Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
HETERA-p-CARBOPHANES. VI. LONG-RANGE ASYMMETRY EFFECT ON THE PROTON MAGNETIC RESONANCE SPECTRUM IN DIOXATHIA[17]PARACYCLOPHANES
Kazuhiko SakamotoMichinori Oki
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JOURNALS FREE ACCESS

1975 Volume 4 Issue 6 Pages 615-618

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Abstract

PMR spectrum of a dioxathia[17]paracyclophane derivative showed the nonequivalence of protons of methylene groups which are separated by 8 bonds from an aromatic ring constituting the center of plane asymmetry. The barrier to rotation of the aromatic ring was obtained as 11–12 kcal/mol.

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