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Volumn 32, Issue 9, 1993, Pages 1297-1301

Isomeric Self‐Assembling [2]Catenanes

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Indexed keywords


EID: 33748221558     PISSN: 05700833     EISSN: 15213773     Source Type: Journal    
DOI: 10.1002/anie.199312971     Document Type: Article
Times cited : (47)

References (52)
  • 5
    • 0000419781 scopus 로고
    • Helicate: Vier- und fünfkernige Doppelhelix-Komplexe aus CuI und Poly(bipyridin)-Liganden
    • For a discussion about the self assembly of synthetic helicates using metal‐ion templates see
    • (1988) Angewandte Chemie , vol.100 , pp. 1121
    • Lehn, J.‐M.1    Rigault, A.2
  • 11
    • 0000290616 scopus 로고
    • The self assembly of [2]catenanes by means of a hydrogen‐bonding motif has been described recently
    • (1992) J. Am. Chem. Soc. , vol.114 , pp. 5303
    • Hunter, C.A.1
  • 21
    • 0003066333 scopus 로고
    • Supramolekulare Chemie – Moleküle, Übermoleküle und molekulare Funktionseinheiten (Nobel-Vortrag)
    • (1988) Angewandte Chemie , vol.100 , pp. 91
    • Lehn, J.‐M.1
  • 23
    • 0000409230 scopus 로고
    • Perspektiven der Supramolekularen Chemie – von der molekularen Erkennung zur molekularen Informationsverarbeitung und Selbstorganisation
    • (1990) Angewandte Chemie , vol.102 , pp. 1347
    • Lehn, J.‐M.1
  • 30
    • 84989539768 scopus 로고    scopus 로고
    • 6 were dissolved in 3‐nitrobenzyl alcohol that had previously been coated onto a stainless steel probe tip. Spectra were recorded in the positive‐ion mode at a scan speed of 30 s per decade.
  • 31
    • 84989599283 scopus 로고    scopus 로고
    • w = 0.137.
  • 32
    • 84989599284 scopus 로고    scopus 로고
    • Kα radiation (graphite monochromator). The structure was solved by direct methods and refined an isotropically. Further details of the crystal structure can be obtained from the Cambridge Crystallographic Data Centre, 12 Union Road, GB‐Cambridge CB21EZ (UK), on quoting the full journal citation.
  • 33
    • 84989511799 scopus 로고    scopus 로고
    • The equatorial plane of the cyclophane is defined as the mean plane of the four methylene carbon atoms.
  • 34
    • 84989525733 scopus 로고    scopus 로고
    • 6, there are additional weak stabilizing CH… O interactions between, for example, the α‐CH proton of the included bipyridinium unit nearest to the m‐xylyl spacer and the central oxygen atom of the BPP34C10 component (H… O = 2.52 Å, CH… O angle = 153°) and between the diametrically opposite central oxygen atom of the crown ether and one of the aromatic protons in the p‐xylyl spacer (H… O = 2.57 Å, CH… O angle = 159°).
  • 35
    • 84989525747 scopus 로고    scopus 로고
    • 6 this separation is 6.95 Å).
  • 36
    • 84989504696 scopus 로고    scopus 로고
    • Each stack contains only one of the enantiomeric forms of the [2]catenane.
  • 39
    • 84989591659 scopus 로고    scopus 로고
    • 6 are shifted significantly from those observed in the spectra of free BHEEB and free cyclophane.
  • 41
    • 84989550909 scopus 로고    scopus 로고
    • w = 0.097.
  • 42
    • 84989504659 scopus 로고    scopus 로고
    • 6. There are, for example, short H… O contacts between the central oxygen atom of the BPP34C10 component and one of the methylene protons of the tetracationic cyclophane component (H… O = 2.35 Å, CH… O angle = 157°) and between the diametrically opposite central ether oxygen atom and one of the α‐CH protons on the included bipyridinium unit (H… O = 2.58 Å, CH… O angle = 147°).
  • 45
    • 84989586087 scopus 로고    scopus 로고
    • 2), 6.31 (s, 4H, “alongside” hydroquinone ring protons), 7.87 (t, 2H, 5‐position of m‐xylyl spacer), 8.04 (s, 2 H, 2‐position of m‐xylyl spacer), 8.17 (d, 4H, 4‐ and 6‐positions of m‐xylyl spacer), 8.23 (d, 8H, β‐CH bipyridinium protons), 9.13 (d, 8H, α‐CH bipyridinium protons).
  • 46
    • 84989525717 scopus 로고    scopus 로고
    • c = 28 °C) of the “inside” hydroquinol resonances (δ = 3.17 and 5.53 at −60 °C, Δv = 944 Hz) nearest to the m‐xylyl spacer (see [23] for calculation).
  • 48
    • 84989550914 scopus 로고    scopus 로고
    • 1 H NMR spectroscopic study, but estimation of the barrier to circumrotation was not possible owing to the complexity of the spectra at low temperature.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.