The Structure of Thialene as Studied by Proton Magnetic Resonance in a Nematic Phase

Suryaprakash, N and Khetrapal, CL and Klein, RFX and Horak, V (1985) The Structure of Thialene as Studied by Proton Magnetic Resonance in a Nematic Phase. In: Magnetic Resonance in Chemistry, 23 (12). pp. 1045-1047.

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Abstract

H NMR studies on thialene (cyclopenta[b]thiapyran) oriented in a nematic liquid crystalline phase are reported. The indirect spin-spin and direct dipolar couplings and the chemical shifts between the protons are derived from the spectral analysis. The intra-ring proton-proton indirect couplings derived from the isotropic and nematic phase spectra are in agreement. The inter-ring proton-proton couplings, however, could only be obtained from the nematic phase spectra. The structural information extracted from the direct dipolar couplings corresponds to significant distortions in the arrangement of the protons of the six- and five-membered rings from the regular hexagonal and pentagonal arrangements, respectively; the molecular geometry of the fused five-membered ring is similar to that of the corresponding ring in azulene.

Item Type:	Journal Article
Publication:	Magnetic Resonance in Chemistry
Publisher:	Wiley Heyden Ltd.
Additional Information:	Copyright of this article belongs to John Wiley & Sons.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	11 Mar 2008
Last Modified:	19 Sep 2010 04:43
URI:	http://eprints.iisc.ac.in/id/eprint/13389

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