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Volumn 69, Issue 10, 2004, Pages 3574-3577

Conformational Studies by Dynamic NMR. 99. Experimental and Computed Determination of Rotation Barriers in the Crystalline State: The Case of Naphthylphenylsulfoxide

Author keywords

[No Author keywords available]

Indexed keywords

CARBON; CHEMICAL BONDS; COMPUTATIONAL METHODS; COMPUTER SIMULATION; NAPHTHALENE; SINGLE CRYSTALS; SULFUR COMPOUNDS; X RAY DIFFRACTION;

EID: 2442620207     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo049843p     Document Type: Article
Times cited : (11)

References (56)
  • 2
    • 0003466377 scopus 로고
    • Jackman, L. M., Cotton, F. A., Eds, Academic Press New York
    • (a) Dynamic Nuclear Magnetic Resonance Spectroscopy; Jackman, L. M., Cotton, F. A., Eds; Academic Press: New York, 1975.
    • (1975) Dynamic Nuclear Magnetic Resonance Spectroscopy
  • 12
  • 42
    • 2442598913 scopus 로고    scopus 로고
    • note
    • The ortho and meta carbon signals of the solid-state spectrum at +63 °C (125.0 and 128.5 ppm, respectively) were assigned by analogy with the shifts (125.0 and 129.3 ppm, respectively) of the solution spectrum (see Experimental Section). Such an assignment was further supported by the observation that these two signals grow much more than those of all other carbons when a standard single pulse experiment (without cross polarization) is applied with a 16 s delay time. This is due to the faster relaxation rate that is a consequence of the rapid rotation of the phenyl ring at high temperature (all other carbon signals would require a delay at least 10 times longer to display a significant growth in this single pulse experiment).
  • 43
    • 2442510727 scopus 로고    scopus 로고
    • note
    • 13C signals, computed for the isolated molecule, is the same as that occurring in the crystal. It has to be stressed, however, that such an assignment is immaterial for the experimental determination of the rotation barrier, since the opposite assignment would obviously yield the same ΔG‡ value.
  • 48
    • 2442520002 scopus 로고    scopus 로고
    • Indiana University: Bloomington, IN
    • QCPE program 633; Indiana University: Bloomington, IN.
    • QCPE Program 633
  • 49
    • 2442613699 scopus 로고    scopus 로고
    • note
    • Within the experimental uncertainty the ΔG‡ value was found to be independent of temperature, indicating that the ΔS‡ term must be quite small.
  • 50
    • 0000925469 scopus 로고
    • 3 as solvent) in the presence of a nearly equimolecular amount of the enantiopure (R)-l-1-(9-anthryl)-2,2,2-trifluoroethanol (Pirkle, W. H. J. Am. Chem. Soc. 1966, 88, 1837).
    • (1966) J. Am. Chem. Soc. , vol.88 , pp. 1837
    • Pirkle, W.H.1
  • 55
    • 85050279198 scopus 로고
    • Karaulova, E. N.; Bardina, T. A.; Gal'pern, G. D.; Bobruiskaya, T. S Neftekhimiya 1966, 6, 480; Chem. Abstr. 1966, 65, 10452g.
    • (1966) Chem. Abstr. , vol.65


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.