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• W2121160906 endingPage "9211" @default.
• W2121160906 startingPage "9211" @default.
• W2121160906 abstract "A monoanionic amido–imino ligand system [(2,6-iPr2C6H3)NC(Me)C(CH2)N(C6H3-2,6-iPr2)]− was successfully employed for the synthesis of monomeric dichloro [(2,6-iPr2C6H3)NC(Me)C(CH2)N(C6H3-2,6-iPr2)]LnCl2(THF)2 (Ln = Y, 2Y; Lu, 2Lu) and bis(alkyl) [(2,6-iPr2C6H3)NC(Me)C(CH2)N(C6H3-2,6-iPr2)]Ln(CH2SiMe3)2(THF) (Ln = Y, 4Y; Lu, 4Lu) species of yttrium and lutetium. Dichloro complexes 2Y and 2Lu turned out to be unstable in aromatic solvents. The ligand symmetrization reaction in the case of 2Y affords the yttrium complex coordinated by dianionic [(2,6-iPr2C6H3)NC(CH2)C(CH2)N(C6H3-2,6-iPr2)]2− ligand, (2,6-iPr2C6H3)NC(Me)C(Me)N(C6H3-2,6-iPr2) and YCl3. On the contrary, bis(alkyl) species 4Y and 4Lu are rather stable and do not undergo such a transformation or thermal decomposition. The treatment of complex 4Y with DME resulted in C–O bond cleavage and the formation of a dimeric methoxy-alkyl species {[(2,6-iPr2C6H3)NC(Me)C(CH2)N(C6H3-2,6-iPr2)]Y(CH2SiMe3)(μ-OMe)}2 (5). The ternary systems 4Ln/AliBu3/borate (borate = [HNMe2Ph][B(C6F5)4] and [CPh3][B(C6F5)4]; molar ratio 1 : 10 : 1) performed high catalytic activity in isoprene polymerization and ability to convert into polymer 1000–5000 equivalents of isoprene in 20–120 min with quantitative conversion. The obtained polyisoprenes possessed high molecular weights (2.9 × 104–4.1 × 104) and moderate polydispersities (2.14–3.52). Predominant 3,4-regioselectivity (up to 78%) was observed." @default.
• W2121160906 created "2016-06-24" @default.
• W2121160906 creator A5005923402 @default.
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• W2121160906 creator A5059175967 @default.
• W2121160906 creator A5072554887 @default.
• W2121160906 creator A5072854896 @default.
• W2121160906 date "2013-01-01" @default.
• W2121160906 modified "2023-09-26" @default.
• W2121160906 title "Rare-earth dichloro and bis(alkyl) complexes supported by bulky amido–imino ligand. Synthesis, structure, reactivity and catalytic activity in isoprene polymerization" @default.
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• W2121160906 doi "https://doi.org/10.1039/c3dt33108c" @default.
• W2121160906 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23511720" @default.
• W2121160906 hasPublicationYear "2013" @default.
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