caa a22 4500 475759850 CHVBK 20180406123547.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1009536328369 doi (NATIONALLICENCE)springer-10.1023/A:1009536328369 Synthesis and conversions of metallocycles. 22. NMR studies of the mechanism of Cp2ZrCl2-catalyzed cycloalumination of olefins with triethylaluminum to form aluminacyclopentanes [Elektronische Daten] [L. Khalilov, L. Parfenova, S. Rusakov, A. Ibragimov, U. Dzhemilev] The mechanism of cycloalumination of olefins under the action of AlEt3 in the presence of Cp2ZrCl2 giving rise to aluminacyclopentanes was investigated by dynamic 1H and 13C NMR spectroscopy. The bimetallic complex Cp2ZrEtCl-AlEt3 is formed initially and is converted into the bridged complex Cp2Zr(Cl)CH2CH2AlEt2 as a result of beta-hydride shift and elimination of the ethane molecule. The resulting complex adds a molecule of the initial olefin yielding aluminacyclopentanes. Under the action of Et2AlCl in the presence of an excess of AlEt3, zirconacyclopentanes give rise to intermediate bimetallic complexes stable at -70 °C. Under the reaction conditions, the latter compounds are converted into aluminacyclopentanes. Plenum Publishing Corporation, 2000 reaction mechanism nationallicence metal-complex catalysis nationallicence cyclometallation nationallicence aluminacyclopentanes nationallicence dynamic NMR spectroscopy nationallicence Khalilov L. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut Parfenova L. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut Rusakov S. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut Ibragimov A. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut Dzhemilev U. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/12(2000-12-01), 2051-2058 1066-5285 49:12<2051 2000 49 11172 https://doi.org/10.1023/A:1009536328369 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009536328369 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Khalilov L. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut NATIONALLICENCE 700 1- Parfenova L. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut NATIONALLICENCE 700 1- Rusakov S. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut NATIONALLICENCE 700 1- Ibragimov A. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut NATIONALLICENCE 700 1- Dzhemilev U. Institute of Petrochemistry and Catalysis, Bashkortostan Republic Academy of Sciences, Russian Federation aut NATIONALLICENCE 773 0- Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/12(2000-12-01), 2051-2058 1066-5285 49:12<2051 2000 49 11172 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer