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Volumn 68, Issue 20, 2003, Pages 7871-7879

Effects of Si substitution on the Ei reaction of alkyl sulfoxides

Author keywords

[No Author keywords available]

Indexed keywords

ELIMINATION REACTION;

EID: 0141542744     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo034690b     Document Type: Article
Times cited : (11)

References (76)
  • 20
    • 0001529764 scopus 로고    scopus 로고
    • Jursic, B. S. THEOCHEM 1997, 389, 257-263.
    • (1997) THEOCHEM , vol.389 , pp. 257-263
    • Jursic, B.S.1
  • 38
    • 0141446096 scopus 로고    scopus 로고
    • Hehre, W. 3.1 ed.; Wavefunction, Inc., 18401 Von Karman Ave., Irvine, CA, 1994
    • Hehre, W. 3.1 ed.; Wavefunction, Inc., 18401 Von Karman Ave., Irvine, CA, 1994.
  • 47
    • 0141780938 scopus 로고    scopus 로고
    • note
    • The difference is 0 for the products, as they are identical.
  • 51
    • 0141446094 scopus 로고    scopus 로고
    • note
    • This relationship draws from evidence that the angular dependence of the deuterium kinetic isotop effect and C-H NMR coupling constants follow the same dependence and is similar to arguments made about the strength of twisted π-bonds.
  • 52
    • 0141557652 scopus 로고    scopus 로고
    • note
    • This is based on the rate enhancement of the protonation of silylacetylenes.
  • 56
    • 0141669034 scopus 로고    scopus 로고
    • note
    • In other words, if the bond order in the starting material is 0.90, that in the transition state is 0.60, and that of the products is 0, the fractional progress is 0.33 in that the bond is one-third broken. If a bond is made as a result of the reaction, the fractional progress represents the progress towards forming the bond instead.
  • 66
    • 0141780937 scopus 로고    scopus 로고
    • note
    • That is, the difference in activation enthalpy between the silyl-and methyl-substituted compounds.
  • 72
    • 0141557651 scopus 로고    scopus 로고
    • note
    • Hypothetically, one could apply the formula for Y by assigning a fractional progress in the transition state and applying it to Δ(ΔH) rather than weighting the isodesmic exchange reactions. However this would violate the principle of microscopic reversibility in that different Y values would be predicted depending on which reaction direction was being considered. This is the case in general when the substituent in question is an "active participant" that changes its bonding dramatically in the reaction rather than a "spectator".
  • 73
    • 0141446093 scopus 로고    scopus 로고
    • note
    • It should be pointed out that although at least transiently stable trigonal bipyramidal anionic Si structues are known, we find no evidence for an intermediate in this reaction.
  • 76
    • 0141669033 scopus 로고    scopus 로고
    • note
    • This reaction would obviously never happen because this barrier is much higher than the C-S homolytic bond dissociation energies.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.