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1 H and 13 C NMR spectra of multibridged [2 n ]cyclophanes
Author(s) -
Ernst Ludger,
Boekelheide Virgil,
Hopf Henning
Publication year - 1993
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260310713
Subject(s) - chemistry , cyclophane , nmr spectra database , spectral line , nuclear magnetic resonance spectroscopy , coupling constant , crystallography , stereochemistry , chemical shift , crystal structure , physics , particle physics , astronomy
The 1 H and 13 C NMR spectra of all [2 n ] cyclophanes with the same substitution pattern in both benzene rings and of the skew [2.2.2](1,2,4)(1,2,5)cyclophane were assigned by one‐dimensional NOE difference and two‐dimensional correlation spectroscopy. The 1 H NMR spectra of the bridge protons including the 13 C satellites of the symmetrical compounds [2.2]paracyclophane, [2.2.2](1,3,5)cyclophane and superphane were analysed by iterative methods. Chemical shifts and H,H coupling constants are discussed with regard to molecular geometries.