products through a GC analysis. Free radical reactions are important to understand because they allow chemists to design synthesis of complex molecules from very simple organic molecules. The reagents used were 2‚3-dimethylbutane as the carbon chain‚ t-butyl peroxybenzoate as the initiator‚ and sulfuryl chloride as the source of chloride radicals. The predicted products are 1-chloro-2‚3-dimethylbutane and 2-chloro-2‚3-dimethylbutane based on the primary or tertiary hydrogen being replaced with chlorine
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A General Review of Tetracyclines Antibiotics Chang Liu Instructor: Prof. Jasson Sello Department of Chemistry‚ Brown University Providence 02906‚ RI Tetracyclines are the first broad-spectrum antibiotic to be applied to clinic use. Nevertheless‚ the increasing incidence of bacterial resistance of tetracyclines led to a series of studies on the development of semisynthetic tetracyclines to circumvent the resistant organisms. In order to better design the structures of tetracycline derivatives
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Separating the Layers o Drying Agents o Part 1: The Technique of Neutral Liquid/Liquid Extraction The description is for dichloromethane-aqueous solution mixture‚ but you will use the same technique for your tert-butyl methyl ether-aqueous solution mixture. Note‚ however‚ that the ether is less dense than water‚ while dichloromethane is denser than water. o Part 2: Acid/Base Liquid/Liquid Extraction (p.147-150 middle) 2) THIS HANDOUT: Scheme of
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------------------------------------------------- Background Polysar Limited is Canada’s largest chemical company. Its Rubber Group accounts for 46% of Polysar’s sales. The primary products for this group are butyl and halobutyl and the principal customers for these products are tire manufacturers. The rubber Group has two divisions: NASA (North America & South America) and EROW (Europe & elsewhere). There is product transferring between NASA and EROW and the
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In this experiment‚ we used simple distillation and extraction to do synthesis of 1-bromobutane. The experiment was carried out by mixing 13.3 g of sodium bromide‚ 15 mL of water and 10 mL of n-butyl alcohol in a 100 mL round bottom flask. We cooled the mixture and added 11.5 mL of concentrated sulfuric acid. Then the mixture was heated at reflux with a short condenser for 45 minutes and then we drained out the condenser. We removed the condenser and distillation head was set up to set up the condenser
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Fischer Esterification is when an carboxylic acid and an alcohol reacts to produce an ester‚ catalyzed by a strong acid to protonate the -OH of the carboxylic acid‚ so it leave as water (Ketcha‚ 58). For Fischer Esterification to occur‚ the reaction must be heated up‚ without boiling away‚ for a prolong amount of time by refluxing the mixture (Ketcha‚ 57). Refluxing is the process in which the boiled solution’s vapors are condense back to a liquid and return to the boiled solution (Ketcha‚ 60). The
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What is acetylsalicylic acid? Acetylsalicylic acid (ASA)‚ or more commonly known as aspirin‚ is a medication that can be used for pain‚ fevers‚ and inflammation. It can be used for long periods of time‚ in small amounts‚ to prevent heart attacks‚ strokes and the formation of blood clots. A heart attack victim can be given a low dose right after the ordeal to reduce the risk of another one. Side effects of this drug is ulcers‚ internal bleeding (stomach) and ringing in the ears. These mainly happen
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edu . Am erican Cultures Studies (3 sem ester hours) Santa Monica College students choose one of the follow ing courses: AHIS 72 HIST 10 MUSIC 37 College Writing (3 sem ester hours) Santa Monica College students choose one of the follow ing courses: ENGL 1‚ 31 Com m unication or Critical Thinking (3 sem ester hours) Santa Monica College students choose one of the follow ing courses: BUS 32 COM ST 11‚ 21‚ 35 PHILOS 7 Creative Arts (3 sem ester hours) Santa Monica College students choose
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determination of % ratio by GC and HNMR spectroscopy INTRODUCTION: Figure 1: Formation of ester from carboxylic acid. MECHANISM: When the carboxylic acid is treated along with the acid catalyst and alcohol[R-OH]‚ It gives rise to the formation of ester along with water. Furthermore alcohol is used in an excess amount in the reaction‚ because this reaction is probably in equilibrium. Whereas alcohol
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Both aspirin and oil of wintergreen are esters. Esters are organic compounds which contain the molecular connectivity that expresses the pleasant fragrances and aromas they have‚ which can be observed in fruits and flowers. In modern times‚ the cosmetic industry has employed the use of esters in the production of self-care and vanity products such as perfumes and make-ups. This can also be noted in food and pharmaceutical industries that make use of esters in flavouring agents both in solid and liquid
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