Isolation and Reactions of Cholesterol

Carleton University| Isolation and Reactions of Cholesterol| S10-CHEM 2203 Formal science lab wrap up| Emily Giroux: 100-688-773| Lab partner: Sarah Heinzle| TA: Jamie Davey| 5/26/2010| 4-cholesten-3-one (C27H45O) was synthesized from its cholesterin (C27H45OH) herald by sequentially brominating, oxidizing, debrominating, and isomerizing the intricate to produce cholesterol dibromide, dibromocholestanone, 5-cholesten-3-one and 4-cholesten-3-one. Recrystallization and FT-IR spectrum psychoanalysis were the main techniques used to purify and confirm individuality and probity of the deepens, respectively. Functional group characterization by FT-IR spectra analysis of the 5-cholesten-3-one and 4-cholesten-3-one specimens resembled the literature spectra of the pure aggregates. The 5 cholesten-3-one and 4-cholesten-3-one sample spectra produced absorbance peaks from 3000-2800cm-1 diagnostic of their snow systema skeletale and hydrocarbon tail. The 5-cholest en-3-one sample spectra also possessed mainpeaks at 1718cm-1 and 1468cm-1, indicative of the compounds un fuse ketone and alkene bond, respectively. The 4-cholesten-3-one sample spectra produced absorbance peaks at 1677cm-1 and 1466cm-1, characteristic of the compounds conjugated ketone and alkene bond, respectively.

The minor forepart of the hydroxyl functional group was noted in the 5-cholesten-3-one sample spectra, and of conjugated and unconjugated ketone groups in the 5-cholesten-3-one and 4-cholesten-3-one sample spectra, respectively. The recovery of 5-cholesten-3-one from cholesterol was 18.9%. This picture was significantly affe cted by the loss of product receivable to a! spill during the debromination process. The recovery of 4-cholesten-3-one from 5-cholesten-3-one was 82.7%. The FT-IR spectra obtained for the sample compounds confirmed that the reactions employed passim the synthesis of 4-cholesten-3-one were successful. | Introduction The purpose of this...If you want to take a shit a dependable essay, order it on our website: BestEssayCheap.com

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