Synthesis, characterization, protonation studies and X-ray crystal structure of ReH5(PPh3)2(PTA) (PTA = 1,3,5-triaza-7-phosphaadamantane) (Articolo in rivista)

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  • Synthesis, characterization, protonation studies and X-ray crystal structure of ReH5(PPh3)2(PTA) (PTA = 1,3,5-triaza-7-phosphaadamantane) (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jorganchem.2005.09.045 (literal)
Alternative label
  • Bolaño, Sandra; Gonsalvi, Luca; Barbaro, Pierluigi; Albinati, Alberto; Rizzato, Silvia; Gutsul, Evgenii; Belkova, Natalia; Epstein, Lina; Shubina, Elena; Peruzzini, Maurizio (2006)
    Synthesis, characterization, protonation studies and X-ray crystal structure of ReH5(PPh3)2(PTA) (PTA = 1,3,5-triaza-7-phosphaadamantane)
    in Journal of organometallic chemistry (Print); Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bolaño, Sandra; Gonsalvi, Luca; Barbaro, Pierluigi; Albinati, Alberto; Rizzato, Silvia; Gutsul, Evgenii; Belkova, Natalia; Epstein, Lina; Shubina, Elena; Peruzzini, Maurizio (literal)
Pagina inizio
  • 629 (literal)
Pagina fine
  • 637 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 691 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ICCOM-CNR; Universita' di Milano; INEOS RAS, Russia (literal)
Titolo
  • Synthesis, characterization, protonation studies and X-ray crystal structure of ReH5(PPh3)2(PTA) (PTA = 1,3,5-triaza-7-phosphaadamantane) (literal)
Abstract
  • The novel rhenium pentahydride complex [ReH5(PPh3)2(PTA)] (2) was synthesized by dihydrogen replacement from the reaction of [ReH7(PPh3)2] with PTA in refluxing THF. Variable temperature NMR studies indicate that 2 is a classic polyhydride (T1(min) = 133 ms). This result agrees with the structure of 2, determined by X-ray crystallography at low temperature. The compound shows high conformational rigidity which allows for the investigation of the various hydride-exchanging processes by NMR methods. Reactions of 2 with equimolecular amounts of either HFIP or HBF4 Æ Et2O at 183 K afford [ReH5(PPh3)2{PTA(H)}]+ (3) via protonation of one of the nitrogen atoms on the PTA ligand. When 5 equivalents of HBF4 Æ Et2O are used, additional protonation of one hydride ligand takes place to generate the thermally unstable dication [ReH4(g2-H2)(PPh3)2{PTA(H)}]2+ (4), as confirmed by 1H NMR and T1 analysis. IR monitoring of the reaction between 2 and CF3COOD at low temperature shows the formation of the hydrogen bonded complex [ReH5(PPh3)2{PTA? ? ?DOC(O)CF3}] (5) and of the ionic pair [ReH5(PPh3)2{PTA(D)? ? ?OC(O)CF3}] (6) preceding the proton transfer step leading to 3. (literal)
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