Ethyl acetate

methyl benzoate, β-phenyl ethyl acetate, methyl cinnamate and cinnamyl acetate possibly contributed to the overall aroma…

The purpose of experiment 02 is to separate two solid compounds, benzanilide and thiourea, from a crude mixture, then verify the purification. The experiment is to be broken down into several stages: (a) In order to perform small-scale recrystallization, a suitable solvent must be selected. (b) The actual small-scale recrystallization is performed on the benzanilide-thiourea crude mixture. (c) Filtration of purified crystals. (d)Product recovery is calculated and measured. (e) In order to…

Identifying an Unknown Compound Using Various Chemical Analysis Techniques Joshua Nash and Aquilla Young Abstract The introduction of this lab report exposes the reader to the different scientific concepts that are to be used such as melting point calculations, retention factors, and solubility in various aqueous solutions. The experimental provides the basics of using a melting point apparatus, determining solubility, and performing thin layer chromatography. In the results section the findings…

short ends. Then place one drop of the caffeine solution on the line and next to it one drop of the pure caffeine sample on the line. The chromatographic plate was placed into a jar, or a developing chamber, that contained 3 mL of ethyl acetate. Once the ethyl acetate reached the top line, the plate was carefully removed from jar, and the jar was capped. The plate was placed under a UV lamp, in order to see the location of the chemicals and they were circled in pencil, shown in Figure 1. The…

114.10, 118.93, 124.19, 126.56, 127.94, 128.61,144.72, 175.19 ppm; MS (70 eV) m/z (%): 273.1 (M+, 100.00). HPLC Purity=99.52%. cis-[2-methyl-6-(trifluoromethoxy)-1,2,3,4-tetrahydroquinolin-4-yl]azepan-2-one (3g) Elution from silica using 10% ethyl acetate in hexane afforded the title compound (3g) as a white solid. 1H NMR (300 MHz, CDCl3): 1.22 (d, J=6.3 Hz, 3H), 1.51-1.31 (m, 1 H), 1.86-1.53 (m, 6 H), 2.04-1.97 (m, 1 H), 2.68-2.64 (m, 2 H), 3.17-3.02 (m, 2 H), 3.57-3.51 (m, 1 H), 3.80 (s, 1…

Demonstrate the process of extraction and purification by obtaining crude caffeine from a tea bag. Procedure: Isolation of Caffeine from Tea Leaves One tea bag was obtained and weighed. A 250 mL Erlenmeyer flask was acquired with 0.3 grams of sodium carbonate. The tea bag was placed inside the flask with 100 mL of water and the 0.3 grams of sodium carbonate. Then, a boiling chip was added to the flask and the flask was placed on a hot plate. Sodium carbonate was added to the flask because it…

On the other two slides label the one side C for 1,2-dimethoxybenzene and the other side D for a 1,2-dimethoxybenzene previously mentioned chemicals. Place one of each kind of slide in a beaker of 9:1 hexane-ethyl acetate place the other two slides in a beaker of 1:1 hexane-ethyl acetate. Allow the solvents in the jar to move up the TLC slides until the solvents are about 1 cm away from the top of the TLC slide and mark the solvent front or the point at which the solvent rises. Take the slides…

1.2.2. Influence on nutritional attributes Apple and pear cultivars are well known for being good sources of antioxidant properties, especially for their content of polyphenolic compounds concentrated in their skin. Apples contain natural sugars, organic acids, dietary fiber, minerals and vitamins, whereas pears are good sources of fiber and micronutrients such as chlorogenic acid, flavonols and arbutin (Sinha 2012). In general, pear juice is characterized by similar soluble solids content than…

Methods and Materials 0.4g maleic anhydride and 1ml ethyl acetate was added to a test tube and mixed until dissolved. 2ml hexane was then added to the test tube, followed by 0.4ml cyclopentadiene. The test tube reacted for 5 minutes in a test tube rack and then 2 minutes in an ice-bath to allow for complete crystallization. The crystals were then put through the filtering apparatus to collect and dry all the crystals. About 3ml was used to rinse the crystals while in the apparatus. The…

bed, and immediately start to collect it in the sample vial labeled “F” 12. After all of the ferrocene has been collected, place the flask labeled “organic solvent” under the column 13. Repeat Steps 9 through 12, but instead replace hexane with ethyl acetate, and use the sample vial labeled “AF” to collect the orange acetylferrocene. 14. Lastly, the two sample vials are to be evaporated using the rotary evaporator, and then has to be weighed and recorded.…