scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 859
Time as a Determinate of Final Product in a Dehydration Reaction Robert Simack Department of Chemistry and Biochemistry University of Alaska Fairbanks Fairbanks Alaska Abstract This study involved acid dehydration of 2-methylcyclohexanol The results varied depending on the time elapsed after initial reaction I attempted to prove the Evelyn Effect which stated that over a period of time the products of the aforementioned reaction will beobserved to change volume so that those products formed by a cis isomer of 2-methylcyclohexanol will form first However once all molecules in the cis isomer undergo reaction the remaining trans configured 2-methylcyclohexanols will proliferate during the latter period of the reaction I also postulated as to the possible formulation of 1-ethylcyclopentene and to the cause of such an event Introduction After researching acid-catalyzed dehydration reactions McMurray and background on the Evelyn Effect Clausen I hypothesize that the cis isomer of 2-methylcyclohexanol will react via an E1 type process forming 1-methylcyclohexene according to predictions from Zaitzevs rule Lehman This should be due to the fact that the cis isomer has 2 anti-coplanar hydrogens These two hydrogens should make the molecule more reactive The trans isomer with only one anti-coplanar hydrogen should be slower to react and will form a 3-methylcyclohexene In addition the 1-ethylcyclopentene will be formed from both the cis and trans isomers but only if the hydroxyl group is in an equatorial position In that position electrons from the ring may attack the alcohol directly from behind pushing it off the ring and forming a five-membered ring instead Results Discussion An NMR 300MHz spectra of the original reagent and the three fractions provided a huge amount of information in support of my hypothesis Both cis and trans isomers were present in the spectra for the original material as well as for the first two fractions The alcohols hydrogen showed up at approximately 379 and 31 for cis and trans respectively In the
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA