Lab report on E2 substitution on alkyl halides.

Alkenes by Elimination

Kyle Peterson

Chem. 243a

Matt Judd, Sec. 25

Date Per bodyed: 11/12/03

Abstract: The objective of this experiment is to successfully perform a dehydration of a 2-butanol and a dehydrohalogenation of 2-bromobutane to form the products 1-butene, trans-2-butene, and cis-2-butene. It was found that a dehydration of 2-butanol yielded 4.6% 1-butene, 67.3% trans-2-butene, and 28.1% cis-2-butene, and a dehydrohalogenation of 2-bromobutane yielded 19.1% 1-butene, 69.9% trans-2-butene, and 11.0% cis-2-butene.

Backround:

Gas Chromatography calves organic samples often in the same way as column chromatography. The alone differences be that it uses a moving gas phase and a stationary liquid phase, and that the temperature of the gas system can be controlled. In a gas chromatograph the sample is shot in with a syringe and is immediately vaporized in a heated injection chamber. It is then introduced to a moving be adrift of gas called the carrier gas which sweeps the vaporized sample into a column filled with particles filled with liquid adsorbent. This column is ordinarily filled with liquid that has a low vapor jam and high boiling and is called the stationary phase. This phase is also ordinarily coated onto a support material very equally and packed into a tubing apparatus as horizontally as possible and placed in the temperature controlled oven.



When organic solutions are passed through the tubing van der Waals forces attract the nonpolar molecules peculiarly if they have large molecular weights. Polar molecules can be attracted in many ways. Interactions include salt formation, coordination, hydrogen bonding, and even dipole-dipole. Through these interactions the molecules in the vaporized sample will separate accordingly. Finally at the end where the gases come out is a detector which generates a signal that is recorded on a strip chart recorder.

Elimination reactions are reactions that split a individual(a) reactant into...

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