PPT-The Structure of Benzene

Research Task Benzene research task Find out about and describe including diagrams Kekules structure for benzene C 6 H 6 Explain the discrepancies and limitations in the model with respect to the low reactivity . Aromatic compounds. Historical significance. Spices and herbs. Desire to synthesize. Deduced rather simple structure. Common. Benzaldehyde. Benzyl alcohol. T. oluene. Oxidation and further . rxn. yields the parent hydrocarbon. Environmental Health, Safety and Risk Management. University of Alaska Fairbanks. August 2011. 1. Overview. Properties and Sources of Benzene. Exposure Limits. Routes of Exposure and Health Effects. Protecting Yourself. Orbitals. Natural gas?. Fig. 11.1. Aliphatic Hydrocarbon Structure Comparison. Bonding and Geometry. of Two-Carbon Molecules . 11.1 Structure and Physical. . Properties. Chemistry 122/121. Cyclic Hydrocarbons. Both saturated and unsaturated hydrocarbons may be found in the form of a ring. The resulting structure has two less hydrogen than its straight chain counterpart. 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. Leon. María. Elena. Larissa. Vanillin. Information. History of benzene. Ring structure. Functional groups. Hückel’s. rule. Vanillin. History of benzene. The . empirical formula for benzene had been long known, but its highly unsaturated structure was a challenge to determine. . arene. : includes one or more ring of six carbon atoms with delocalised bonding.. All of the organic substances we have looked at so far have been aliphatic. Benzene belongs to the aromatic class. Benzene’s Structure. 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 . Bitter almonds are the source of the aromatic compound benzaldehyde. Sources of . Benzene. Benzene. , C. 6. H. 6. , is the . parent hydrocarbon . of the . especially stable . compounds known . as . Chemistry 122/121. Cyclic Hydrocarbons. Both saturated and unsaturated hydrocarbons may be found in the form of a ring. The resulting structure has two less hydrogen than its straight chain counterpart. 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. 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!. Objective. To know about . electrophilic. substitution reactions. Success criteria. Understand . the mechanism of the . electrophilic. substitution reactions of . benzene. Understand this for . halogenation.