PPT-WORKING SAFELY WITH BENZENE

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. Aromaticity. TNT. 8-methyl-N-vanillyl-6-nonenamide (. Capsaicin). Buckminsterfullerene. Key points & objectives:. Aromatic molecules are cyclic, conjugated, flat, and unusually stable. 4n + 2 electrons (. (. Benzene. ). 140 pm. 140 pm. 140 pm. 140 pm. 140 pm. 140 pm. All C—C bond distances = 140 pm. Benzene. empirical formula. = CH. 140 pm. 140 pm. 140 pm. 140 pm. 140 pm. 140 pm. . 146 pm. 134 pm. Arenes are . aromatic hydrocarbons . containing 1 or more benzene rings. . A benzene ring is a ring of . 6 carbon atoms. , each of which is also bonded to a hydrogen atom, with molecular formula . C. By Taylor Hatchett. What is Benzene?. Chemical. C. olorless or light yellow. L. iquid at room temperature. Has a sweet odor . H. ighly flammable. E. vaporates quickly into air. What is Benzene?. Vapor is heavier than air. 15-4. The UV-visible spectrum of benzene reveals its electronic structure.. The energy gap between bonding and antibonding orbitals is greater in benzene than for acyclic trienes.. The UV spectra of benzene shows absorbances at smaller wavelengths (higher energy) than does the spectra of 1,3,5-hexatriene:. Orbitals. Natural gas?. Fig. 11.1. Aliphatic Hydrocarbon Structure Comparison. Bonding and Geometry. of Two-Carbon Molecules . 11.1 Structure and Physical. . Properties. Bitter almonds are the source of the aromatic compound benzaldehyde. Sources of Benzene. Some Facts About Benzene. Reacts mainly by substitution. Friedrich August Kekule’. The Orbital Model for Benzene. Why is working safely. important? . How do you work safely?. Follow safety instructions. Wash your hands. Wear . PPP. YOU MUST,. Why is working safely important?. Simply put,. PEOPLE DON’T GET HURT!. 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. . red Babies Report to the LegislatureFebruary 2017Legislative MandateThe Safely Surrendered Baby SSB law became operative January 1 2001 with the enactment of Senate Bill SB1368Brulte Chapter 824 Statu Objective. To know about . electrophilic. substitution reactions. Success criteria. Understand . the mechanism of the . electrophilic. substitution reactions of . benzene. Understand this for . halogenation. 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 . Learning Outcome 5: WORKING SAFELY AROUND PLANT AND EQUIPMENT. This learning outcome:. l. ists ways in which moving machinery can cause injuries. s. tates hazards of working with plant and equipment.