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Volumn 20, Issue 18, 2001, Pages 3864-3868

C-H bond activation in aqueous solution: A linear free energy relationship investigation of the rate-limiting step in the H/D exchange of alcohols catalyzed by a molybdocene

Author keywords

[No Author keywords available]

Indexed keywords

BENZYL ALCOHOLS; LINEAR FREE ENERGY RELATIONSHIP; MOLYBDOCENE; RATE LIMITING STEP;

EID: 0035802158     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om010263h     Document Type: Article
Times cited : (29)

References (25)
  • 4
    • 0011595274 scopus 로고    scopus 로고
    • note
    • (a) It is interesting that of the three types of C-H bond activation (oxidative addition, σ-bond metathesis, and electrophilic subsititution), electrophilic substitution seems most prominent in protic solvents, whereas oxidative addition is well established in nonprotic, organic solvents. However, the proposed step 4 → 5-h suggests an oxidative addition in the protic solvent, water.
  • 10
    • 0011652833 scopus 로고    scopus 로고
    • note
    • eq[catalyst].
  • 11
    • 0011529952 scopus 로고    scopus 로고
    • note
    • The data from the first 2 h of heating were also fit to a linear expression to determine the initial rate of reaction. However, the precision of the data was greatly improved with the exponential decay method due to the increased number of data points for the fit.
  • 12
    • 0011530221 scopus 로고    scopus 로고
    • note
    • The initial data show small deviations from the first-order exponential decay. This slight error is likely the result of initial temperature equilibration.
  • 13
    • 0011647974 scopus 로고    scopus 로고
    • note
    • 0.
  • 14
    • 4243664295 scopus 로고
    • note
    • There is some discrepancy in the σ value for the ammonium substituent (0.66 vs 0.86), which is generally attributed to the positive charge of the ammonium. The σ values used herein are from: Hansch, C.; Leo, A.; Taft, R. W. Chem. Rev. 1991, 91, 165-195.
    • (1991) Chem. Rev. , vol.91 , pp. 165-195
    • Hansch, C.1    Leo, A.2    Taft, R.W.3
  • 17
    • 0011593171 scopus 로고    scopus 로고
    • note
    • Note that Hammett plots are typically reported without error bars.
  • 25
    • 0011530461 scopus 로고    scopus 로고
    • note
    • Note that resonance form 7 in Figure 2 is only applicable to para-substituted alcohols. However, meta-substituted alcohols with electron-donating groups would be subject to inductive stabilization of the carbocation.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.