Results 21 to 30 of about 13,617,516 (263)

Self-assembly of N-heterocyclic carbenes on Au(111)

open access: yesNature Communications, 2021
Although N-heterocyclic carbenes (NHCs) are a promising class of ligands for forming robust self-assembled monolayers on metals, many questions remain about their behavior on surfaces.
Alex Inayeh   +7 more
doaj   +1 more source

Direct estimate of the internal π-donation to the carbene centre within N-heterocyclic carbenes and related molecules

open access: yesBeilstein Journal of Organic Chemistry, 2015
Fifteen cyclic and acylic carbenes have been calculated with density functional theory at the BP86/def2-TZVPP level. The strength of the internal X→p(π) π-donation of heteroatoms and carbon which are bonded to the C(II) atom is estimated with the help of
Diego M. Andrada   +3 more
doaj   +1 more source

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

open access: yesIUCrData, 2023
The synthesis and crystal structure of a new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetrafluoridoborate counter-anion and solvating dichloromethane, [Ir(C8H12)(C7H13N3)(C18H15P)]BF4·1.5CH2Cl2, is reported. The IrI center
Aaron Maynard   +3 more
doaj   +1 more source

A persistent P,N-heterocyclic carbene [PDF]

open access: yesChemical Communications, 2008
Conjugate acids of cyclic (amino)(phosphino)carbenes (P-NHCs) have been prepared, and several different processes have been observed during their deprotonation, which include the formation of a metastable P-NHC, an azomethine ylide, and a bicyclic phosphirane.
Guido D, Frey   +5 more
openaire   +2 more sources

[(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

open access: yesIUCrData, 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   +3 more
doaj   +1 more source

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

open access: yesMolecules, 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

Synthesis of Platinum(II) N-Heterocyclic Carbenes Based on Adenosine

open access: yesMolecules, 2021
Organometallic derivatization of nucleosides is a highly promising strategy for the improvement of the therapeutic profile of nucleosides. Herein, a methodology for the synthesis of metalated adenosine with a deprotected ribose moiety is described ...
Maria Inês P. S. Leitão   +3 more
doaj   +1 more source

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

open access: yesBeilstein 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

open access: yesNature 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   +11 more
doaj   +1 more source

N-Heterocyclic carbene-catalyzed oxidations [PDF]

open access: yesTetrahedron, 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   +3 more
openaire   +2 more sources

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