of water before beginning the reaction. Upon the addition of 85% phosphoric acid and sulfuric acid and stirring in the simple distillation the clear solution turned pinkish. Heating began and the pink color of the solution
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product‚ why selective?‚ is this molecule chiral?) Bromine was added to Estilbene to form an anti product. This happened because no true carbocation was formed in reaction. Instead‚ there was an intermediate where one of the bromine atoms was partially bonded to both carbon atoms of the double bond. This prevented bond rotation around the carbon-carbon bond. The steric hindrance prevented the bromine from being added to the same side as the first bromine atom. Thus‚ the process of bromination was stereoselective
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I. Objectives * Be able to prepare cyclohexene from the dehydration of cyclohexanol * Understand the mechanisms of the dehydration reaction (acid-catalyzed dehydration). * Know how to use the necessary equipment for this reaction‚ such as the fractioning column. * Obtain positive results in unsaturation tests for the presence of carbon-carbon double bond (cyclohexene). II. Background Cyclohexanol‚ the reagent of this experiment‚ is used in the production of nylon
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Purpose: a) To identify saturated and unsaturated hydrocarbons using properties and reactions. b) Study substitution and addition reactions. Equipments test tube rack (1) test tube holder (2) 100 mL beaker medium test tube (6) Materials cyclohexene toluene n-hexane conc. H2SO4 Br2/CCl4 or Br2/CH2Cl2 0
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of trans- Stilbene to form 1‚2- Dibromo- 1‚2-diphenylethane Abstract 1‚2-dibromo-1‚2-diphenylethane was produced by the bromination of trans-stilbene through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR was used to
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Description The students titrate different oils and fats mixed with Volasil against bromine water. Apparatus and equipment (per group) w White tile w Conical flask w Dropper pipette. (Use the type of teat pipette usually fitted to Universal Indicator bottles‚ that do not allow squirting – eg Griffin.) w Burette (filled with bromine water) w Boss w Clamp w Stand. Chemicals (per group) –3 w Bromine water (Harmful and irritant) 0.02 mol dm (This concentration does not have to be accurate
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Gebregziabher Discussion and Conclusion: Addition reaction of Alkenes: Bromination of (E)-Stilbene 1. Addition reaction is a reaction that involved two molecules that combine to make a larger product. Addition reaction has two main types‚ electrophilic addition and nucleophilic addition. An electrophilic reaction is when the pi bond of a molecule is removed to make two covalent bonds that are bonded to two new molecules. A nucleophillic addition is a reaction that removed the pi bond from
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(colorless liquid) Data/Observations: Test Bromine addition Alkane Mixture of hexane and dichloromethane was originally clear liquid. After adding 3 drops red color Br2/CH2Cl 2 the solution turned orange. Orange color held. Alkene Alkene used was pentene. Originally clear liquid. After addition‚ solution turned yellowish at first but then turned clear after a few minutes of sitting. Alkyne Alkyne used was toluene. Originally clear liquid. After addition‚ solution turned orange. Orange maintained
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Analysis of Hydrocarbons Jessa Grace B. Castillo* and Stephanie Chua Department of Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines ______________________________________________ Hydrocarbons are organic compounds containing only hydrogen and carbons and further divided in major types. Hydrocarbons react differently in reagents. The basis of determining an unknown hydrocarbon is due to the differences in reactions of hydrocarbons. An unknown compound is determined using tests.
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Procedure: The addition of 4.0 mL cyclohexanol‚ 1.0 mL of 85% phosphoric acid‚ and one boiling chip‚ were all added to a 10 mL round bottom flask that would be attached to the end of an assembled simple distillation set up. A sand bath was placed atop a hot plate‚ and the simple distillation mechanism was lowered into the sand bath with the bottom most piece (the 10 mL round bottom flask) submerged about half way. The distillation process was completed after a sufficient amount of liquid distillate
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