Results 21 to 30 of about 25,864 (264)

Aryl radical-mediated N-heterocyclic carbene catalysis

Nature Communications, 2021
Use of aryl halides as coupling precursors typically occurs through transition metal catalysis and/or photoredox chemistry, which requires some combination of light, metals, and oxidants or reductants.
Yuki Matsuki, Nagisa Ohnishi, Yuki Kakeno, Shunsuke Takemoto, Takuya Ishii, Kazunori Nagao, Hirohisa Ohmiya   +6 more
doaj   +1 more source

A Stable Four-Membered N-Heterocyclic Carbene

, 2016
The synthesis of the first four-membered N-heterocyclic carbene is described. Depending on the substituents on the nitrogen atoms, it is possible to characterize at room temperature the carbene dimer or the free carbene.
Emmanuelle Despagnet-Ayoub (1514353), Robert H. Grubbs (1318044)   +1 more
core   +4 more sources

3,3′-Di-n-butyl-1,1′-(p-phenylenedimethylene)diimidazolium bis(hexafluorophosphate)

Acta Crystallographica Section E, 2010
The asymmetric unit of the title N-heterocyclic carbene compound, C22H32N42+·2PF6−, consists of one half of the N-heterocyclic carbene dication and one hexafluorophosphate anion.
Rosenani A. Haque, Abbas Washeel, S. Fatimah Nasri, Chin Sing Yeap, Hoong-Kun Fun   +4 more
doaj   +1 more source

N-Heterocyclic carbene-catalyzed oxidations [PDF]

Tetrahedron, 2009
N-Heterocyclic carbenes catalyze the oxidation of allylic and benzylic alcohols as well as saturated aldehydes to esters with manganese(IV) oxide in excellent yields. A variety of esters can be synthesized, including protected carboxylates. The oxidation proceeds under mild conditions, with low loadings of a simple triazolium salt pre-catalyst in the ...
Brooks E, Maki, Audrey, Chan, Eric M, Phillips, Karl A, Scheidt   +3 more
openaire   +2 more sources

Highly ordered N-heterocyclic carbene monolayers on Cu(111)

, 2021
The benzannulated N-heterocyclic carbene, 1,3-dibenzylbenzimidazolylidene (NHCDBZ) forms large, highly ordered domains when adsorbed on a Cu(111) surface under ultrahigh vacuum conditions.
Ishwar, Singh, Christopher, Baddeley, Herbert, Früchtl, Hugh, Horton, Federico, Grillo, Alex, Veinot, Eloise, Angove, Cathleen, Crudden   +7 more
core   +1 more source

Electrochemical Deposition of Addressable N-Heterocyclic Carbene Monolayers

, 2020
Herein, we introduce an electrochemical based approach for surface-anchoring of N-heterocyclic carbene (NHC) monolayers. The deposition process is based on in-situ formation of hydroxide ions by water reduction under negative potential.
F. Dean, Toste, Qichi, Hu, Anirban, Roy, Elad, Gross, Einav, Amit, Shahar, Dery, Suhong, Kim   +6 more
core   +1 more source

(Bis{2-[3-(2,4,6-trimethylbenzyl)imidazolin-2-yliden-1-yl-κC2]-4-methylphenyl}amido-κN)chloridopalladium(II)

Acta Crystallographica Section E, 2010
The coordination geometry about the Pd centre in the title compound, [Pd(C40H42N5)Cl], is approximately square-planar. The CNC pincer-type N-heterocyclic carbene ligand binds to the Pd atom in a tridentate fashion by the amido N atom and the two carbene ...
Guan-Jun Cheng, Wei Wei, Chuang Zhou, Mei-Ming Luo   +3 more
doaj   +1 more source

N-Heterocyclic Carbene-Catalyzed Atroposelective Synthesis of N-N Axially Chiral 3-Amino Quinazolinones

, 2023
Although the atroposelective synthesis of biaryls and related compounds bearing axially chiral C-C bonds are well-known, the synthesis of axially chiral C-N bond-containing compounds are relatively less explored, and the construction of axially chiral N ...
Sayan, Shee, Akkattu, Biju, Niket, Manoj, Kuruva, Balanna, Shilpa, Barik, Soumen, Barik, Rajesh, Gonnade   +6 more
core   +1 more source

Experimental and theoretical investigations on the high-electron donor character of pyrido-annelated N-heterocyclic carbenes

Beilstein Journal of Organic Chemistry, 2016
Rh(CO)2Cl(NHC) complexes of dipyrido-annelated N-heterocyclic carbenes were prepared. From the C–H coupling constant of the respective imidazolium salts and the N–C–N angle of the N-heterocyclic carbene (NHC), a weaker σ-donor character than that of ...
Michael Nonnenmacher, Dominik M. Buck, Doris Kunz   +2 more
doaj   +1 more source

The Potential of N-Heterocyclic Carbene Complexes as Components for Electronically Active Materials

CHIMIA, 2010
The application of N-heterocyclic carbene complexes as active sites in materials other than catalysis has been remarkably scarce. Inspired by the – often misleading – 'carbene' label, which implies a substantial degree of M=C ?
Oliver Schuster, Laszlo Mercs, Martin Albrecht   +2 more
doaj   +1 more source