Benzoic acid

cyclohexene, rather than cyclohexanol. The next step’s yield was even lower than the first, at 7.02%. The crude adipic acid had a yield of 27.4%, but was not pure, because the melting point was very low, around 112-123°C. The recrystallized adipic acid was much more pure and had a melting point at 140-149°C, which is much closer to the literature value of 152.1°C, indicating that the adipic acid was now pure. The recrystallization was not good however, in yield. 7.02% is not a good yield.

Benzophenone (1.00g, 0.0054 mole) was measured and added into a 100 mL round-bottom flask. Next, 95% of EtOH (15 mL) was measured and placed in the round-bottom flask and a stir bar was added. The mixture was heated on a sand bath until the benzophenone dissolved completely. The round-bottom flask was removed from the sand bath and it cooled for a few minutes. A preliminary TLC was conducted with 20% ethyl acetate and 80% hexanes solution. Next, NaBH4 (0.100g) was measured and added to the solution

experiment was started with a clear solution of sodium benzoate and HCl was added to it, ultimately producing benzoic acid. First, .3395 g of sodium benzoate was weighed, then it was dissolved in water, causing it to disassociate into ions. Next, 3M of HCl were added drop wise to the solution until it reached a pH of 2, thus introducing the hydronium ion. This addition caused a white, solid benzoic acid to precipitate out of the solution. A vacuum filtration system was used to separate the solid from the

of the experiment was to use extraction to separate and identify the components of a mixture of acid, base, and neutral. This was completed, identifying the components to be benzoic acid (36.4% yield), meta-nitroaniline (52.7% yield), and naphthalene (52.7% yield). These identities were confirmed after separation and isolation using melting point analysis. The melting point observed for the benzoic acid was 121.2-122.5ºC, the meta-nitroaniline’s was 111.5-112.8ºC, and the neutral naphthalene’s melting

Nitration of Methyl Benzoate Abstract: This procedure demonstrates the nitration of methyl benzoate to prepare methyl m-nitrobenzoate. Methyl benzoate was treated with concentrated Nitric and Sulfuric acid to yield methyl m-nitrobenzoate. The product was then isolated and recrystallized using methanol. This reaction is an example of an electrophilic aromatic substitution reaction, in which the nitro group replaces a proton of the aromatic ring. Following recrystallization, melting point and infrared

Result and Discussion In this experiment, the synthesis of benzocaine was carried out by acid catalyst and recrystallization process was utilized to purify the product form impurities. The synthesis of Benzocaine was carried from 4-Amino benzoic acid (PABA) and absolute ethanol with sulfuric acid as catalyst. The reaction took place under reflux, and isolation of product was carried out by using saturated Na2CO3 and dH2O. The characterization of the product involved the NMR and IR spectrum analysis

isolate benzoic acid, benzocaine and 9-fluorenone, each component needed to be separated from one another. All three compounds began together in one culture tube, dissolved in methylene chloride and formed into a homogenous mixture. In this culture tube, two milliliters of aqueous three molar hydrochloric acid was added, which immediately formed two layers, the top acidic aqueous layer was clear in color and contained benzocaine, and the bottom organic formed was yellow and contained benzoic acid and

inserted a capillary tube containing approximately 2 to 3 mm of benzoic acid into a manual Mel-Temp melting point apparatus. With the Mel-Temp dial set between 3 and 4, the temperature increased at a steady rate of approximately 2° C per minute from a plateau set at 90° C. The first appearance of liquid occurred at 119° C, and the benzoic acid completely melted by 122° C giving a melting point range of 119° C to 122° C for benzoic acid. Repeating the procedure for 2-naphthol returned a melting point

the lab was to separate a neutral compound and an acid from an unknown mixture. The DCM (Dichloromethane) was added to create the organic layer. Both the neutral compound and acid were insoluble in water so aqueous NaOH was added. The acid would be deprotonated into an ion, which is soluble in water. Using the separatory funnel, the organic layer was separated from the aqueous layer. HCl was added so that the ion would protonate back into the acid and precipitate out of solution. Vacuum filtration

7) Discussion: In this experiment, the goal is to prepare a Grignard reagent from an unknown aryl halide and identify the identity of the aryl halide by converting it to a carboxylic acid to determine its melting point and molar mass (determined by titration). The experiment began by dissolving 0.25g of magnesium powder in a 25mL round-bottom with 5mL of anhydrous ether and stirring with a stir bar. Then the round-bottom flask was set up for reflux using a Claisen adapter where the vertical part