Our experiment was as followed as in our text “Microscale Organic Laboratory” by Mayo from pages 275-283. The following modifications were made:…
The purpose of this experiment was to synthesize tetraphenylcyclopentadienone using a reaction of dibenzyl ketone (1,3-diphenyl-2-propanone) with benzil in the presence of base. The reaction then proceeded with an aldol condensation reaction.5 This product was obtained using extraction (reflux), recrystallization and vacuum filtration to separate the product from the waste.…
The experiment began with 1.603g of 4-methycyclohexanol and resulted in a yield of 0.920g of product. Since the theoretical yield is 1.35g this leads to a percent yield by mass of 68.1% (see calculations). The boiling point of the product obtained was found to be 104.4°C which is higher than the expected 101-102°C (see table 1); this could also be due to the side reaction product whose boiling point is 108-112 °C (see table 1) causing the boiling point found experimentally to be a combination of the two products. The side reaction, however, should not affect the percent yield since both products have the same…
To begin, the first step of the experiment was to crack down dicyclopentadiene into the form of cyclopentadiene, which was done using the process of fractional distillation. Five milliliters of dicyclopentadiene was utilized in the distillation at the temperature of 40˚C for approximately 20 minutes. Next 0.20g of maleic anhydride was dissolve in 2mL of ethyl acetate. Then it was…
To synthesize 1,2,3,4-tetraphenylnaphthalene through a two-step synthesis. The aldol condensation reaction between benzil and dibenzyl ketone forms 2,3,4,5-tetraphenylcyclopentadienone, which then reacts with a benzene formed by anthranilic acid and isoamyl nitrate in order to yield 1,2,3,4-tetraphenylnaphthalene.…
This course will include the major topics of cell biology and microbiology that are foundational for an…
The purpose of this lab was to synthesize triphenylmethanol from benzophenone and bromobenzene by the formation of a Grignard compound with the reagents bromobenzene and magnesium metal. The bromobenzene was first transformed into the Grignard compound and was then reacted with the benzophenone to make the final product. The mixture was then mixed with sulfuric acid and the organic layer was extracted via a separatory funnel. The mixture was then recrystallized from methanol and was allowed to dry and the percent yield, melting point, and the IR was obtained. The mass of the product obtained was 5.45 grams and the percentage yield was determined to be 41.95%. The melting point range obtained from the final product was 89-91°C which was much lower than the literature value of 160-163°C. The peaks from the IR showed the formation of an alcohol group at 3460 wavenumbers and the presence of aromatic rings at 1600 and 1490 wavenumbers which confirms the successful formation of triphenylmethanol.…
When you combine Diet Coke and Mentos, you get an explosive result. The Diet Coke shoots out of the bottle like a miniature sticky geyser. This reaction is so powerful that it could actually propel a rocket, but what is the science behind this geyser-creating reaction? (Hiskey)…
Medicines are attained from plants. Although its supply is limited due to weather changes, seasons and other aspects such as contamination hence, chemists were producing ways to the synthesis of this active ingredient by…
The purpose of this experiment was to prepare benzil by first converting benzaldehyde to benzoin by the benzoin condensation, then oxidizing benzoin to benzil. The benzoin condensation was carried out using thiamine hydrochloride, or vitamin B1, as a catalyst.…
Step 2. Put the Two litre bottle of Diet Coke on the ground in an outdoor environment and take off the cap when it is steady.…
Most people might believe that putting mentos in diet coke is a chemical change, but it is actually a physical change. This is because the pieces that caused the reaction are still there, but they have just been rearranged. This also means that changing some of the factors in this experiment might cause another physical reaction to occur on a smaller or even larger scale.(Science Buddies)…
We also constructed a tube to fit over the mouth of the bottle and a delivery mechanism for the solid materials to maintain consistency in our results. • We measured the mass of the bottle using a double pan balance before and after the reaction to determine the mass lost in the reaction. We measured the horizontal distance traveled by the soda’s spray using marker flags and video. Also using video, we acquired time duration of reaction.…
In this laboratory experiment a synthesis was performed through several separate steps. The purpose of the experiment was to synthesize tetraphenylcyclopentadienone from benzaldehyde and to run reactions on carbonyl containing compounds. There was a total of three steps that led up to the synthesis of the final product, tetraphenylcyclopentadienone. The first step of the experiment was the condensation of benzaldehyde to yield benzoin. Thiamine catalyst along with water and ethanol were added to the benzaldehyde, then NaOH was added until the solution turned yellow. After recrystallization, the product was benzoin. Step two was the oxidation of benzoin to benzil. Nitric acid was added to the benzoin and heated, this was followed by recrystallization to yield the benzil. In step three the benzil from step two was to be synthesized tetraphenylcyclopentadienone. The benzil and 1,3-diphenylacetone were mixed with ethanol. After heating this, ethanoic KOH was added and the solution was left to reflux. The crystals were washed and collected. This ended the multistep synthesis. The final product was not successfully synthesized due to sources of error during procedures. Therefore, a percent yield was unable to be found. The theoretical melting point for tetraphenylcyclopentadienone 218-220 degrees Celsius.…
In the dehydration of cyclohexanol, Montmorillonite K10 clay was used as an acid catalyst, which promoted dehydration. Cyclohexanol was refluxed in the presence of the catalyst. During distillation the cyclohexene product distilled from the reaction mixture along with water, and was dried with MgSO4.…