get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds. In addition‚ alkanes‚ alkenes‚ and alkynes are the parts of the organic and inorganic compounds. We also can learn about the structural formula they all have in different form. Polymerization is another type of chemical reaction that we get to know. There is also a difference
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Name : ……………………………………………………………….. Date Due : …………………………………………………………….. Year 12 80% A 70% B AS Level Chemistry 60% C 2008 – 2009 50% D 40% E Below U Questions on % Haloalkanes 2.8 32 1. Chloromethane can be prepared by a reaction between methane and chlorine in the presence of ultraviolet radiation. (i) Outline the mechanism for this reaction. .....................................................................................
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mixture known as natural gas. The main constituents of the natural gas are methane‚ ethane‚ propane and butane. CLASSIFICATION OF HYDROCARBONS: HYDROCARBON Acyclic or Aliphatic Carbocyclic or Cyclic ( Open chain) Alicyclic Aromatic Alkanes Alkenes Alkyne Cycloalkanes Cycloalkenes Cycloalkynes Alkanes:- Paraffins General formula CnH2n+2 sp3 hybridisation C–C bond length 1.15 4 A0 Chemically unreactive Show chain‚ position and optical isomerism. Heptane has 9 isomer‚ Octane
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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P. Stonebraker Organic Chemistry II lecture UCB Extension Spring 2013 Extra Credit Report Papers Paper is strictly optional. Write a 4-6 page paper on a subject approved by the instructor (either picked from the list below or picked by yourself). Emphasis in the paper should be on the organic chemistry associated with the subject (how it is synthesized‚ uses‚ etc.). No two students can research the same subject. Maximum value of the paper will likely in the 20-40 point range‚ depending
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Alkenes by Elimination Kyle Peterson Chem. 243a Matt Judd‚ Sec. 25 Date Performed: 11/12/03 Abstract: The objective of this experiment is to successfully perform a dehydration of a 2-butanol and a dehydrohalogenation of 2-bromobutane to form the products 1-butene‚ trans-2-butene‚ and cis-2-butene. It was found that a dehydration of 2-butanol yielded 4.6% 1-butene‚ 67.3% trans-2-butene‚ and 28.1% cis-2-butene‚ and a dehydrohalogenation of 2-bromobutane yielded 19.1% 1-butene‚ 69.9% trans-2-butene
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ISOMERIZATION OF AN ALKENE Martin‚ Marilen1‚ Lovenia‚ Melden D.2 1Professor‚ School of Che-Chm-BE-MSE‚ Mapua Institute of Technology; 2Students‚ Chm145L/A41‚ School of Che-Chm-BE-MSE‚ Mapua Institute of Technology ABSTRACT The experiment was conducted to accomplish the following objectives. The first objective aims to synthesize an isomer of alkenes. This was done by converting maleic acid to fumaric acid. This conversion was accomplished by applying a heat-catalyzed reaction on maleic acid
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Dehydration of an alcohol • Preparation of an alkene • Distillation • Unsaturation tests THEORY An acid-catalyzed dehydration is a common way to synthesize an alkene from an alcohol. Use of a strong acid like sulfuric or phosphoric acid serves to protonate the alcohol "OH" group‚ forming an H2O molecule that is a much better leaving group. As the water leaves the starting material‚ a proton is also lost in an elimination process. The end result is the alkene product. The chemical equation that describes
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precipitate‚ etc) 2) work in a short amount of time (instantly to 5 minutes) 3) only work with one functional group The following are chemical tests that we will use in this class. Some cover two related functional groups (such as the bromine test for alkenes and alkynes)‚ while other only a specific subcategory of that functional group (such as the iodoform test for methyl ketones). In some cases there can be false positives (compounds which do not have the functional group still give a result test)
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From the table‚ the result of dehydration of secondary alcohol is expected‚ and it undergoes E1 elimination. As supposed in the theory and mechanism‚ because elimination can occur both sides of secondary carbocation‚ so there are three products: 1-butene‚ trans-2-butene and cis-2-butene with three peaks. The main product is trans-2-butene‚ because it is the most stable compound. However‚ the result of dehydration of primary alcohol is not expected. It is supposed to form only one product‚ 1-butene
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