Počet záznamů: 1  

Synthesis, structure, and fluxional behaviour of highly-substituted group 4 cyclopentadienyl arylaminate complexes

  1. 1.
    0380854 - ÚFCH JH 2013 RIV CH eng J - Článek v odborném periodiku
    Havlík, A. - Lamač, Martin - Pinkas, Jiří - Padělková, Z. - Růžička, A. - Gyepes, Robert - Horáček, Michal
    Synthesis, structure, and fluxional behaviour of highly-substituted group 4 cyclopentadienyl arylaminate complexes.
    Journal of Organometallic Chemistry. Roč. 719, November (2012), s. 64-73. ISSN 0022-328X. E-ISSN 1872-8561
    Grant CEP: GA ČR GAP106/10/0924
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: Half-sandwich complexes * Titanium Zirconium * Hafnium
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.000, rok: 2012

    The series of half-sandwich metallocenes of group 4 metals containing the C,N-chelating ligand (η5-C5Me4R)MCl2(C6H4CH2NMe2-κ2C,N) (M = Ti(1), Zr(2), Hf(3); R = Me(C), H(D)) were prepared by reacting the corresponding pentamethyl- and tetramethyl-substituted cyclopentadienylmetal trichlorides (η5-C5Me4R)MCl3 (M = Ti(1), Zr(2), Hf(3); R = Me(A), H(B)) with 2-[(dimethylamino)methyl]phenyl lithium. The X-ray crystal structure analysis of 1C–3C showed that they are isostructural/isomorphous containing two pairs of enantiomers in a P21/c unit cell, whereas crystals of 2D and 3D contained only one enantiomer in a P212121 unit cell. The presence of enantiomers in solution was resolved in variable temperature 1H NMR spectra below the temperature of signal coalescence. The transition state for interconversion of the two enantiomers for 1C was identified by DFT results to be on a 2nd order saddle point. Synthesis of η5-tetramethylcyclopentadienylmetal trichlorides 2B and 3B and their tetrameric and dimeric crystal structures are also reported.
    Trvalý link: http://hdl.handle.net/11104/0211462

     
     
Počet záznamů: 1  

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