Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen’s Catalyst Justin Lindsey 12/08/96 Chem 250 GG Professor Tim Hoyt TA: Andrea Egans Abstract. 1‚2 diaminocyclohexane was reacted with L-(+)-tartaric acid to yield (R‚R)-1‚2-diaminocyclohexane mono-(+)-tartrate salt. The tartrate salt was then reacted with potassium carbonate and 3‚5-di-tert-butylsalicylaldehyde to yield (R‚R)-N‚N’-Bis(3‚5-di-tert-butylsalicylidene)-1‚2-cyclohexanediamine‚ which was then reacted with Mn(OAc)2*4H2O
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the stratosphere due to its faster destruction by chemicals released by man into the environment. Depletion is mainly caused by chlorofluoro carbons (CFCs)‚ halons‚ methyl chloroform and carbon tetrachloride. There substances contain chlorine or‚ bromine which‚ can reach the stratosphere. These elements are capable of catalytically breaking down ozone into oxygen. Ozone depletion can also be caused by supersonic jet exhausts. They liberate NO which reacts with 03 to form N02 and 02 The area on the
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Topic Acid-Base Theory (Unit 1) Acid-Base Theory (Unit 2) Isomerism (Unit 1) Isomerism (Unit 2) Nomenclature Reaction Mechanism (Unit 1) - Introduction to Mechanism Reaction Mechanism (Unit 2) - Nucleophilic substitution Reaction Mechanism (Unit 3) - Nucleophilic substitution Reaction Mechanism (Unit 4) - Nucleophilic substitution Reaction Mechanism (Unit 5) - Nucleophilic substitution Reaction Mechanism (Unit 6) - Nucleophilic substitution Reaction Mechanism (Unit 7) - Elimination Reaction Mechanism
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CHEMISTRY 221 LABORATORY�QUANTITATIVE ANALYSIS EXPERIMENT: DETERMINATION OF ASCORBIC ACID IN VITAMIN C TABLETS THEORY: Ascorbic acid‚ C6H8O6‚ MM = 176.13‚ can be oxidized to form dehydroascorbic acid by bromine via the following reaction: The bromine or iodine used in the titration is generated by adding an excess amount of KBr or KI to an acidified solution of the sample according to the following reaction: BrO3- + 5 Br- + 6 H+ 3 Br2 + 3 H2O IO3- + 5 I- + 6 H+
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Experiment 13: Synthesis of 1- Bromobutane An SN2 Reaction Theory: One of the methods of preparing alkyl halides is via the nucleophilic substitution reactions of alcohols. Alcohols are inexpensive materials and easy to maintain. However‚ they are a poor leaving group the OH group is a problem in nucleophilic substitution‚ this problem is fixed by converting the alcohol into H2O. Objective: The objective of this lab is to observe the synthesis of 1-bromobutane in an SN2 reaction‚ to see how
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meta-directing. Reactions: Electrophilic aromatic substitution rxns‚ Nucleophilic aromatic substitution rxns (via benzyne or substitution-elmination)‚ Diels-Alder (endo/exo‚ inter/intramolecular)‚ Diene 1-2 and 1-4 electrophilic addition‚ Eliminating bromine from arenes via Grignard‚ Carboxylation of arenes via Grignard 4 Properties of: Amines (pkAs and resonance structures for aromatic and aliphatic molecules)‚ amides (sp2 hybridized by amide bonds)‚ anilines (aromatic amines) Structure of: Sugars
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Pluto’s moon? -CHARON 19. The 3 main parts of a comet are the nucleus‚ the tail‚ & the? -COMA 20. What human organ cleans fifty gallons of blood everyday? -KIDNEY 21. What’s the only metal that’s not a solid at room temperature? -BROMINE 22. English chemist & physicist discovered hydrogen. - HENRY CAVENDISH 23. From whta school did the nursing board topnotch of 2007 came from? -OUR LADY OF FATIMA 24. Which type of matter has a definite volume but no definite shape? -MATTER
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Starbucks Corporation Since implementing its supplier social responsibility standards in 2006‚ Starbucks has engaged in more than 500 factory assessments and continues to work with more than 70 factories on improving their social and environmental standards. As part of its 2015 global-responsibility goals‚ Starbucks aims to volunteer one million community service hours globally. Starbucks has achieved LEED certification for 116 stores in 12 countries‚ with 69 per cent of company-owned stores
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carbonyls. Grignard reagents are any of the numerous organic derivatives of magnesium (Mg)‚ commonly represented by the general formula RMgX (in which R is a hydrocarbon radical: CH3‚ C2H5‚ C6H5‚ etc.; and X is a halogen atom‚ usually chlorine‚ bromine‚ or iodine). They are called Grignard reagents after their discoverer‚ French chemist Victor Grignard‚ who was a corecipient of the 1912 Nobel Prize for Chemistry for this work (1). Grignard reagents commonly are prepared by reaction of an alkyl
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Periodic Table The periodic table is a table‚ where all known chemical elements are arranged. They are organized on the basis of their atomic numbers‚ electrons and chemical properties. The atomic of an element is the same as the number of electrons or protons in that particular atom. They elements in the table are placed in order from the lowest to the highest. 429768018669000The periodic table is ordered into periods and groups. A row of elements across the periodic table is calleda a period
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