Estimation of magnetic anisotropy in polycyclic aromatics

  • Iwamoto H
  • Kawatani T
  • Fukazawa Y
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Dihydro-dibenzophenanthrene derivatives 1a (1b) were synthesised in order to obtain the NMR shielding parameters for naphthalene ring. The1H NMR assignment of 1a and substituent-induced shifts (SIS) from the corresponding androstanone ethylene ketal (2) are presented. A simple sum of the magnetic shielding of benzene rings can satisfactorily reproduced the observed SIS values due to the naphthalene ring of 1. © 2001 Elsevier Science Ltd.

Author-supplied keywords

  • Magnetic anisotropy
  • Polycyclic conjugate system
  • Substituent-induced shift

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  • Hajime Iwamoto

  • Takefumi Kawatani

  • Yoshimasa Fukazawa

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