메뉴 건너뛰기




Volumn 7, Issue 2, 2006, Pages 475-481

Computational studies on the cyclization of polycyclic aromatic hydrocarbons in the synthesis of curved aromatic derivatives

Author keywords

Density functional calculations; Fullerenes; Fused ring systems; Radical ions; Reaction mechanisms

Indexed keywords

ACTIVATION ENERGY; AROMATIZATION; DENSITY FUNCTIONAL THEORY; FULLERENES; MINERAL OILS; POLYCYCLIC AROMATIC HYDROCARBONS; POSITIVE IONS;

EID: 32944460933     PISSN: 14394235     EISSN: 14397641     Source Type: Journal    
DOI: 10.1002/cphc.200500345     Document Type: Article
Times cited : (5)

References (64)
  • 1
    • 32944467630 scopus 로고    scopus 로고
    • Frontier Carbon Corp. (Mitsubishi Chemical Corp.) produces fullerenes in ton amounts: Chem. Eng. News 2003, 13-14.
    • (2003) Chem. Eng. News , pp. 13-14
  • 7
    • 0032543190 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 1998, 37, 1226-1229.
    • (1998) Angew. Chem. Int. Ed. , vol.37 , pp. 1226-1229
  • 15
    • 0029978631 scopus 로고    scopus 로고
    • e) 7,10-bis(1-trimethylsilyloxyethenyl)fluoranthene has also been used: C. Z. Liu, P. W. Rabideau, Tetrahedron Lett. 1996, 37, 3437-3440;
    • (1996) Tetrahedron Lett. , vol.37 , pp. 3437-3440
    • Liu, C.Z.1    Rabideau, P.W.2
  • 33
    • 13444273057 scopus 로고    scopus 로고
    • Fullerene hydrogenation has been calculated to lower the barriers for the Stone-Wales process: c) J. Y. Yi, J. Bernholc, Chem. Phys. Lett. 2005, 403, 359-362.
    • (2005) Chem. Phys. Lett. , vol.403 , pp. 359-362
    • Yi, J.Y.1    Bernholc, J.2
  • 55
    • 32944472959 scopus 로고    scopus 로고
    • 1): anthracene, 170.7; decacyclene, 168.3; pyrene, 171.3. From the Web-Book of the National Institute of Standards and Technology, http://webbook.nist.gov/chemistry.
  • 56
    • 32944480665 scopus 로고    scopus 로고
    • note
    • Results for the cyclizatlon to five- or six-membered rings of the radicals formed upon deprotonation, which could be important intermediates when generated by other means, can be found in the Supporting Information.
  • 57
    • 32944469558 scopus 로고    scopus 로고
    • note
    • 13 9.
  • 60
    • 32944469855 scopus 로고    scopus 로고
    • note
    • + and a relatively high natural atomic charge (+0.23) compared with those of all other C atoms (which show negative charges up to -0.38).
  • 61
    • 32944458199 scopus 로고    scopus 로고
    • note
    • .+ indicates that the positive charge is higher in the dehydrogenated carbon atoms (+0.24; the others are practically neutral or negatively charged up to -0.31). The natural electron configuration shows 3.74 valence electrons for each of these carbon atoms (instead of roughly four electrons for the others). The relatively localized radical character explains the fast formation of the new C-C bond from this intermediate.
  • 62
    • 32944463543 scopus 로고    scopus 로고
    • note
    • .+, we have just considered one of the possibilities for each intermediate, since the energies involved in the eliminations must be similar.
  • 63
    • 32944461646 scopus 로고    scopus 로고
    • note
    • 1 in both cases, and the H-H distances are 2.16 and 2.22 Å, respectively.
  • 64
    • 32944470573 scopus 로고    scopus 로고
    • note
    • ., and the hybridization is again close to sp by NBO analysis. The natural charge is even higher (+0.35).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.