PPT-Alkenes and Alkynes continued

Preparation of alkenes Preparation of alkenes continued Dehydration of alcohols The H and OH are removed from adjacent carbons Eg ethanol may be heated with sulphuric acid to create ethene. Objectives. Rules. Unsaturated. Alkenes. I certainly learnt to call ethylene . ethene. and propylene . propene. (see slide 1). Molecular formula. Alkanes. C. n. H. 2n+2. Alkenes. C. n. H. 2n. Alkynes?. Alkanes, alkenes, alkynes and aromatics. Types of Hydrocarbons. Hydrocarbons contain C and H. There are 4 families, alk. anes. only have C-C single bonds, alk. enes. have at least one C=C and alk. ynes. Alkynes. Alkynes are molecules that incorporate a C. C triple bond. Alkynes. Given the presence of two pi bonds and their associated electron density, alkynes are similar to alkenes in their ability to act as a nucleophile. And Their Halogen Derivatives. IUG, Fall 2012. Dr . Tarek. . Zaida. Alkenes and Alkynes. 1. . Alkenes. are compounds containing carbon –carbon double bonds. The simplest . alkene. , . ethene. , is a plant hormone.. Alkenes and Alkynes I:. Properties and Synthesis.. Elimination Reactions. of Alkyl Halides. Copyright © 2014 by John Wiley & Sons, Inc. All rights reserved.. About The Authors. . These PowerPoint Lecture Slides were created and prepared by Professor William Tam and his wife, Dr. Phillis Chang. . In a reaction catalyzed by mercuric ion, water can be added to alkynes to give enols, which then tautomerize to give ketones.. Hydration follows Markovnikov’s rule—terminal alkynes give methyl ketones:. Straight chain alkanes will have symmetrical . electronegativities. so they will behave as non-polar molecules. Since ‘like dissolves like’ the alkanes will all be soluble in . eachother. However… since water is polar; alkanes will NOT dissolve in water… think of pouring oil on water. . and alkyne . Reactions, continued. Dr. Clower. CHEM 2411. Spring 2014. McMurry. (8. th. ed.) sections 7.7-7.8, 7.10-7.11, 10.3-10.4, 8.2-8.8, 8.10, 8.12, 9.3-9.8, 7.1, 8.1, 9.2, 9.9 . Reactions of Alkynes. Newehy. Chemistry Department, College of Science, King Saud University. http://fac.ksu.edu.sa/melnewehy. Unsaturated Hydrocarbons. Alkynes. - . Alkynes. are . ydrocarbons. . that contain a . carbon–carbon . Division of Material. Alkenes and Alkynes are very versatile molecules in Organic Chemistry. As a result, there is a lot of information we need for them. . To make it manageable, the information is divided into two chapters.. Aldehyde C-H Activation. Hua Wu (. Jieping. Zhu’s Lab). Laboratory. of . Synthesis. and Natural . Products. (. LSPN. ). Ecole Polytechnique Fédérale . de . Lausanne (. EPFL. ). 1. Group Seminar. Unsaturated Hydrocarbons. Unsaturated hydrocarbon. :. . contains one or more carbon-carbon double or triple bonds. alkene. :. . contains a carbon-carbon double bond and has the general formula C. n. Third . Edition. David Klein. Copyright © 2017 John Wiley & Sons, Inc. All rights reserved.. Klein, Organic Chemistry 3e . 10.1 Alkynes. Alkynes are molecules that possess a C. C triple bond. Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display.. Acetaldehyde – of commercial importance. . - oxidation to acetic acid. . - dehydration to acetic anhydride.