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. And 57375en 57375ere Were None meets the standard for Range of Reading and Level of Text Complexity for grade 8 Its structure pacing and universal appeal make it an appropriate reading choice for reluctant readers 57375e book also o57373ers students 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.. Orbitals. Natural gas?. Fig. 11.1. Aliphatic Hydrocarbon Structure Comparison. Bonding and Geometry. of Two-Carbon Molecules . 11.1 Structure and Physical. . Properties. 15-5. Molecules containing several fused benzene rings are called . polycyclic benzenoid. or . polycyclic aromatic hydrocarbons. (. PAHs. ).. Common names are used for these systems, since there is no simple naming system for them.. 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. 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 . Synthesis reactions. Decomposition reactions. Single replacement reactions. Double replacement reactions. (Precipitate reaction). Chemical Reactions can be written as:. Word equation. Chemical equation. 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. 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!. 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 . Assistant lect. Nora . Zawar. Assistant lect. . Zeina. Dawood. Assistant . lect. . Zahraa. . Amer. . Simple Solution. Solutions. : are liquid pharmaceutical preparations. Which contain one or more soluble chemical substance dissolved in one or more suitable solvent and produce single-phase system. The Discovery of Benzene. Benzene was discovered in . 1825. by the English chemist . Michael Faraday . (Royal Institution). Faraday called this new hydrocarbon “. bicarburet. of hydrogen”.. Faraday isolated benzene from a compressed illuminating gas that had been made by . Arenium Ion Mechanism . Some Aromatic Electrophilic Substitution Reactions Viz. Nitration, Sulphonation, Halogenation, Friedel- Crafts Reaction. Orientation & Reactivity in Mono Substituted Benzene. 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 .