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13C-NMR spectroscopy: Isotope shifts and couplings in mono- and dideuteriated polycyclic aromatic hydrocarbons-XIX

par Martin, Ricardo;Moriau, Jacques ;Defay, Nicole
Référence Tetrahedron, 30, 1, page (179-185)
Publication Publié, 1974

Article révisé par les pairs

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Résumé :

The deuterium isotope upfield shifts and couplings (J13Cα-D and J13Cγ-C-C-D) observed in the 13C-NMR spectra (22·63 MHz) of naphthalene-1-d, naphthalene-2-d, phenanthrene-9-d, benzo[c]phenanthrene-2-d, hexahelicene-7-d and anthracene-9,10-d2 can be used to assign some of the following 13C-signals: 13Cα-D, 13Cβ-C-D ortho, 13Cγ-C-C-D meta (3Jt) and 13Cγ-C-C-D peri (3Jt). These isotope effects are particularly useful for the assignment of the signals of the carbon atoms common to two rings (quaternary carbon atoms, CQ). The study of anthracene-9, 10-d2 has yielded results which are at variance with published assignments2 concerning anthracene itself. © 1974.