2. The percent yield in youl c thermal isomenization Conclusions Give the struct

Question

2. The percent yield in youl c thermal isomenization Conclusions Give the structural formulas of X and Y. Explain, on the basis of your observations, how you reached these conclusions Post-Lab Questions I. 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 Which of the two definitions of stability in the "Principles" section did you use? 2. 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") NOTE: A reference to a book should contain the name(s) of the author(s), title, publisher, copyright date and page numberfs). Here is an example: Mass., 2001, pages 112-116. Peterson, J. G. and Hall, Y. S. "Chemistry is Fun", Scientific Press, Inc., Boston,

Explanation / Answer

1. Of the two isomers, the one which is more stable can be converted to a less stable isomer by thermal treatment.

Therefore,

here the cis isomer of 1,4-diphenyl-2-butene-1,4-dione is less stable than the trans isomer

trans-iosmer of 1,4-diphenyl-2-butene-1,4-dione can be converted to the cis isomer by heating the system.

trans goes to cis

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