Počet záznamů: 1

Synthesis and Fluxional Behavior of New "Haevy Fluorous" Cyclopentadienes.

  1. 1.
    0341109 - UCHP-M 2010 RIV CH eng J - Článek v odborném periodiku
    Červenková Šťastná, Lucie - Čermák, Jan - Cuřínová, Petra - Sýkora, Jan
    Synthesis and Fluxional Behavior of New "Haevy Fluorous" Cyclopentadienes.
    Journal of Organometallic Chemistry. Roč. 695, č. 4 (2010), s. 537-545 ISSN 0022-328X
    Grant CEP: GA AV ČR IAA400720706; GA MŠk(CZ) LC06070
    Výzkumný záměr: CEZ:AV0Z40720504
    Klíčová slova: heavy fluorous * cyclopentadiene * polyfluoroalkylsilane
    Kód oboru RIV: CC - Organická chemie
    Impakt faktor: 2.205, rok: 2010

    The new heavy fluorous cyclopentadienes C5H6-n[M(C2H4C6F13)3]n (M = Si, n = 1 (3); n = 2 (4) and M = Sn, n = 1 (10)) were synthesized by reaction of cyclopentadienyl lithium with BrSi(C2H4C6F13)3 (2) or BrSn(C2H4C6F13)3. Fluorous cyclopentadienes prepared in this manner contain three or six C6F13 groups, which significantly increase their solubility in perfluorinated solvents. They also provide intermediates for titanium complexes suitable for fluorous biphase catalysis. All three isomers of silylcyclopentadienes 3 and 4 were identified and fully characterized by two dimensional NMR spectroscopy, which was performed at low temperature. The allylic isomers 3a and 4a undergo degenerate metallotropic rearrangement. This fluxional behaviour was compared with the behaviour of previously prepared cyclopentadienes 6 and 7 (C5H6-n[SiMe2(C2H4C8F17)]n where n = 1, 2, respectively).
    Trvalý link: http://hdl.handle.net/11104/0184195