In IR the stronger absorption supports the synthesis of the trans isomer rather than the cis isomer
In NMR signal between 13-16 Hz supports the synthesis of the trans isomer rather than the cis isomer
In proton NMR, with the help of the J-coupling constant, we can differentiate between the cis and trans isomers. If the J-coupling constant of the unsaturated protons appears between 13-16 Hz, it is a trans isomer. If the J-coupling constant of the unsaturated protons appears between 10-12 Hz, it is a cis isomer.
In IR, as we know that IR absorptions depend on the dipole moments. Trans isomers have low dipole moments so less absorption occurs. while Cis isomers have high dipole moment so high absorption occurs.
You can also learn about trans and cis isomers from the following question:
https://brainly.com/question/16289453
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