salts into their corresponding metal chelate complexes in a one-pot procedure.

Journal: :Dalton transactions 2014
Polly L Arnold Nicola L Bell Isobel H Marr Siyi She Jonathan Hamilton Craig Fraser Kai Wang

A set of β-ketoimidazolium and β-ketoimidazolinium salts of the general formula [R(1)C(O)CH2{CH[NCR(3)CR(3)N(R(2))]}]X (R(1) = (t)Bu, naphth; R(2) = (i)Pr, Mes, (t)Bu; R(3) = H, Me, (H)2; X = Cl, Br) show contrasting reactivity with superhydride bases MHBEt3; two are reduced to chiral β-alcohol carbene-boranes R(1)CH(OH)CH2{C(BEt3)[NCR(3)CR(3)N(R(2))]} 2 (R(1) = (t)Bu; R(2) = (i)Pr, Mes; R(3) =...

Journal: :Chemical communications 2012
Julien Haumesser Jean-Paul Gisselbrecht Jean Weiss Romain Ruppert

The preparation of two meso-imidazolylporphyrins was achieved in good yield by Ullmann coupling between a meso-bromotriarylporphyrin and imidazoles. Subsequent alkylation afforded the corresponding imidazolium functionalized porphyrins as direct precursors of the carbene. The complexation of these azolium salts with palladium led to trans-anti bis-porphyrin carbenic complexes.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید