~1H and ~(13)C spectral studies of α,β-unsaturated sulfones

A. Manimekalai; K. Gnanasekaran

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~1H and ~(13)C spectral studies of α,β-unsaturated sulfones

机译：α，β-不饱和砜的〜1H和〜（13）C光谱研究

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~1H and ~(13)C NMR spectra have been recorded for 1-arylsulfonyl-2-p-nitrophenylethylenes 3 (aryl = 2-hydroxy-5-chlorophenyl) and 4 (aryl = 2-hydroxy-5-methylphenyl). The observed coupling constants of ethylenic protons indicate that 3 and 4 exist in E-configuration. The chemical shifts of ethylenic α-protons are found to be influenced by the nature of the substituents in the benzene ring attached to sulfonyl group. It is also found that C(α) carbon absorbs downfield in 3 compared to 4 and this can be explained based on different conformations of aryl ring in the compounds.

机译：对于1-芳基磺酰基-2-对-硝基苯基乙烯3（芳基= 2-羟基-5-氯苯基）和4（芳基= 2-羟基-5-甲基苯基），已经记录了〜1H和〜（13）C NMR光谱。观察到的烯属质子的偶联常数表明3和4以E-构型存在。发现烯属α-质子的化学位移受与磺酰基连接的苯环中取代基的性质影响。还发现，C（α）碳在3中吸收了低场，而在4中则吸收了低场，这可以根据化合物中芳基环的不同构象来解释。

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《Journal of the Indian Chemical Society》 |2001年第8期|共3页
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A. Manimekalai; K. Gnanasekaran;
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~1H and ~(13)C spectral studies of α,β-unsaturated sulfones

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