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Volumn , Issue 24, 2005, Pages 5306-5312

Spin-spin interactions across the "cove" in the (Z) and (E) isomers of 1,1′-difluoro-9,9′-bifluorenylidene

Author keywords

Compliance constants; Configuration determination; Density functional calculations; NMR spectroscopy; Strained molecules; Through space F,F spin spin coupling; X ray diffraction

Indexed keywords


EID: 30044438951     PISSN: 1434193X     EISSN: None     Source Type: Journal    
DOI: 10.1002/ejoc.200500533     Document Type: Article
Times cited : (8)

References (29)
  • 1
    • 30044452003 scopus 로고    scopus 로고
    • Chemical parlance knows the "bay" region in phenanthrene, which has three sides, and the "fjord" region (four sides) in benzo[c]phenanthrene. There does not seem to exist a catchy term for the inner region in [5]helicene (five sides) or in the related compounds 1 or 9,9′-bifluorenylidene of this paper. We suggest to call it a "cove", which is "a circular or round inlet with a narrow entrance" (http://en.wikipedia.org/wiki/Cove as of March 18, 2005). This term would be most apt if the compounds in question were planar.
  • 5
    • 30044434139 scopus 로고    scopus 로고
    • note
    • [5] However, the molecules studied there were fully conjugated 1,n-difluoropolyynes and planar all-trans-1,n-difluoropolyenes in the zigzag conformation. These situations are not comparable with the situation in 1Z. Further, if a through-bond F,F coupling were operating in 1Z, this would probably also be the case for 1E.
  • 19
    • 30044442762 scopus 로고    scopus 로고
    • Bruker-Franzen Analytik, Bremen
    • WIN-DAISY, version 4.05, Bruker-Franzen Analytik, Bremen, 1999.
    • (1999) WIN-DAISY, Version 4.05
  • 29
    • 30044449842 scopus 로고    scopus 로고
    • note
    • R = 15.9min (1E) and 16.9 min (1Z)]. We are grateful to Dipl.-Chem. Madalina Stefan for carrying out the HPLC experiments.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.