Post-Lab Questions According to YOUR EXPERIMENTAL OBSERVATIONS, which isomer of
ID: 1027765 • Letter: P
Question
Post-Lab Questions According to YOUR EXPERIMENTAL OBSERVATIONS, which isomer of 1,4-diphenyl-2-butene-1,4-dione is more stable? Explain how you arrived at your answer Is your answer consistent with the findings of other chemists on the relative stabilities of cis and trans alkene isomers? Give the reference you used to obtain the needed information. HINT: Check the index of your text under "Alkenes".) OTE: A reference to a book should contain the name(s) of the author(s), title, ublisher, co Peterson, J. G. and Hall, Y. S. "Chemistry is Fun", Scientific Press, Inc., Boston, Mass., 2001, pages 112-116. What experimental observations DID YOU MAKE which support the theory that there is restricted rotation around double bonds?Explanation / Answer
Cis and trans-1-4-diphenyl-2-butene-1-4-dione are stereoisomers. What is the speci²c relationshipbetween the two of them?They are diastereomers.Explain how this photochemical isomerization allows the produc±on of the thermodynamically lessstable cis isomer. In other words, why is the trans isomer exclusively converted to the cis isomerduring short reacton periods and not vice versa Is it possible, under these conditons that the transand cis isomers are in the equilibrium with one another the trans molecule can be converted into cis because it absorbs visible light which breaks the pibond and allows rotaTon forming the cis conformaTon. the cis molecule cannot be convertedback into the trans conformaTon because it only absorbs shorter wavelengths (UV light) so it staysin the cis conformaTon. Under these condiTons it is not possible for the trans and cis isomers tobe in equilibrium with one another because the reaction only drives forward (trans to cis) and notin the reverse (cis to trans).hence trans-1-4-diphenyl-2-butene-1-4-dione is more stable .