Summarize this spectrum ,Using proton NMR, how could you experimentally determine that you have the trans isomer rather than cis isomer (Consider the use of coupling constants for the vinyl hydrogen) 'H spectrum trans 3 nitrochalcone CHALCONE 1H LAB 11 2 CDC13 7 11 2016 5 8 45 8 35 8 25 8 15 8 04 8 02 8 05 f1 (ppm) 1 450 7 95 7 85 7 75 7 65 7 55 9E 06 F 8E 06 7E 06 6E 06 SE 06 4E 06 3E 06 2E 06 1E 06 0 1E 06

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Question: Summarize this spectrum ,Using proton NMR, how could you experimentally determine that you have the trans isomer rather than cis isomer? (Consider the use of

Summarize this spectrum ,Using proton NMR, how could you experimentally determine that you have the trans isomer rather than cis isomer? (Consider the use of coupling constants for the vinyl hydrogen)

'H spectrum trans-3-nitrochalcone CHALCONE 1H/LAB 11-2/ CDC13 / 7-11-2016 5 8.45 8.35 8.25 8.15 8.04 8.02 8.05 f1 (ppm). 1-450- 7.95 7.85 7.75 7.65 7.55 -9E+06 F-8E+06 -7E+06 -6E+06 -SE+06 4E+06 -3E+06 -2E+06 -1E+06 -0 1E+06

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