Deepak, Vinay HS and Joy, Anu and Suryaprakash, N (2006) Determination of natural abundance $^1^5N-^1H$ and $^1^3C-^1H$ dipolar couplings of molecules in a strongly orienting media using two-dimensional inverse experiments. In: Magnetic Resonance in Chemistry, 44 (5). pp. 553-565.
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Abstract
NMR spectra of molecules oriented in liquid crystals provide homo- and heteronuclear dipolar couplings and thereby the geometry of the molecules. Several inequivalent dilute spins such as $^1^3C$ and $^1^5N$ coupled to protons form different coupled spin systems in their natural abundance and appear as satellites in the proton spectra. Identification of transitions belonging to each spin system is essential to determine heteronuclear dipolar couplings, which is a formidable task. In the present study, using $^1^5N-^1H$ and $^1^3C-^1H$ HSQC, and HMQC experiments we have selectively detected spectra of each rare spin coupled to protons. The $^{15}N-^1H$ and $^{13}C-^1H$ dipolar couplings have been determined in the natural abundance of $^{13}C$ and $^{15}N$ for the molecules pyrazine, pyrimidine and pyridazine oriented in a thermotropic liquid crystal.
Item Type: | Journal Article |
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Publication: | Magnetic Resonance in Chemistry |
Publisher: | John Wiley & Sons |
Additional Information: | Copyright of this article belongs to John Wiley & Sons. |
Keywords: | NMR spectroscopy;HSQC;HMQC;pyrazine;pyrimidine;pyridazine;dipolar couplings;natural abundance;liquid crystals;inverse experiment |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 30 Jun 2008 |
Last Modified: | 19 Sep 2010 04:28 |
URI: | http://eprints.iisc.ac.in/id/eprint/7154 |
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