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Synthesis and structure of the first discrete dinuclear cationic aluminum complexes

Abstract : The reactions of the charge neutral dinuclear aluminum tetraalkyl complexes of di-Schiff base ligands, i.e. [AlMe2_ON₋R-_ON_AlMe2] (1a, R = 1,3-propylene; 1b, R = 1,3-cyclohexylene) with B(C6F5)3 and [H(Et2O)2]+[H2N_B(C6F5)3₂]- were investigated. When B(C6F5)3 was used as the cationizing agent (1 or 2 equiv. vs. Al), only monocationic dinuclear complexes [2a,b]+[MeB(C6F5)3]- were obtained. In contrast, with [H(Et2O)2]+[H2N_B(C6F5)3₂]-, both mixed-dicationic [3a,b·(OEt2)2]2+[MeB(C6F5)3]-[H2N_B(C6F5)3₂]- and homo-dicationic [3a,b·(OEt2)2]2+[H2N_B(C6F5)3₂]- 2 ion-pairs were prepared. All cationic complexes were characterized by 1H, 13C, 19F and 11B NMR spectroscopy, and an X-ray diffraction study was performed for [3b·(OEt2)2]2+[H2N_B(C6F5)3₂]- 2. © 2016 The Royal Society of Chemistry.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01367201
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Submitted on : Thursday, September 15, 2016 - 5:16:40 PM
Last modification on : Friday, July 10, 2020 - 4:10:35 PM

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X. Wang, V. Dorcet, Y. Luo, J.-F. Carpentier, E. Kirillov. Synthesis and structure of the first discrete dinuclear cationic aluminum complexes. Dalton Transactions, Royal Society of Chemistry, 2016, 45 (31), pp.12346--12351. ⟨10.1039/c6dt02360f⟩. ⟨hal-01367201⟩

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