Structure of dibenzofuran and dibenzothiophene: Proton NMR study in nematic phases

Arumugam, S and Kunwar, AC and Khetrapal, CL (1984) Structure of dibenzofuran and dibenzothiophene: Proton NMR study in nematic phases. In: Organic Magnetic Resonance, 22 (9). pp. 547-549.

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Abstract

Proton NMR spectra of dibenzofuran and dibenzothiophene were investigated in the nematic phase of liquid crystals. Dipolar couplings obtained from the spectral analysis were used to derive the inter-proton distance ratios. Deviations from planarity were observed in both molecules, and an attempt was made to determine the extent of non-planarity. Differences in the relative inter-proton distances in the two molecules are explained in terms of the bond polarization hypothesis and the van der Waals and the covalent radii of the oxygen and sulphur heteroatoms.

Item Type:	Journal Article
Publication:	Organic Magnetic Resonance
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Keywords:	dibenzofuran;proton nmr;dibenzothiophene;spectral analysis;bond polarization hypothesis
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	18 Aug 2005
Last Modified:	08 Feb 2012 05:14
URI:	http://eprints.iisc.ac.in/id/eprint/3523

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