نتایج جستجو برای: heterocyclic carbenes
تعداد نتایج: 9891 فیلتر نتایج به سال:
Gold nanoparticles (AuNPs) are employed in numerous applications, including optics, biosensing, and catalysis. In their Communication (e202212459), Petra S. Dittrich et al. demonstrate the stabilizer-free electrochemical synthesis of AuNPs inside nanoliter-sized reactors. with sizes range 30 to 100 nm were produced without need for additional capping agents. This method opens way fine-tune prod...
Gold nanoparticles (AuNPs) are employed in numerous applications, including optics, biosensing, and catalysis. In their Communication (e202212459), Petra S. Dittrich et al. demonstrate the stabilizer-free electrochemical synthesis of AuNPs inside nanoliter-sized reactors. with sizes range 30 to 100 nm were produced without need for additional capping agents. This method opens way fine-tune prod...
The reaction of 1-amino,4-hydroxy-pentiptycene with diacetyl or acenaphthene-1,2-dione gave the respective diimines, followed by alkylation of the hydroxyl groups, and cyclization of the alkylated diimines to the respective bispentiptycene-imidazolium salts NHC·HCl. The azolium salts, being precursors to N-heterocyclic carbenes, were converted into metal complexes [(NHC)MX] (MX = CuI, AgCl, AuC...
The well-known diphosphadiazane-1,3-diyl [P(μ-NTer)]2 (Ter = 2,6-bis(2,4,6-trimethyl-phenyl)-phenyl) was treated with Lewis bases such as N-heterocyclic carbenes and Lewis acids e.g. gold(i) chloride complexes. In the reaction with the Lewis base, fragmentation of the P2N2 framework was observed, yielding a salt of the type [(NHC)2P](+)[(TerN)2P](-) in a clean reaction. The reaction of [P(μ-NTe...
The synthesis of copper and silver silyl complexes containing either N-heterocyclic carbenes or nitrogen donors is described. Alterations made to both the neutral donor ligands as well as the silyl group provided access to a number of different compounds. Many of the complexes synthesized were studied in the solid state and the effect of the donor ligand on the final structure of the complexes ...
The synthesis of several electron poor allenes bearing electron withdrawing substituents is described and their use as Lewis acids in the field of frustrated Lewis pair (FLP) chemistry reported. At room temperature the combination of N-heterocyclic carbenes (NHC) with the allenes under study invariably afforded the corresponding Lewis adducts; however, at -78 °C this reaction is in most of the ...
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