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X-ray diffraction, PGSE diffusion, and related NMR studies on a series of Cp*-based Ru(IV)(Cp*)(η-CH-CH-CHPh) allyl complexes

Organometallics, ISSN: 0276-7333, Vol: 25, Issue: 19, Page: 4520-4529
2006
  • 28
    Citations
  • 0
    Usage
  • 13
    Captures
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    Mentions
  • 0
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    28
    • Citation Indexes
      28
  • Captures
    13

Article Description

The new ruthenium (IV) allyl complexes [Ru(Cp*)Cl(DMF) (η-CH-CH-CHPh)](PF) (2b) and [Ru-(Cp*)Cl(t-BuCN)(η-CH-CH-CHPh)](PF ) (2c) have been prepared and their structures determined. These results are compared with the analogous X-ray data for [Ru(Cp*)Cl(CH CN)(η-CH-CH-CHPh)]-(PF ),[Ru(Cp*){OC(O-t-Bu)O}(η-CH -CH-CHPh)](PF),[Ru(Cp*)(CHCN) (η-CH-CH-CHPh)]-(PF) and [Ru(Cp*)(DMF)(η-CH -CH-CHPh)](PF). In all of the structures, the Ru-((η-CH-CH-CHPh) moiety is markedly distorted such that Ru-CPh(allyl) separation is much longer than the remaining two Ru-C(allyl) distances. The DMF and acetonitrile ligands are shown to exchange on the NMR time scale via both variable-temperature and 2-D exchange spectroscopy. Pulsed gradient spin-echo (PGSE) diffusion and H,F HOESY NMR methods show that there is relatively little ion pairing in these salts in DMF and acetonitrile solutions. The PF anions take up specific positions with respect to the Ru(IV) cations. © 2006 American Chemical Society.

Bibliographic Details

Ignacio Fernández; Paul S. Pregosin; Alberto Albinati; Silvia Rizzato

American Chemical Society (ACS)

Chemistry

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