Lab 6 Fatty Acid Michael Thrall

Lab 6 Fatty Acid Michael Thrall - Hydrogenation of a Fatty...

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Hydrogenation of a Fatty Acid Michael Thrall Teaching Assistant: Rahul Purohit Date Experiment Performed: 10-8-08 Date Report Submitted: 10-15-08 Abstract: The beginning amount of methyl oleate used was .507g. The final amount of product in the form of methyl stearate was .261g. The percent yield of methyl stearate was calculated to be 73 percent. The IR spectra comparison between the methyl stearate and the methyl oleate found a peak on the methyl oleate spectra at 1644 cm -1 that was not evident on the methyl stearate. The 1644 cm -1 peak denotes a carbon-carbon double bond, thus it is not evident on the methyl stearate. The melting point of the experimental methyl stearate was determined to be 36°C as compared to the melting point of a standard methyl stearate of 37°C.
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Results: Weight of Crystals - .261g Melting Point of Crystals - 36°C Percent Yield Recovered Methyl Stearate – 73% Discussion: This experiment required the hydrogenation of a fatty acid, which was in this case methyl oleate. Methyl oleate is a un-saturated fatty acid. Which regards to chemistry, if an alkyl chain has no double or triple bonds, it is considered saturated, meaning that each carbon has the maximum number of allowed hydrogen atoms. Oppositely, if an alkyl chain has a double or triple bond it is considered un-saturated, meaning that each carbon does not have the maximum amount of attached hydrogen atoms because there is a double or triple bond that reduces the ability of the carbon to bond with the maximum number of hydrogen atoms. The process of hydrogenation takes an un-saturated alkyl chain and reduces the double bonds in the chain by forcing the pi bonds within the chain
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Lab 6 Fatty Acid Michael Thrall - Hydrogenation of a Fatty...

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