Studies on the Nuclear Magnetic Resonance Spectra of (E)-1-Aryl-3-(2- and 3-thienyl)-2-propenones and Unique Observation of 4J and 5J Coupling in Their 1H-1H COSY 


Vol. 32,  No. 2, pp. 687-692, Feb.  2011
10.5012/bkcs.2011.32.2.687


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  Abstract

1H and 13C NMR spectra of series of (E)-1-aryl-(2- and 3-thienyl)-2-propenones, that are aldol condensation products between 2- and 3-thiophenecarbaldehydes and m- and p-substituted acetophenones, were examined to make complete assignments of the chemical shifts. Long range couplings, 4J and 5J, are observed in the 1H-1H COSY of both 2- and 3-thienyl compounds, which makes the elucidation of the conformation in solution possible. In contrast, the 2-furyl analogue shows the long range coupling phenomena, but the 3-furyl and phenyl analogues do not show similar phenomena.

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  Cite this article

[IEEE Style]

I. S. H. Lee, H. J. Jeon, C. K. Lee, "Studies on the Nuclear Magnetic Resonance Spectra of (E)-1-Aryl-3-(2- and 3-thienyl)-2-propenones and Unique Observation of 4J and 5J Coupling in Their 1H-1H COSY," Bulletin of the Korean Chemical Society, vol. 32, no. 2, pp. 687-692, 2011. DOI: 10.5012/bkcs.2011.32.2.687.

[ACM Style]

In Sook Han Lee, Hyun Ju Jeon, and Chang Kiu Lee. 2011. Studies on the Nuclear Magnetic Resonance Spectra of (E)-1-Aryl-3-(2- and 3-thienyl)-2-propenones and Unique Observation of 4J and 5J Coupling in Their 1H-1H COSY. Bulletin of the Korean Chemical Society, 32, 2, (2011), 687-692. DOI: 10.5012/bkcs.2011.32.2.687.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949