chemical reaction between functional groups of a diisocyanate and a Polyol. First developed in late 1930s‚ polyurethanes are some of the most versatile polymers. The diisocyanate can either be aliphatic‚ (hexamethylene diisocyanate) or aromatic like toluene diisocyanate. Examples of diols are ethylene glycol or even polyethylene glycols‚ with greater Mr. Synthetic polymers‚ like polyurethane‚ are produced by reacting monomers in a reaction vessel. In order to produce polyurethane‚ a step also known
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1997 – 2006: A Report to the American Can cer Society. 1998. 12 Feb. 2007. . "Hydrogen Cyanide." Wikipedia: The Free Encyclopedia. 2007. 20 Feb. 2007. . "Toxic Emissions Statement: Top 6 Toxins." Canadian Health Network. 2005. 12 Feb. 2007. . "Toluene." Wikipedia: The Free Encyclopedia. 2007. 20 Feb. 2007. . "What Are Common Uses of Cigarette Smoke Ingredients?" Canadian Health Network. 2005. 12 Feb. 2007. .
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CHEM 2204 Chromatography Lab by wyk.wong » Fri Jul 11‚ 2014 10:25 am Results and Calculations Rf values Rf=(Distance moved by the spot (cm))/(Distance moved by the solvent front (cm)) Toluene: Rf=2 cm/3.8 cm=0.53 (Fluorenone) Rf=1.1 cm/3.8 cm=0.29 (Fluorene) Hexane: Rf=1.8 cm/2.2 cm=0.82 (Fluorene) Rf=0 cm/2.2 cm=0 (Fluorene Table 1: Experimental IR peaks compared to literature IR peaks for fluorenone Functional group Experimental peak (cm-1) Literature peak (cm-1) C-H 3010.5 3013
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What is huffing? The intentional breathing of gas or vapors with the purpose of reaching a high. What does huffing do to the brain? Changes the electrical activity of the brain. On a elecroencephalograpghy‚ (or EEG) the brain will show up as sharp impulses. What toxic effects and the "risks" that occur with this practice on the body. The brain: changes the electrical activity within the brain‚ possibly resulting in hallucinations and convulsions. Also the center of emotional behavior
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sulphuric acid will act as electrophile. C5H10 + H2SO4 ==> C5H11.HSO4 For the aromatic hydrocarbon‚toluene doesn’t react with bromine water. This is because Br2 is electrophilic enough to attack double and triple bonds‚ but not electrophilic enough to attack the pi bond system of the benzene ring of toluene.For the reaction of between toluene and aqueous potassium manganate the reaction will change the toluene to benzanoic acid and the color of potassium manganate change from purple to slight purple Objective
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use to differentiate diethyl ether from ethanol is water. Diethyl ether is only slightly soluble in water unlike ethanol which is completely soluble. c. toluene and benzaldehyde The best solvent to use to differentiate toluene from benzaldehyde is concentrated sulfuric acid (H2SO4) since benzaldehyde is soluble in sulfuric acid unlike toluene. d. tert-butyl chloride and tert-butanol The best solvent to use to differentiate tert-butyl chloride and tert-butanol is water since tert-butanol is very
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or SN2). OH O H H Br H + :Br : SN2 :Br : O H H Br + H2O OH O H Br O + H2O + :Br : SN1 :Br : Br 7. Give the structure of the principal organic product formed by photochemical bromination of methylcyclopropane‚ draw the mechanism of the reaction. Br2‚ h h Br Br H . .Br Br Br Br 2Br . . + HBr Br + .Br
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Crystallization and Melting Points Organic Chemistry 221 9/19/2012 Intro/Purpose: The purpose of this lab was to use crystallization to separate a compound from a solvent and be able to choose the best solvent to do so. Then identify an unknown and verify purity using melting points. Solubility contributes to crystallization; because a solute has lower solubility at lower temperatures‚ which makes the solvent separate from the solution as a solid. This process is important to understand because
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Analysis of Hydrocarbons Jennifer Alambra‚ Ma. Nancy Anulat‚ Alfonso Apepe*‚ Jacqueline Arsenal 3Bio4 Department of Biological Sciences - College of Science‚ University of Santo Tomas‚ Manila ABSTRACT The unknown hydrocarbon sample was differentiated and characterized by the use of three tests. The outcomes of these tests are as follows: Nitration test (negative)‚ Bromine test (positive) and Basic Oxidation test (positive). From these results the unknown sample can be classified
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The Separation of a Liquid Mixture by Simple Distillation Objective The purpose of doing this experiment is to separate two miscible liquids samples of cyclohexane and toluene using simple distillation. The objectives will be to record boiling range and volumes (mL) of distillates that are attained during the process of distillation. Background Distillation is a frequently used technique for separating mixtures based on differences in the boiling points of components in the mixture. The
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