2950 cm-1 sp2 C-H stretch 3100 cm-1 C=O - ketone 1715 cm-1 C=C alkene 1680 cm-1 O O d. e. f. OH sp3 C-H stretch 2950 sp C-H stretch 3310 cm-1 CC alkyne stretch 2220 cm-1 cm-1 sp2 C-H stretch 3100 cm-1 sp3 C-H stretch 2950 cm-1 C=C alkene 1680 cm-1
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with another carbon in a benzene ring. Therefore‚ this rules out all the alkanes and just leaves the phenyl hydrocarbon
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Synthesis of Isopentyl Acetate (Banana Oil) Using a Fischer Esterification Reaction Zhenshu Wang (Stan) TA: Aaron League September 23‚ 2012 Purpose: The purpose of the experiment was to perform the acid-catalyzed Fischer Esterification of acetic acid and isopentyl alcohol to form isopentyl acetate‚ or banana oil‚ which is used in flavor industries. The equilibrium of the reaction was changed by adding an excess amount of acetic acid. The reaction was refluxed and product was purified by extraction
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PREPARING CYCLOHEXENE FROM CYCLOHEXANOL INTRODUCTION Alkenes can be prepared in the lab by dehydrating the corresponding alcohol. Concentrated sulphuric and phosphoric acids both act as dehydrating agents. Phosphoric acid is preferred because it gives a higher yield of the alkene. Concentrated H2SO4 reacts with alkenes. SAFETY Eye protection must be worn. Concentrated phosphoric acid is corrosive. Mop up spillages immediately with plenty of water. Cyclohexene and cyclohexanol are
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om *2925136620* CHEMISTRY Paper 3 (Extended) 0620/33 May/June 2012 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams‚ graphs
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cyclohexene with water. The formation of product cyclohexene which is reweight and adding of bromine the last reagent for confirming that is alkene known as bromine test which leads to colour changes. Yet this experiment reflects some important discussion and conclusion for the formation of cyclohexene. INTRODUCTION One of the common ways of preparing an alkene is through the dehydration of an alcohol. Cyclohexanol‚ the reagent of this experiment‚ is used in the production of nylon‚ paints‚ plastics
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Product The terminal alkene is the least substituted and therefore the least favored. 3) The starting alcohol consisted of a mixture of stereoisomers. Draw all the possible stereoisomers of 2-methylcyclohexanol. 4) The reaction you carried out is considered to be reversible. Write an equation for the equilibrium constant (Keq) for the reaction in terms of the concentrations of reagents. Give 2 reasons why your reaction favored the formation of alkenes. We were removing
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bond. Both of the reactants are non-polar but there is an induced polarity during the reaction due to the electron-rich site at the double bond‚ which results in bromine acting as an electrophile. In this reaction‚ the cinnamic acid reacts as an alkene. Alkenes are unsaturated hydrocarbons with a carbon-carbon double bond. In a double bond‚ a pair of electrons lies between the carbon atoms in a σ bond and the other pair of shared electrons lie above and below the plane in a π bond. This electron rich
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Polymerization reaCTIONS polymers are high-molecular-weight compounds‚ fashioned by the aggregation of many smaller molecules called monomers. Ex. plastics that have so changed society and the natural and synthetic fibers used in clothing are polymers. Classification of polymers Homopolymers - consist of repeated long chains or structures of the same monomer unit. Ex. PVC(polyvinyl chloride) Copolymers - polymers that consist of more than one molecule. Trimers - molecules consisting
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Part I (20 marks) – Multiple Choice (2 marks each). Use the structure below to answer questions 1-7. 1. How many degrees of unsaturation are found in the above compound? a) 2 2. c) 4 d) 5 e) 6 What term best describes the alkene in the above compound? a) R 3. b) 3 b) S c) Z d) E e) trans What is the configuration of the chirality centres (stereocentres) labelled 1 and 2 in the above compound? a) 1 is R and 2 is S b) 1 is R and 2 is R c) 1 is S and
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