SC/CHEM 3001 3.0 Experimental Chemistry II Experiment A4: Palladium Catalysis: The Suzuki Reaction Abstract In this experiment‚ the Suzuki reaction was performed using phenylboronic acid‚ p-iodophenol and Pd/C catalysis in potassium carbonate aqueous media to synthesize biphenyl-4-ol. The yield of final product was only 11.94% and the measured melting point was 170-175℃. Since the appearance of the product was significantly different from expected light tan color and the measured melting
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sit 15 min. a.ii. Precipitating and drying a.ii.1. After the “hydroxide extract” is cooled‚ acidify with 3M HCl and cool‚ a precipitate will form and crystallization will begin. Filter the precipitate with vacuum filtration and follow the recrystallization procedure with water and IPA. Follow these steps with the “bicarbonate extract” but recrystallize with water and ethanol. The organic solution is dried by adding sodium sulfate until the solution becomes clear. After drying the “neutral compound”
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Formal Report no. 1 Synthesis of Aspirin Chemical Principles Aspirin is most widely sold over-the-counter drug. It has the ability to reduce fever (an antipyretic)‚ to reduce pain (an analgesic)‚ and to reduce swelling‚ soreness‚ and redness (an anti-inflammatory agent). Much of this is believed to be due to decreased production of prostaglandins and thromboxanes. Aspirin’s ability to suppress the production of prostaglandins and thromboxanes is due to its irreversible inactivation of the cyclooxygenase (COX)
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White cloudy liquid Mixture in ice bath White particles settled at the bottom of cloudy white liquid Suction Filtration Filtrate White powdery crystals Residue Clear yellowish liquid Crude Aspirin White powdery crystals Table 3. Recrystallization of Aspirin. Description Crude aspirin + EtOH Clear colorless liquid with undissolved white solids Mixture during heating Powdery white solids dissolve in clear colorless liquid Mixture after heating Clear yellowish liquid Mixture at
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Chem 3100 Thursday 9am-1:45pm Olumba Obu Unknown #: 146 Fall-11 Organic Chemistry Midterm Report 13 October 2011 Table of Contents Separation of Benzoic Acid and Acetanilide 3 Extraction and Purification of Caffeine from Tea 4 Extraction of Trimyristin from Nutmeg 5 Conversion of t-butanol to t-butyl chloride 6 Appendix 7 Calculations 8 Literature and Experimental Values of Benzoic Acid and Acetanilide 9 Experimental Caffeine IR 10 Literature Caffeine
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drop wise; I had allowed the tap to run due to a confusion of the tap mechanism. The mixture therefore went up to 20 degrees and dropped gradually back to 11 degrees .After adding a little over 45mL of methanol‚ in order to start the process of recrystallization‚ my product was still cloudy. I feel I therefore may have added too much to re-dissolve the product. It took time for my product to break down over the steam and dissolve‚ yet eventually‚ suggested by the demonstrator I left it to become fully
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Lab 3: Bromination of Acetanilide CHEM 2110 Hassan Alsaleh 0525970 Due date :11/02/2015 Q1: To find the limiting reagent we need to find the number of moles of acetanilide‚ and the number of moles of Bromine. Mass of Acetanilide used = 0.67g Molar mass of Acetanilide = 135.16g/mol[1] Number of moles of Acetanilide = (0.67g) / (135.16g/mol) = 0‚005 mols Volume of Bromine = 0.25ml Density of Bromine = 3.103 g/ml[2] Mass of Bromine = (0.25ml) X (3.103g/ml) = 0.78g Molar mass of Bromine
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water. Completely dissolved in heat bath. Ones it was completely dissolved‚ and after the vacuum‚ the pure benzoic acid start to appear on top of the filtration paper with a pearl color. At the end of the ice bath the benzoic acid start the recrystallization. The purified and end product of the experiment was .20 grams of pure benzoic acid. Finally‚ the percentage recovered and purified benzoic acid was 40%. Based on this fallowing calculation .20 grams of benzoic acid multiplied
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Coal is made largely of carbon but also features other elements such as hydrogen‚ oxygen‚ sulfur and nitrogen. Coal starts off as a plant matter at the bottom of water and is eventually covered and deeply buried by sediments where over time metamorphosis takes place. When peat is altered physically and chemically. This process is called “coalification.” During coalification‚ peat undergoes several changes as a result of bacterial decay‚ compaction‚ heat and time. Peat deposits are varied and contain
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not destroyed. The reaction can be observed as successful as 9-fluorenol is bright yellow‚ whereas 9-fluorenol is a white color. Approximately 100 mg of crude product is obtained through this experiment. Recrystallization occurs‚ however there is not one pure solvent that allows for recrystallization of 9-fluorenol. Thus‚ multiple solvents will be added together‚ water and methanol‚ the ratio of water to methanol must be determined for this to occur. Therefore‚ 1 mL of methanol will be added to the
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