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Volumn 63, Issue 6, 1998, Pages 1944-1953

Carbanion Stabilization by Adjacent Sulfur: Polarizability, Resonance, or Negative Hyperconjugation? Experimental Distinction Based on Intrinsic Rate Constants of Proton Transfer from (Phenylthio)nitromethane and 1-Nitro-2-phenylethane

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EID: 0000527297     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo9719463     Document Type: Article
Times cited : (69)

References (59)
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    • For reviews, see (a) Price, C. C.; Oae, S. Sulfur Bonding; Ronald Press: New York, 1962. (b) Cram, D. J. Fundamentals of Carbanion Chemistry; Academic Press: New York, 165; pp 71-84.
    • (1962) Sulfur Bonding
    • Price, C.C.1    Oae, S.2
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    • Academic Press: New York
    • For reviews, see (a) Price, C. C.; Oae, S. Sulfur Bonding; Ronald Press: New York, 1962. (b) Cram, D. J. Fundamentals of Carbanion Chemistry; Academic Press: New York, 165; pp 71-84.
    • Fundamentals of Carbanion Chemistry , vol.165 , pp. 71-84
    • Cram, D.J.1
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    • note
    • Equation 2 can be visualized as donation of the carbanion lone pair to the C-S σ* antibonding orbital.
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    • For recent reviews, see (a) Bernasconi, C. F. Ace. Chem. Res. 1987, 20, 301. (b) Bernasconi, C. F. Ace. Chem. Res. 1992, 25, 9. (c) Bernasconi, C. F. Adv. Phys. Org. Chem. 1992, 27, 119.
    • (1987) Ace. Chem. Res. , vol.20 , pp. 301
    • Bernasconi, C.F.1
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    • 0002767827 scopus 로고
    • For recent reviews, see (a) Bernasconi, C. F. Ace. Chem. Res. 1987, 20, 301. (b) Bernasconi, C. F. Ace. Chem. Res. 1992, 25, 9. (c) Bernasconi, C. F. Adv. Phys. Org. Chem. 1992, 27, 119.
    • (1992) Ace. Chem. Res. , vol.25 , pp. 9
    • Bernasconi, C.F.1
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    • For recent reviews, see (a) Bernasconi, C. F. Ace. Chem. Res. 1987, 20, 301. (b) Bernasconi, C. F. Ace. Chem. Res. 1992, 25, 9. (c) Bernasconi, C. F. Adv. Phys. Org. Chem. 1992, 27, 119.
    • (1992) Adv. Phys. Org. Chem. , vol.27 , pp. 119
    • Bernasconi, C.F.1
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    • note
    • 1 = 1 (ΔG° = 0); in proton transfers statistical factors are usually included.
  • 27
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    • note
    • See paragraph concerning Supporting Information at the end of this paper.
  • 29
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    • note
    • + while q is the number of equivalent basic sites on B.
  • 35
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    • Norton and Co.: New York
    • (c) Jones, M., Jr. Organic Chemistry; Norton and Co.: New York 1997; p 134.
    • (1997) Organic Chemistry , pp. 134
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    • note
    • 17c,31
  • 43
  • 45
    • 85034487866 scopus 로고    scopus 로고
    • note
    • 2 has only two acidic protons.
  • 46
    • 85034470693 scopus 로고    scopus 로고
    • note
    • + is symbolizing positive hyperconjugation; this symbol is used for simplicity and is meant to include bond strength effects.
  • 47
    • 85034467164 scopus 로고    scopus 로고
    • note
    • 29
  • 48
    • 85034463384 scopus 로고    scopus 로고
    • note
    • 22 It is the fact that the experimental rate constant is not enhanced as much as one would expect if the resonance effect were developed in proportion to the degree of proton transfers which leads to the reduction in the intrinsic rate constant. We add this clarification in response to a referee's comment.
  • 49
    • 85034467601 scopus 로고    scopus 로고
    • note
    • 20
  • 50
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    • note
    • 39
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    • Chapman, N. B., Shorter, J., Eds.; Plenum Press: New York
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    • (1978) Correlation Analysis in Chemistry , pp. 439
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  • 53
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    • note
    • h+ term.
  • 55
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    • note
    • W) values would be slightly higher.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.