TAILIEUCHUNG - Lecture Organic chemistry: Chapter 15 - L. G. Wade, Jr.

Chapter 15 - Conjugated systems, orbital symmetry, and ultraviolet spectroscopy. In this chapter, we consider the unique properties of conjugated systems, the theoretical reasons for this extra stability, and some of the characteristic reactions of molecules containing conjugated double bonds. We also study ultraviolet spectroscopy, a tool for determining the structures of conjugated systems. | Chapter 15 Copyright © 2010 Pearson Education, Inc. Organic Chemistry, 7th Edition L. G. Wade, Jr. Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy Chapter 15 Conjugated Systems Conjugated double bonds are separated by one single bond. Isolated double bonds are separated by two or more single bonds. Conjugated double bonds are more stable than isolated ones. Chapter 15 Heat of Hydrogenation of Conjugated Bonds For conjugated double bonds, the heat of hydrogenation is less than the sum for the individual double bonds. The more stable the compound, the less heat released during hydrogenation, Conjugated double bonds have extra stability. Chapter 15 Relative Stabilities twice 1-pentene more substituted Chapter 15 Structure of 1,3-Butadiene Single bond is shorter than Å. Electrons are delocalized over molecule. There is a small amount of overlap across the central C—C bond, giving it a partial double bond character. Chapter 15

• Hoá học
• Organic chemistry
• Lecture Organic chemistry
• Hóa học hữu cơ
• Electronic Structure
• Conjugated system
• Orbital symmetry
• In this workbook
• experiments are elaborated using small scale glassware and equipments from a Small Lab Kit
• developed at the Department of Chemistry
• Faculty of Science
• Chulalongkorn University in Thailand
• This Small Lab Kit was created as a result of the research project entitled “Chemistry Laboratory Based on Chemical Safety and Pollution Minimization” sponsored by Thai Research Fund (RDG 3 07 2543)
• One of the outcomes of this project is the organic laboratory book entitled “Organic Chemistry Laboratory Based on Chemical Safety and Pollution Minimization” written in Thai by professors from 7 universities in this project
• They compiled
• adjusted and tested the experiments taken from several traditional organic chemistry laboratory books using the prototype of Small Lab Kit
• Currently
• some selected experiments from this Thai organic chemistry laboratory text have further been modified
• rewritten and edited in English as appeared in this workbook
• Some experiments ar
• Ebook Organic chemistry
• Nucleophilic substitution
• Determining organic structures
• nucleophilic addition
• Organic structures
• Electrophilic aromatic substitution
• Principles of organic chemistry
• Methods of organic chemistry
• The methane series
• The acetylene series
• Polybasic acids
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• Functional groups
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