The Nottingham Pulse Rig Towards Determining The Mechanism Of The Fischer Tropsch Reaction

Characterization of activated carbon is done by by using SEM (Scanning Electron Microscope) and FTIR (Fourier Infrared Spectroscopy)

Introduction – A double replacement reaction is a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound. If you have the reactants of two reaction solution that you can determine the products. All you need to do is pair the positive parts of the compounds with the other compounds negative part. Once you find the products you can determine their phase of matter by using Table H. You can also use Table F to determine the solubility guidelines for aqueous solutions. If the product falls under soluble or exceptions to insoluble it is in the aqueous stare. If the product falls under

We can trap the oxygen gas created into a container thus showing the extent of the reaction and this will show the rate in which oxygen is created and how the rate will change when we use different initial concentrations. We do use a catalyst in this reaction to

In this experiment, the Fischer Esterification of an unknown acid and an unknown alcohol was used to prepare an unknown ester. Sulfuric acid was used as a catalyst in the reaction which then was put under reflux. After cooling, the pH of the solution was raised to approximately 8 using sodium carbonate. Diethyl ether was added, then the aqueous layer was removed and the organic layer was washed with sodium chloride. The aqueous layer was removed again and sodium sulfate was added. The unknown product was then identified using gas chromatography (GC) to obtain the retention time.

Determining how a mechanism comes to be is crucial as a scientist and arriving to conclusions is a crucial component which lead to examining and determining which mechanism takes place when two or more substrates are made to react. At the end of the experiment a mechanism was determined based on the purified product’s melting point. This was accomplished by having the reaction take place but also through acquiring the melting point and comparing the number to the melting point which was already established by the scientific community. (Q1) When 0.252 g of trans-cinnamic acid was mixed in 2.5 mL glacial acetic acid and 0.434g pyridinium tribromide was added, the resulting product reflects an addition reaction. In general, reactions take place to achieve its lowest Gibb’s free energy because it’s at

The purity and identity of the product can be determined through the use of smell, IR spectroscopy and melting point determination. A general idea of what the ester is can be obtained by smell. Esters can have specific smells and if the scent can be determined, one may have an idea of the ester was created. IR spectroscopy will identify the bonds of the functional groups. The ester can be considered pure if there are no additional peaks on the IR spectrum. For example, if a peak corresponding to an alcohol group appeared on the IR spectrum it would mean the ester is not completely pure. Melting point can also be used to confirm the identity and how pure the final product is. Comparison of the experimental melting point and the literature value allows for determination of how close the experimental value is to the literature value. If the experimental value is within the range of the literature value, the product can be considered pure.

The purpose of this lab was to synthesize the ester isopentyl acetate via an acid catalyzed esterification (Fischer Esterification) of acetic acid with isopentyl alcohol. Emil Fischer and Arthur Speier were the pioneers of this reaction referred to as Fischer Esterification. The reaction is characterized by the combining of an alcohol and an acid (with an acid catalyst) to yield and ester plus water. In order to accomplish the reaction, the reactants were

In this experiment, a Fischer Esterification reaction was performed with two unknown compounds. The unknown compounds, Acid 2 and Alcohol D, were identified by using the knowledge of the reaction that took place, and the identity of the product that was synthesized. The identification of the product resulted from analysis of IR and NMR spectra.

However, the proton that left replenishes that acid catalyst to help repeat the mechanism for other molecules. The general mechanism of Nucleophilic Acyl Substitution could be simplified and shown by Figure 3 and the specific mechanism of the Fischer Esterification reaction that ensues in the experiment is portrayed by figure 4. (John McMurry, 2007)

Mechanism: Key features of the Fischer Esterification mechanism are: a. protonation of the carbonyl group, b. the

The products obtained were in agreement with the Chauvin mechanism, thus proving its legitimacy [1].

Then, a shift is observed by one of the atoms to the carbocation. And finally, to stabilize the molecule, catalyst is then regenerated to yield the final product.

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