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Volumn 128, Issue 23, 2006, Pages 7594-7607

Dynamic effects on the periselectivity, rate, isotope effects, and mechanism of cycloadditions of ketenes with cyclopentadiene

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON ENERGY LEVELS; ELECTRON TRANSITIONS; ENERGY TRANSFER; ISOTOPES; ORGANIC COMPOUNDS; REACTION KINETICS;

EID: 33745055198     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0606024     Document Type: Article
Times cited : (174)

References (143)
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    • note
    • It should be noted that the variational transition state theory procedure in ref 25 is not applicable to an unsymmetrical surface.
  • 65
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    • (c) Staudinger had in fact observed these reactions prior to the discovery of the Diels-Alder reaction: Staudinger, H. Liebigs Ann. Chem. 1907, 40, 51-123.
    • (1907) Liebigs Ann. Chem. , vol.40 , pp. 51-123
    • Staudinger, H.1
  • 69
    • 33745040120 scopus 로고    scopus 로고
    • note
    • The word "standard" is used in this paper to refer to theoretical or mechanistic analyses of reactions in which the selectivity is determined by transition state barriers, and the reaction path is decided by the MEP connection of stationary points. The "standard" analysis ignores dynamic trajectories, except to the degree that they are implicitly assumed to approximately follow the MEP. The "standard" analysis is not limited to conventional TST.
  • 70
    • 0000448885 scopus 로고
    • Initial reports on the observation and stability of dichloroketene in solution (Brady, W. T.; Liddell, H. G.; Vaughn, L. L. J. Org. Chem. 1966, 31, 626-628)
    • (1966) J. Org. Chem. , vol.31 , pp. 626-628
    • Brady, W.T.1    Liddell, H.G.2    Vaughn, L.L.3
  • 88
    • 33745010546 scopus 로고    scopus 로고
    • note
    • The results could also in principle be consistent with an asynchronous cycloaddition involving leading bond formation at C4, but this is not supported by either theoretical calculations or qualitative expectations from frontier orbital theory.
  • 93
    • 15744375697 scopus 로고    scopus 로고
    • Frisch, M. J. et al. Gaussian, Inc., Wallingford CT
    • See the Supporting Information for full details on the calculational methods employed. Most standard calculations employed Gaussian 03, revision C.02: Frisch, M. J. et al. Gaussian, Inc., Wallingford CT, 2004.
    • (2004) Gaussian 03, Revision C.02
  • 94
    • 33745034859 scopus 로고    scopus 로고
    • note
    • The energies given here are not ZPE-corrected, for relevance to trajectories on the potential-energy surface. See the Supporting Information for a complete table of energies.
  • 95
    • 28044451321 scopus 로고    scopus 로고
    • A recent paper found that DFT calculations performed relatively poorly in predicting the overall energetics of [2 + 2] cycloadditions, but mPW1K showed the best performance versus G3MP2 results for the methods tested. See: Check, C. E.; Gilbert, T. M. J. Org. Chem. 2005, 70, 9828-9834. MP2 single-point calculations show identical trends; at MP2/6-311 +G**//B3LYP/6- 311+G**, formation of 7 is exothermic by 46.5 kcal/mol and favored by 18.2 kcal/mol over formation of 8, while formation of 4 is exothermic by only 29.0 kcal/mol and favored over 3 by only 11.3 kcal/mol.
    • (2005) J. Org. Chem. , vol.70 , pp. 9828-9834
    • Check, C.E.1    Gilbert, T.M.2
  • 96
    • 33745011486 scopus 로고    scopus 로고
    • note
    • Unlike 13, 19's restricted wave function is not completely stable, but the energy is lowered by only 0.02 kcal/mol at UB3LYP/6-311+G**, with = 0.0004.
  • 124
    • 0001694298 scopus 로고
    • 13C KIEs, the differences in atomic motion at opposite ends of a cycloaddition are supported experimentally by KIE observations. See ref 53a and (a) Birney, D. M.; Houk, K. N. J. Am. Chem. Soc. 1990, 112, 4127-4133.
    • (1990) J. Am. Chem. Soc. , vol.112 , pp. 4127-4133
    • Birney, D.M.1    Houk, K.N.2
  • 141
    • 13644262206 scopus 로고    scopus 로고
    • As a related example, it was recently proposed that the thermal dimerization of styrene involves some concerted trajectories despite a stepwise transition state, albeit without the support of trajectory studies. See: Khuong, K. S.; Jones, W. H.; Pryor, W. A.; Houk, K. N. J. Am. Chem. Soc. 2005, 127, 1265-1277.
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 1265-1277
    • Khuong, K.S.1    Jones, W.H.2    Pryor, W.A.3    Houk, K.N.4


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.