PPT-Chapter 18 Reactions of Aromatic molecules

Benzene is aromatic a cyclic conjugated compound with 6 electrons Reactions of benzene lead to the retention of the aromatic core Types of Reactions Electrophilic substitution Diazonium. Most common reactions for aromatics involve replacement of ring . hydrogens. by other atoms or groups . (substitution reactions). Mechanism of Electrophilic Aromatic Substitution Reactions. Electrophile. Dr. . Shatha. I . Alaqeel. 108 . Chem. Learning Objectives. By the end of chapter four the students will:. Understand the resonance description of structure of benzene. Understand the hybridization in benzene. 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 . Dr. Sheppard, CHEM 4201, Fall 2014. Heterocyclic Chemistry. The chemistry of . heterocycles. Formation. Reactions. Applications. Several examples already seen this semester. Atom Identification. Numbers. 1435-1436. 2014-2015. Learning Objectives. . Understand the. . resonance description of structure of benzene. Understand the hybridization in benzene. Understand the relation between the stability of benzene and resonance energy. 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). Islamic University in . Madinah. Department of Chemistry. Prepared By. Dr. Khalid Ahmad Shadid. Chemistry department – Islamic university in . madinah. . 1. cracking. Crude oil is separated into its different components by a process called . 240 . Chem. 1. The expressing . aromatic compounds . came to mean . benzene. . and derivatives of benzene. .. . Structure of Benzene: Resonance Description. C. 6. H. 6. It contains a six-membered ring and three additional degrees of unsaturation.. MICHAEL FARADAY (1791-1867). first person to isolate and identify benzene. early benzene uses:. - . decaffeinate . coffee. - antiknock additive . in gasoline. - solvent in chem rxns. now we know benzene is a carcinogen!. Changes or transforms chemicals into . other. chemicals. Ex: Iron + Oxygen . . Iron Oxide (rust). Physical Science Review. What is the product?. What are the reactants?. Chemical formula. . shows the kind and proportion of atoms of each element that occurs in a particular compound. 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 . Reactions involving the ring. A. Reduction. a. Catalytic hydrogenation (Chapter 11.4). b. Birch reduction (Chapter 11.11). B. . Electrophilic. aromatic substitution (Chapter 12). C. . Nucleophilic. Dr. Geeta Singh. Assistant Professor. Department of Chemistry. D.D.U. Gorakhpur University, Gorakhpur. Introduction. Key . terms.. General reaction for aromatic electrophilic substitution.. Common reactions of AES.. 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 .