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- W2038694015 abstract "A method for the synthesis and isolation of 1,1′-methylene-bis-(3-aryl-imidazol-2-ylidene) ligands, aryl = 2,6-diisopropyl-phenyl (DiPP), LDiPP, mesityl (mes), Lmes, is reported, which provides synthetically useful quantities of high purity. Derivatisation of LDiPP with chalcogenides gave the adducts LDiPPE2, E = S, Se, Te. Reaction of LDiPP with [Pd(tmeda)Me2], [Pt(μ-SMe2)Me2]2, [Ir(1,5-COD)(μ-Cl)]2/KPF6 and [NiBr2(dme)] gave [Pd(LDiPP)Me2] (1), [Pt(LDiPP)Me2] (2), [Ir(LDiPP)(1,5-COD)](PF6) (3) and [Ni(LDiPP)Br2] (4), respectively. The latter was reduced in the presence of CO to [Ni(LDiPP)(CO)2] (5). The structures of Lmes, LDiPPTe2, and 1–5 are also reported. Nous décrivons une méthode de synthèse des ligands bis-carbènes 1,1′-méthylène-bis-(3-aryl-imidazol-2-ylidène) (aryl = 2,6-diisopropyl-phényl (DiPP), LDiPP; mésityl (mes), Lmes) qui permet de les isoler en grandes quantités et haute purité. La réaction de LDiPP avec les chalcogénures a conduit aux dérivés LDiPPE2, E = S, Se, Te. Les réactions de LDiPP avec [Pd(tmeda)Me2], [Pt(μ-SMe2)Me2]2, [Ir(1,5-COD)(μ-Cl)]2/KPF6 et [NiBr2(dme)] ont donné respectivement [Pd(LDiPP)Me2] (1), [Pt(LDiPP)Me2] (2), [Ir(LDiPP)(1,5-COD)](PF6) (3) et [Ni(LDiPP)Br2] (4). Ce dernier fut réduit en présence de CO en [Ni(LDiPP)(CO)2] (5). Les structures de Lmes, LDiPPTe2, and 1-5 sont également décrites." @default.
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- W2038694015 date "2013-06-01" @default.
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- W2038694015 title "Synthesis of bis N-heterocyclic carbenes, derivatives and metal complexes" @default.
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- W2038694015 doi "https://doi.org/10.1016/j.crci.2013.01.016" @default.
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