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Volumn 2, Issue 2, 2011, Pages 326-330

O2 insertion into a palladium(II)-hydride bond: Observation of mechanistic crossover between HX-reductive-elimination and hydrogen-atom-abstraction pathways

Author keywords

[No Author keywords available]

Indexed keywords

AEROBIC OXIDATIONS; ATOM ABSTRACTION; COMPUTATIONAL STUDIES; ELECTRON-DONATING; ELECTRON-RICH; ELECTRONWITHDRAWING; HAMMETT PLOTS; INSERTION REACTIONS; KINETIC STUDY; NON-LINEAR; PARALLEL MECHANISMS; RATE LIMITING; REDUCTIVE ELIMINATION;

EID: 79954481454     PISSN: 20416520     EISSN: 20416539     Source Type: Journal    
DOI: 10.1039/c0sc00392a     Document Type: Article
Times cited : (71)

References (48)
  • 4
    • 24944468108 scopus 로고    scopus 로고
    • S. S. Stahl, Science, 2005, 309, 1824-1826
    • (2005) Science , vol.309 , pp. 1824-1826
    • Stahl, S.S.1
  • 43
    • 79955654051 scopus 로고    scopus 로고
    • Note
    • The oxygenation rates were determined by the method of initial rates. We have shown previously that hydrogen bond donors, including the Pd-OOH product, accelerate the rate of oxygenation and lead to non-exponential decay of the Pd-H species in reactions of this type. For further discussion and characterization of this effect, see: ref. 2g.
  • 44
    • 26844490455 scopus 로고    scopus 로고
    • 4OMe) had no effect on the reaction rate, and, as described in ref. 2g, allowed us to obtain full exponential reaction timecourses for 1e
    • 2CC6H4OMe), was synthesized through an established literature procedure from tetrabutylammonium hydroxide and para-methoxybenzoic acid: Y. Sato, H. Fujisawa and T. Mukaiyama, Chem. Lett., 2005, 34, 1188-1189.
    • (2005) Chem. Lett , vol.34 , pp. 1188-1189
    • Sato, Y.1    Fujisawa, H.2    Mukaiyama, T.3
  • 45
    • 79955654379 scopus 로고    scopus 로고
    • Note
    • 2]-dependence HAA pathway becomes much more pronounced at lower temperatures, as implied by the Hammett plot in Fig. 2. Note
  • 46
    • 79955664748 scopus 로고    scopus 로고
    • Note
    • Computational method: All computations were performed with the Gaussian 03 program. Geometry optimizations were performed using the B3LYP functional with the Stuttgart RSC 1997 ECP basis set for Pd and 6-31G for all other atoms. Spin-unrestricted methodology was used for the calculations. At the calculated stationary points, solvation-corrected single-point-energy calculations were carried out with the Pd basis detailed above and the 6-311G basis for all other atoms. These calculations were used to predict the solvation free energy close to experimental conditions (toluene solvent at 50 °C). Note
  • 47
    • 79955664917 scopus 로고    scopus 로고
    • Note
    • 1). See ref. 2e for further details. Note
  • 48
    • 79955652156 scopus 로고    scopus 로고
    • Note
    • ‡ values (Figs. S3 and S4). The scatter introduced by the calculated ΔS‡ values is also cancelled in the plot of ΔΔG‡ vs. p (Fig. 5B). See the supplementary information for details Note


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