PPT-Aromatic Electrophilic Substitution Reactions

Dr Geeta Singh Assistant Professor Department of Chemistry DDU Gorakhpur University Gorakhpur Introduction Key terms General reaction for aromatic electrophilic substitution Common reactions of AES. 15-8. Benzene undergoes substitution reactions with electrophiles.. Electrophiles attack benzene by substituting for a hydrogen atom, not addition to the ring.. Under the conditions of this type of reaction, ordinary non-aromatic conjugated polyenes would polymerize rapidly.. In addition to substitution, alkyl halides can also undergo elimination reactions, which lead to the formation of alkenes.. As with substitution reactions, elimination reactions come in two mechanistic types:. 16-6. Naphthalene is activated toward electrophilic substitution.. Naphthalene undergoes electrophilic substitution rather than addition.. Naphthalene is activated with respect to electrophilic aromatic substitution. Bromination at C1 occurs without a catalyst under mild conditions.. of Alkenes: Addition Reactions. Disparlure: sex attractant of the female gypsy moth.. (A type of . pheromone.. ). 2. I. Hydrogenation of Alkenes. Addition. Reactions. oleic acid. (unsaturated). stearic acid. Newehy. Chemistry Department, College of Science, King Saud University. http://fac.ksu.edu.sa/melnewehy. Aromatic . Compounds. The Structure of Benzene Ring. - . Benzene. is . the . parent hydrocarbon of . . as a tool for structure determination. Experimental:. Dissolve the sample in DCM (1 mL). Add . dropwise. a 1% . bromine solution. of DCM. Positive test, if red color disappears . Conclusion:. The sample contains a multiple bond, which undergoes . Reactions of Arenes. Reactions involving the ring. A. Reduction. a. Catalytic hydrogenation (Chapter 11.4). b. Birch reduction (Chapter 11.11). B. . Electrophilic. aromatic substitution (Chapter 12). 1. Nomenclature . of Polycyclic Aromatic Compounds. Polycyclic . aromatic compounds have two or more benzene rings fused together. 2. Naphthalene, anthracene and phenanthrene are obtained from . coal tar. Fall . 2018. Schedule of . day. PPE . and Pre-lab check . – at the door. Quiz. Recitation. Safety. Put bags away. Goggles. Gloves. Lab Coat. Lab part 1. IR . Review. Lab part 2. Due . Dates. . Today. Organic Chemistry Chemical reactions part 1 Alkanes – c hemical reactions Combustion Free radical substitution Complete combustion In excess oxygen, short chain alkanes can undergo complete combustion 282 Benzene and Its Derivatives What Is the Structure of Benzene? What Is Aromaticity?How Are Benzene Compounds Named, and What Are Their Physical Properties?What Is the Benzylic Position, and How D UNIT I : Benzene & its derivatives. PART -I. Electrophilic Aromatic . Substitution Reactions. Aromatic compounds (Benzene) . undergo electrophilic aromatic substitution (. EAS).. Arene . (. Ar. -H) is the generic term for an aromatic . Objective. To know about . electrophilic. substitution reactions. Success criteria. Understand . the mechanism of the . electrophilic. substitution reactions of . benzene. Understand this for . halogenation. D. r. . Zamir G Khan . Assistant Professor . H R Patel Institute of Pharmaceutical Education and Research Shirpur, Dist. Dhule, (M.S) 425405. Copyright @ Mr. Z G Khan. 2. If benzene is 1,3,5-cyclohexatriene as .