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Volumn 122, Issue 29, 2000, Pages 6917-6928

Structural, vibrational, and electronic characteristics of enyne macrocycles as a function of ring strain

Author keywords

[No Author keywords available]

Indexed keywords

MACROCYCLIC COMPOUND;

EID: 0034718066     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja000617g     Document Type: Article
Times cited : (65)

References (88)
  • 6
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    • Carbon Rich Compounds II.
    • Carbon Rich Compounds II. Top. Curr. Chem. 1999, 201 (special issue).
    • (1999) Top. Curr. Chem. , vol.201 , Issue.SPEC. ISSUE
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    • Sondheimer, F. Ace. Chem. Res. 1972, 5, 81-91.
    • (1972) Chem. Res. , vol.5 , pp. 81-91
    • Ace, S.F.1
  • 61
    • 0003833714 scopus 로고
    • Bloor, D., Chance, R. R., Eds.; Martinus Nijhoff: Dordrecht
    • Polydiacetylenes; Bloor, D., Chance, R. R., Eds.; Martinus Nijhoff: Dordrecht, 1985.
    • (1985) Polydiacetylenes
  • 64
    • 0033591239 scopus 로고    scopus 로고
    • For a preliminary communication of 8c-e, see: Tykwinski, R. R. Chem. Commun. 1999, 905-906.
    • (1999) Chem. Commun. , pp. 905-906
    • Tykwinski, R.R.1
  • 69
    • 0001197278 scopus 로고
    • Powder samples of 8d show darkening at ca. 115 °C, and a reproducible melting point at ca. 155 °C. Continued heating gives rapid decomposition to a black solid at 165 °C. Differential scanning calorimetery of microcrystalline 8d showed a distinct melting point at 160 °C, followed almost immediately by decomposition or polymerization. These observations suggested a topochemical reaction/polymerization involving the diacetylene moiety to a polydiacetylene (PDA) product. Analysis of the crystal packing of 8d, however, shows the closest distance between atoms of the diacetylene groups to be greater than 7 A, rendering PDA formation via a 1, 4-addition pattern unlikely (see: Enkelmann, V. Adv. Polym. Sci. 1984, 63, 91-136). Analysis of the orange-colored material from the above experiments by 'H NMR and MS shows predominantly the macrocycle 8d. To date, the source of the discoloration remains unresolved, and investigations of the thermochemistry of 8d are currently ongoing.
    • (1984) Adv. Polym. Sci. , vol.63 , pp. 91-136
    • Enkelmann, V.1
  • 70
    • 33847544302 scopus 로고    scopus 로고
    • The numbering scheme shown for structure 8c in Figure 1 has been changed from that used in ref 43 to facilitate comparisons to the other structures.
    • The numbering scheme shown for structure 8c in Figure 1 has been changed from that used in ref 43 to facilitate comparisons to the other structures.
  • 72
    • 33847559284 scopus 로고    scopus 로고
    • 13C NMR shifts of C(4)/C(12) for 8c-e were incorrectly reported in ref 43
    • 13C NMR shifts of C(4)/C(12) for 8c-e were incorrectly reported in ref 43.
  • 76
    • 33847534463 scopus 로고    scopus 로고
    • 13C NMR chemical shift data with bond angle a about acetylenic carbons C(2)/C(17), C(3)/ C(16), C(8)/C(11), and C(9)/C(IO)
    • 13C NMR chemical shift data with bond angle a about acetylenic carbons C(2)/C(17), C(3)/ C(16), C(8)/C(11), and C(9)/C(IO).
  • 83
    • 33847558882 scopus 로고    scopus 로고
    • 1H NMR analysis
    • 1H NMR analysis.
  • 84
    • 33847570413 scopus 로고    scopus 로고
    • 13C NMR chemical shift data for carbons C(4)/C(12) and C(5)/C(13), and b olefinic Raman frequencies with bond angle a C(3)-C(4)-C(8)/C(11)-C(12)-C(16)
    • 13C NMR chemical shift data for carbons C(4)/C(12) and C(5)/C(13), and b) olefinic Raman frequencies with bond angle a C(3)-C(4)-C(8)/C(11)-C(12)-C(16).
  • 85
    • 33847548164 scopus 로고    scopus 로고
    • See Supporting Information for correlations of acetylenic Raman frequencies with bond angle a about carbons C(8)/C(11) and C(9)/C(10)
    • See Supporting Information for correlations of acetylenic Raman frequencies with bond angle a about carbons C(8)/C(11) and C(9)/C(10).


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