ethene‚ the diene must be able to exist in an s-cis conformation‚ in which the carbon atoms that bond to the dienophile are on the same side of the C-C single bond. Concerning the stereochemistry of the product‚ the Diels-Alder reaction is stereo selective‚ usually yielding only one of several possible stereoisomer. The addition of maleic anhydride to a diene yields entirely the endo product in which the bulkier parts of the dienophile are closer to the carbon-carbon double bond.Dienes and trienes occur
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CLASSIFICATION TESTS A. Acids There are relatively few suitable tests for carboxylic acids. Classification is based mostly upon solubility tests. If the compound is water soluble‚ test the aqueous solution of your compound with pH paper (also check the pH of the original water). If the compound is water-insoluble and it dissolves in 5% (1.5M) sodium hydroxide and 5% NaHCO3 solutions as performed in your solubility tests‚ it can be classified as a carboxylic acid. Establish an equivalence value
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API PRESENTATTION Some Definitions- Active Pharmaceutical Ingredient (API): A substance or compound that is intended to be used in the manufacture of a pharmaceutical product as a therapeutically active compound (ingredient) Enantiomers: cpds with same molecular formula as substance but differ in spatial arrangement of atoms and are non-superimpossable mirror images Polymorphism: Occurrence of different crystalline forms of the same substance Degradation product : Molecule resulting
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ELECTROPHILIC ADDITION PURPOSE The purpose of this lab is to learn how to synthesize 2-methyl-2-butene into 2-bromo-2-methylbutane using addition of hydrogen bromide. THEORY Chemical Compound Molecular Formula Molecular Weight Boiling Point Melting Point Density Amylene CH3CH=C(CH3)2 70.13 g/mol 36 oC -134 oC 0.662 g/ml Hydrobromic Acid HBr 80.91 g/mol 126 oC -11 oC 1.490 g/ml 2-Bromo-2-MethylButane C5H11Br 151.05 g/mol 107 oC 1.18 g/ml Sodium bicarbonate NaHCO3 84.007 g/mol Decomposes
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ONE-SCHOOL.NET Short Notes: Form 5 Chemistry Rate or Reaction Calculation Rate of Reaction (Average Rate) Rates of reaction = Quantity change of reactants/products Total time for the reaction If the quantity change is immeasurable Rates of reaction = 1 Total time for the reaction Find the Rate From a Graph Average Rate Rates At an Instant The rate of reaction is equal to the slope of the graph The rate of reaction at an instant‚ t‚ is equal to the of quantity against
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in vehicles that reduced pollutants in car exhaust and because of the potential for causing brain damage in children. Great Lakes interest in Octel was a chemical called bromine that was used to make the lead additives. This chemical was used by Great Lakes to produce several other products and in efforts to obtain the bromine‚ Great Lakes decided to risk taking on the ethical
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* Introduction to Organic Chemistry Understand the basis of drawing organic structures Depicting 3-D structures in 2-D Most organic compounds have a three-dimensional structure. How do we represent structures on our two-dimensional page? For example‚ methane is a tetrahedral molecule: Bonds in the plane of the paper: Bonds coming towards the observer: (out of the page) Bonds going away
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a few drops of bromine water into the boiling tube containing the gascous products. The brown colour of bromine water disappeared immediately. Why? The products of cracking contained unsaturated (hydrocarbons) / alkenes / C=C / ethane / reasonable name of alkene‚ which decolourised the bromine water immediately by addition reaction (2) (II) The student then dropped more bromine water into the boiling tube until the brown colour of the bromine water persisted
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Title: Diffusion in Gases I Aim: To observe the diffusion of bromine Apparatus and Materials: Glass tube‚ bromine‚ fume chamber Diagram: Procedure: -Liquid bromine was placed in a jar and covered Observations: When first placed in the jar the original color of bromine was red-brown. As it began to diffuse its color changed from dark brown to a lighter brown until it becomes a yellow-like orange color. As it was diffusing liquid bromine changes its state to gaseous. With an odour given off smelling
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Write your name here Surname Other names Edexcel Certificate Edexcel International GCSE Centre Number Candidate Number Chemistry Unit: KCH0/4CH0 Science (Double Award) KSC0/4SC0 Paper: 1C Monday 14 January 2013 – Morning Time: 2 hours Paper Reference KCH0/1C 4CH0/1C KSC0/1C 4SC0/1C You must have: Calculator Ruler Total Marks Instructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name‚ centre number and candidate
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