I referred countless books and also searched about the internet yet I didn"t find a suitable explanation.
Could someone please explain this come me?
You are watching: Which is more stable cis or trans
$egingroup$ just as prefer Charges repell every other and also the unlike charges attract each other......Keep this ascendancy in mind and also think that cis isomers are Same and also Near come each other So the they repell every other and the trans isomers are much away from every other and also Opposite so no to repell and also remaiNs Stable....... $endgroup$
Contrary to the generally accepted belief, numerous cis isomers that olefinic compound are more stable 보다 their infectious diseases worldwide isomers. The steady cis kind of substituted olefins such is 1–fluoro–1, 3–butadiene and l,4–difluoro–1,3–butadiene as being because of intramolecular van der Waals forces in between the substituents < Angew. Chem. , 75 , 793 (1963) >. These forces are strong enough to hold the molecules in a cis–preferred configuration despite steric hindrance effects; these effects have been the basis for assuming the the trans form of together molecules is the an ext stable. Yet when the substituent atoms room so bulky that they get over the intramolecular van der Waals forces, climate the trans kind becomes the more favored structure.
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As much as ns am aware, and also from a fast browse though part textbooks, the trans isomer is generally much more stable than the cis isomer. This is due to the reduced steric hindrance that the substituents in the trans construction versus the cis configuration.For instance trans-but-2-ene is much more stable the cis-but-2-ene due to the fact that there is less steric interference in between the two methyl groups either side of the twin bond. However, there space exceptions come this rule which i couldn"t uncover a fast explanation for. The rule uses to both cyclic and also acyclic compounds although there are some obvious cyclic exceptions such as cyclic alkenes, wherein the cis isomer is more stable, especially for smaller sized rings, due to the huge ring strain led to by the orientation of the infectious diseases world fashion isomer. This page has actually a great illustration that this: