Synthesis of Aspirin (Acetylsalicylic Acid) Abstract: This experiment is about the synthesis of aspirin under laboratory conditions. Aspirin is prepared by reacting salicylic acid and acetic anhydride; in the presence of sulfuric acid. After fully dissolving the salicylic acid with acetic anhydride‚ the solution is cooled and cold water is then added. Once the crystals form they are then filtered and left to dry out. There mass is measured and recorded then the yield is calculated. Introduction:
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4.03 The Decision Judicial Opinion Template Instructions: Replace the information in parentheses with your own work according to the assessment instructions. Hazelwood v. Kuhlmeier I‚ Richard Enerson‚ write this opinion to support the majority opinion on the case of Hazelwood v. Kuhlmeier. I am in support of the majority opinion because I firmly believe the principal was not violating the student’s first amendment rights by censoring the articles. While students do have the right to speech‚ it should
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Palladium typically exists in the oxidation states of 0‚ +2‚ and +4. PdCl2 is usually the starting compound for several other heterogeneous palladium catalysts such as Pd/C and Pd/BaSO4.1 Suzuki coupling is an efficient way to
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Multistep Synthesis of Benzilic Acid The synthesis of several complex organic compounds follows a multistep synthesis. "Multistep synthesis" refers to the procedure in which the product of one reaction serves as the starting material in the subsequent reaction. The multistep synthesis of benzilic acid begins with a conversion benzaldehyde to benzoin through a condensation reaction. The benzoin then oxidizes into benzil‚ which undergoes rearrangement to give benzilic acid. Benzoin Synthesis * When
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Abstract This experiment investigated the kinetics of the enzyme glycogen phosphorylase b which is important to metabolism. AMP is an allosteric activator of the enzyme because it converts glycogen phosphorylase b from its T state to the R state which is the active form. Caffeine is an inhibitor because it binds the nucleoside inhibitor site. When it binds this site‚ it stabilizes the inactive T state and blocks the catalytic site which needs to be open for enzyme activity to occur. The glycogen
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coming to class so that you will be prepared to start the reaction when you arrive. Write an introduction in your lab notebook. reagent volume density mass 4-ethylphenol x x 150 mg 25 % NaOH (aq) TBAB 1.250 g/ml x x methyl iodide 4-ethylanisole soln: NaOH: MW mmoles eq 1.00 1.59 0.045 2.61 x x Procedure Set up the reaction: • Add 4-ethylphenol‚ sodium hydroxide‚ and a spin vane to 5 ml conical vial and heat gently until it turns to a liquid. • Add tetrabutylammonium bromide‚ then top
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Grignard Synthesis of Tirphenylmethanol David Szuminsky Organic Chemistry Lab II Shaopeng Zhang Monday 1PM 2/10/14 & 2/24/14 - Abstract A sample of triphenylmethanol was prepared using Grignard synthesis techniques. Reflux was used in order to speed up the reaction and the final product was purified using recrystallization methods. The percent recovery and percent yield were 80.46% and 47.526%‚ respectively. A melting point range of 85-87oC was obtained from
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It is so crucial because it allows for the understanding of how molecules interact in order to create new products. Generally speaking‚ multistep synthesis could be useful in a practical application such as pharmaceutical chemistry. Synthesizing aspirin is a common example of a multistep synthesis reaction. Aspirin is typically taken as a painkiller or as a reducing-agent for fevers. In order to synthesize this product‚ the reactants salicylic acid and acetic anhydride
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polymerization catalyst [14]‚ fluorescent whitening agents[15]‚ organic brightening agent[16]‚ stabilizer against heat‚ visible light‚ ultraviolet light and aging[17]. [3]3‚ 2’‚ 4’‚ 6’-tetrahydroxy-4-propoxy-dihydrochalcone-4-β’-neohesperdoside has been used as synthetic sweetener and is 2200 times sweeter than glucose [18]. [4]They contain a keto-ethylenic group and are therefore reactive towards several reagents e.g. (a) phenyl hydrazine‚ (b) 2-amino thiophenol etc. [5]The chalcones have been found
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Purpose Acetophenetidin can be formed through two methods‚ Williamson ether synthesis and amide synthesis. By working in groups of two we were able to complete both methods of synthesis routes. The end result should be the synthesis of a similar product‚ by verification between the two individuals. Reaction Experiment and Observations Amide Synthesis of Acetophenetidin The Synthesis reaction began by removing the colored impurities from the p-phenetidine‚ accomplished by mixing
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