Introduction The Diels-Alder Reaction is a reaction used in organic chemistry that builds rings very efficiently (1)‚ this cycloaddition process allows for the stereoselective formation of cyclohexene rings possessing as many as four contiguous stereogenic centers (3). This reaction occurs without intermediates‚ in a single step‚ which explains the stereospecificity due to substituents not being given the chance to “switch around”. (1)These six membered rings are synthesized by reacting a dienophile
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Colin Burlison 1/9/13 AP European History Thermidorian Reaction DBQ In the time of the National Convention‚ (a governmental body existent for three years of the French Revolution) the government desired for total change from the Old Regime. The final change stemming from this desire was the introduction of the French Republican Calendar. In 1789‚ the Cahier de doléances (report of grievances)‚ from the Third Estate of Château-Thierry‚ said that they asked for the number of religious
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Jasmine Land Mrs. Bond GE 100- Grammar and Usage April 23‚ 2013 Argumentative Synthesis: For Abortions Before 1967‚ abortion was illegal in the UK. However‚ backstreet abortions were done‚ often ending in permanent injury or death. The 1967 Abortion Act was introduced to provide a safe alternative to backstreet abortions (Abortion). In 1973‚ the Supreme Court handed down its Roe v. Wade and Doe v. Bolton decisions legalizing abortion in all 50 states during all nine months of pregnancy‚ for
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REACTION PAPER (ON-PREMISE CATERING) During our on- premise‚ I’ve learned a lot of things like how to prepare that kind of event‚ how to set up‚ how to prepare everything. And to become success the event we must cooperate‚ be unite so that would finish as soon as possible‚ that day were so busy‚ each everyone of us was working‚ but there are some times who are not working‚ of course we can’t avoid that‚ but we are trying our best 2 finish it. There program was started‚ everyone and everything was
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formation of barium white‚ the reaction involved was a double displacement reaction in which sodium in sodium sulfate being more reactive‚ was replaced by barium from barium chloride and was able to form barium sulfate‚ a white solid pigment and sodium chloride 2. As barium sulfate is insoluble in water it was relatively easy to observe and interpret what was happening as the chemicals mixed 2. The formation of zinc yellow also involved a double displacement reaction 3. The addition of zinc sulfate
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a maximum 70% yield of ester usually is not considered to be acceptable for a synthesis reaction‚ instead it is considering as a poor yield of ester. The synthesised ester can only have a maximum yield of 70% because for ester in which the carboxylic acid and alcohol are sterically unhindered‚ a same ratio mixture of carboxylic acid and alcohol can only synthesis ester with a maximum yield of 70% ester as the reaction with the same ration of mixture will reach a state of equilibrium‚ which the concentration
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INSIDE JOB | TRAJANO‚ ALMIRA L. BSA803 | | Reaction Paper | This crisis‚ the United States and the world is facing is the effect of the lack of control and regulation on certain financial activities. Because of the continuing opposition of different individuals and companies with the imposition of regulations on these financial activities‚ it continued to be uncontrolled under the administration of different Presidents of the United States. Due to advances in technology‚ many
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11 April 2013 Profesor Maria Duarte Reaction Paper 3.The national agenda of Porfirio Díaz oriented Mexican economy toward exportation and growth‚ how did Díaz’s modernizing agenda affected elite and lower-classes in the process? Porfirio Diaz was known as a ruthless revolutionary who revolutionized Mexico first by gaining presidency by paying off his opposition and allies along with war. Diaz system failed in the end because he failed to build an enduring system that could have outlived
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Experiment # 3 Acetylsalicylic Acid Introduction: The purpose of this experiment is to create and isolate pure acetylsalicylic acid from the substances salicylic acid and acetic anhydride. Then one will find the melting point to determine purity. Procedure: Make a hot bath. Weigh some salicylic acid and place in conical vial. Add .480mL of acetic anhydride and a drop of concentrated phosphoric acid. Drop in a magnetic spin vane and attach air condenser to vial. Partially submerge it in
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human‚ requires energy from varying food sources to survive. However‚ when cells break down food into its sugar components‚ i.e glucose‚ they cannot use the components directly because glucose holds a lot of energy it would be inefficient to use for reactions that don’t need a lot of energy. Imagine you want to buy pencils for $5 from a store that won’t give change‚ it is more economical to use a $5 or $10 bill than a $100‚ that way there is less waste. Well‚ the same concepts apply to energy use in cells
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