Results 31 to 40 of about 14,653 (264)

The Synthesis of Some Perhydrobenzimidazolinium Salts and Their Application in Pd-Carbene Catalyzed Heck and Suzuki Reactions

Molecules, 2009
Novel 1,3-dialkylperhydrobenzimidazolinium chloride salts were prepared as precursors of N-heterocyclic carbenes 3a-e by reacting N,N’-dialkylcyclohexandiamine, triethyl orthoformate and ammonium chloride.
Murat Yiğit
doaj   +1 more source

[(1,2,5,6-η)-Cycloocta-1,5-diene](4-isopropyl-1-methyl-1,2,4-triazol-5-ylidene)(triphenylphosphane)iridium(I) tetrafluoridoborate dichloromethane 0.8-solvate

IUCrData, 2023
A new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetrafluoridoborate counter-anion, [Ir(C8H12)(C18H15P)(C6H11N3)]BF4·0.8CH2Cl2, has been synthesized and structurally characterized.
Troy E. Smith, Andrei V. Astashkin, Daniel R. Albert, Edward Rajaseelan   +3 more
doaj   +1 more source

Platinum nanoparticles stabilized by N-heterocyclic thiones. Synthesis and catalytic activity in mono- and di-hydroboration of alkynes [PDF]

, 2020
N-Heterocyclic Thiones (NHT) proved to be efficient ligands for the stabilization of small platinum nanoparticles (1.3-1.7 nm), synthesized by decomposition of [Pt(dba)2], under a H2 atmosphere, in the presence of variable sub-stoichiometric amounts of ...
Conejero, Salvador, Espinós Manzorro, Juan Pedro, Figueiredo, Rute C., Franconetti García, Antonio, Jaime, Carlos, Lacroix, Bertrand, Lara Muñoz, Patricia, Moraes Teixeira, Leonardo César de, Vattier Lagarrigue, María Florencia   +8 more
core   +1 more source

Azetidinylideneketenimines as a Multimodal Synthetic Platform: Coordination Chemistry and Cycloaddition‐Triggered Transformations

Angewandte Chemie, EarlyView.
Cross‐coupling/homologation sequence between a stable three‐membered‐ring carbene and isocyanides enables facile and rapid access to novel methyleneketenimines and the first bis(methyleneketenimine). Reactivity studies gave rise to the first methyleneketenimine‐transition metal complexes, unique multimodal reactivity ranging from CO2, isocyanate ...
Taichi Koike, Keisuke Ito, Shintaro Ishida, Takeaki Iwamoto   +3 more
wiley   +2 more sources

N-Heterocyclic carbene/Brønsted acid cooperative catalysis as a powerful tool in organic synthesis

Beilstein Journal of Organic Chemistry, 2012
The interplay between metals and N-heterocyclic carbenes (NHCs) has provided a window of opportunities for the development of novel catalytic strategies within the past few years.
Rob De Vreese, Matthias D’hooghe
doaj   +1 more source

Electrochemical deposition of N-heterocyclic carbene monolayers on metal surfaces

Nature Communications, 2020
N-heterocyclic carbenes (NHCs) have been widely used for the formation of monolayers but self-assembly methods come with drawbacks such as need for dry environment or using specifically-synthesized precursors.
Einav Amit, Linoy Dery, Shahar Dery, Suhong Kim, Anirban Roy, Qichi Hu, Vitaly Gutkin, Helen Eisenberg, Tamar Stein, Daniel Mandler, F. Dean Toste, Elad Gross   +11 more
doaj   +1 more source

Latent olefin metathesis catalysts [PDF]

, 2009
Olefin metathesis is a versatile synthetic tool for the redistribution of alkylidene fragments at carbon-carbon double bonds. This field, and more specifically the development of task-specific, latent catalysts, attracts emerging industrial and academic ...
Drozdzak, Renata, Lozano Vila, Ana, Monsaert, Stijn, Van Der Voort, Pascal, Verpoort, Francis   +4 more
core   +2 more sources

Stable Synapse‐Like Memory Switching in N‐Heterocyclic Carbene Monolayers

Angewandte Chemie, EarlyView.
We report a redox‐active N‐heterocyclic carbene (NHC) monolayer showing synapse‐like behavior via proton‐coupled electron transfer (PCET). These quinone‐functionalized NHCs form dense self‐assembled monolayers and highly stable molecular junctions. Bias‐driven PCET switches quinone/hydroquinone states, producing reversible hysteresis and spike‐timing ...
Ankita Das, Alessandro Borrini, Christian Gutheil, Björn Braunschweig, Billura Shakhayeva, Georgios Katsoukis, Ab F. Nieuwenhuis, Raka Ahmed, Susanne Leitherer, Gemma C. Solomon, Frank Glorius, Christian A. Nijhuis   +11 more
wiley   +2 more sources

Syntheses of Sterically Shielded Stable Carbenes of the 1,2,4-Triazole Series and their Corresponding Palladium Complexes: Efficient Catalysts for Chloroarene Hydrodechlorination [PDF]

, 2014
The new sterically shielded 1,3,4-trisubstituted 1,2,4-triazol-5-ylidenes 8b-d were synthesized by a three step method starting from 2-phenyl-1,3,4-oxadiazole.
Butorac, Rachel R., Cowley, Alan H., Evans, Daniel A., Glinyanay, Nataliya V., Korotkikh, Nikolai I., Pekhtereva, Tatyana M., Popov, Anatolii F., Saberov, Vagiz S., Shvaika, Oles P.   +8 more
core   +1 more source

Homoleptic and Heteroleptic Carbones L1‐C‐L2

Angewandte Chemie, EarlyView.
DFT and CCSD(T) calculations reveal that heteroleptic carbones L₁–C–L2 are thermodynamically stable species even with a weakly binding donor such as N2. Bond strengths show no simple correlation with bond lengths. Weaker carbon‐ligand bonds in homoleptic complexes L1─C─L1 are mostly strengthened in heteroleptic carbons L1─C─L2, while stronger bonds L2 ...
Ya Hu, Jiayi Chen, Qin Ma, Lili Zhao, Gernot Frenking   +4 more
wiley   +2 more sources