Sn2 Synthesis Lab Report

After adding the acetic acid and hydrobromic acid to the solution, and heating and recrystallizing the solution, the product triphenylmethyl bromide was created and had a mass of 0.103 g. The theoretical yield was calculated by determining the limiting reagent in the reaction. The triphenylmethanol was the limiting reagent in the reaction. The total amount of mass from the triphenylmethanol was converted to moles by using the molar mass of the triphenylmethanol. The amount of moles was then converted into grams to determine the theoretical yield, 0.125 g. The percent yield was then calculated by dividing the actual yield by the theoretical yield and multiplying the result by 100%. The percent yield was 82.4%.

Additionally, the Grignard may not have completely reacted with the benzophenone, which may not have hydrolyzed entirely. Unreacted bromobenzene and Grignard reagent would have resulted in the formation of a biphenyl side product. Because Grignard reagents readily reacts with protic solvents, an anhydrous environment was required. Exposure to atmospheric humidity may have decomposed the reagent, thus further limiting TPM yield. Furthermore, during the liquid-liquid extraction, the alkoxide salt may not have reacted completely with HCl, causing it to be loss in the aqueous

To better understand this law, Cu(s) was transformed with different reactions only to return back to Cu s). The initial and final mass of Cu(s) was recorded to give the percent recovery of copper product at

The last powder tested was unknown element V. Like the other powders

The following lab period the solid was weighed (0.0483 g) and percent yield was calculated (65.5%) with the limiting reagent being tetraphenylcyclopentadienone. The melting point was determined. The first melting point was 204-204.9 °C and the second melting point was 215.6-215.9°C. Finally, an infrared spectroscopy was obtained for the

Vacuum filtration was performed on the crude product, then it was recrystallized for purification. Melting point analysis was conducted on the recrystallized product to determine its identity. 3. The three possible mechanisms in this experiment were syn-addition

Recrystallization is a method used for purification and relies on varying solubulites at different temperatures. At low temperatures the solute does not dissolves the chosen solvent, but does in the boiling solvent, and this allows the supersaturation to occur. When the solution is cooled, recrystallization forms for the pure substance, and the impurities remain in the solution. This is caused because the impurities will not fit or bond with the structure of the pure crystallized substance. Then vacuum filtration is used to separate the pure component from its impurities.

A melting point of 130 to 135 degrees shows is over 200 degrees lower than the melting point of triphenylmethanol (360-380 degrees C). This could be due to a few reasons. One, the product was not pure. Any contamination, would it be DCM or the petroleum ether, could result in a lower temperature. What supports this possibility was the fact the product was unable to be 100% dried.

Firstly, because the NaHCO3 compound was not stored in a sealed container, therefore dust particles could have changed the results, and making the product impure. Also, there are uncertainties associated with the instruments used in this experiment. This, if the products were measured slightly more than should be, this could have affected the concentrations of the solutions, and therefore causing a larger

Results 8. The obtained product was 4-tert-butylbenzyl phenol ether. This leads the unknown compound # 51 to be tert-butyl phenol. 9. Theoretical yield =

Multiple experiments were conducted to test the rate at which O2 production was influenced by the availability of inorganic carbon. In all experiments, a varying concentration of (either 0.1%, 0.4%, 0.6%, 0.8%, or 1.0%) sodium bicarbonate was assigned to each lab bench, to use as the solution in which the aquatic plants were submerged. In the experiment my partner and I conducted, ~225 mL of distilled water was poured into two 250 mL Erlenmeyer flasks. These would later be used as photosynthetic systems— an experimental control to regulate temperature changes.

The percent yield was 22.33%. In most cases, that means that a lot of possible product was lost. However, in this case, that was not true. When Benzaldehyde reacted with the Wittig reagent, it produced two products: E-Stilbene and Z-Stilbene. The Z product was a liquid, while the E product was a solid.

The actual data is the result on our experiment vs theoretical, which is based on the calculations above. I have also learned to pay more attention to draining out all of the product completely before continuing to test the experiment, as any small drop of contaminant can veer our results into a different

The melting point range for the crude product was 113-115.3℃. the melting point range for the purified product was also 113-116℃. This melting point range was almost perfect to that of the theoretical melting point which is 113-115℃ proving that the product was in fact created. When looking at the percent yield of the crude acetanilide, there was an 81% yield which was a very good yield because the average percent yield is between 80-90%. The percent recovery of the acetanilide was 88% which is also very good because much of the product was recovered meaning that the product was in fact

Purpose/Introduction The process of recrystallization is an important method of purifying a solid organic substance using a hot solution as a solvent. This method will allow the separation of impurities. We will analyze Benzoic Acid as it is dissolved and recrystallized in water and in a solvent of Methanol and water. Reaction/Summary