Anionic N-heterocyclic carbenes derived from sydnone imines such as molsidomine. Trapping reactions with selenium, palladium, and gold
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DOI: 10.1016/j.tet.2017.07.032
Abstract: Abstract The sydnone imines Molsidomine and 5-(benzoylimino)-3-(2-methoxyphenyl)-1,2,3-oxadiazolium-2-ide gave anionic N-heterocyclic carbenes on deprotonation at C4 which were trapped as methylated selenium adducts, gold complexes (X-ray analysis) as well as palladium complexes (X-ray analysis). The 13C… read more here.
Keywords: heterocyclic carbenes; imines molsidomine; anionic heterocyclic; palladium ... See more keywords
Cycloadditions of anionic N-heterocyclic carbenes of sydnone imines
Sign Up to like & getrecommendations! Published in 2019 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2019.04.006
Abstract: Abstract Sydnone imines were deprotonated with lithium bis(trimethylsilyl)amide at the C4 position to give the corresponding sydnone imine anions as lithium adducts. These can be represented as lithium stabilized anionic N-heterocyclic carbenes. Treatment with diisopropyl… read more here.
Keywords: heterocyclic carbenes; sydnone imine; anionic heterocyclic; cycloadditions anionic ... See more keywords
From Chelating to Bridging Ligands: N-Sulfonyliminoimidazolium Ylides as Precursors to Anionic N-Heterocyclic Carbene Ligands
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DOI: 10.1021/acs.organomet.8b00764
Abstract: The synthesis and investigation of a new family of anionic N-heterocyclic carbene (NHC) ligands, based on N-sulfonyliminoimidazolium ylides, is reported. Their corresponding silver complexes have been synthesized and present distinctive geometries compared to the previously… read more here.
Keywords: chelating bridging; bridging ligands; anionic heterocyclic; sulfonyliminoimidazolium ylides ... See more keywords
Anionic N-heterocyclic carbenes featuring weakly coordinating perfluoroalkylphosphorane moieties.
Sign Up to like & getrecommendations! Published in 2023 at "Dalton transactions"
DOI: 10.1039/d3dt01249b
Abstract: The anionic 1-methyl-3-(tris(pentafluoroethyl)difluorophosphorane)imidazoline-2-ylidenate 3 and the 1,3-bis(tris(pentafluoroethyl)difluorophosphorane)imidazoline-2-ylidenate dianion 4 were obtained in high yield by deprotonation of {(C2F5)3PF2}-methylimidazole 1 and the {(C2F5)3PF2}2-imidazolate anion 2. Carbenes 3 and 4 are first examples for a novel class… read more here.
Keywords: featuring weakly; anionic heterocyclic; carbenes featuring; coordinating perfluoroalkylphosphorane ... See more keywords
Mercury(II) Complexes of Anionic N-Heterocyclic Carbene Ligands: Steric Effects of the Backbone Substituent
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DOI: 10.3390/molecules25163741
Abstract: Mercury(II) complexes (Me-maloNHCDipp)HgCl (1b), (t-Bu-maloNHCDipp)HgCl (2b) and (t-Bu-maloNHCDipp)HgMe (2c) supported by anionic N-heterocyclic carbenes have been obtained in good yields from the reaction of the potassium salt of N-heterocyclic carbene ligand precursors and mercury(II) salts,… read more here.
Keywords: mercury complexes; anionic heterocyclic; backbone substituent; malonhcdipp hgcl ... See more keywords