PPT-Phenols What is phenol? Phenols

Objective To know what phenol is Success criteria Recognise phenol compounds Recall the reaction of phenol with bromine water Compare the reactions of phenols to that of bromine Explain the difference in reactivity between phenols and benzene. by South Magnetic Field Exposure. Jongtai. Jung. (Professor/Ph. D). Major of Environmental Engineering. Division of Urban and Environmental Engineering. University of . Incheon. To determine . - . and how to identify them. 2. Classification. Primary. : carbon with –OH is bonded to one other carbon. Secondary. : carbon with –OH is bonded to two other carbons. Tertiary. : carbon with –OH is bonded to three other carbons. 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. Ar. -OH). Phenols . are compounds of the general formula . Ar. -OH, where . Ar. - is phenyl, substituted phenyl, or one of the other aryl groups. . I. Structure . and nomenclature:. Phenols . differ from alcohols in having the -OH group attached directly to an aromatic . Alcohol . – alkyl chain attached to an –OH. . R-OH. Phenol . - aromatic attached to an –OH. Nomenclature. 1. Name the longest chain of carbons which includes the carbon with the hydroxyl group.. Uses Course. Dr. Mohamed Abdel-Fattah. A. Professor of Immunology & Biotechnology . Teacher Home Page. : http://uqu.edu.sa/staff/ar/4320553. Extraction of DNA. Why purify genomic DNA?. Because Many . applications require purified . PHENOLS. Alcohols and Phenols. Alcohols contain an OH group connected to a . a. saturated C (sp. 3. ). They are important solvents and synthesis intermediates. Phenols contain an OH group connected to a carbon in a benzene ring. In a phenol the OH group is directly attached to the benzene ring. . In a phenol the lone pair of electrons on the oxygen is delocalised with the electron charge cloud of the . arene. ring. . The delocalised bonding changes the reactivity of the OH group and the . Understand reasons for the relative ease of bromination of phenol compared with benzene. What reagents and conditions are required for the bromination of benzene?. Catalyst (Halogen carrier). Heated. Chapter . 13. Alcohols, Phenols, . Thiols. , and Ethers. Anesthesia is typically administered by a nurse anesthetist who provides care before, during, and after a medical procedure. A nurse anesthetist gives medications to keep a patient asleep and pain-free while monitoring the patient’s vital signs. Received: August 8, 2009 Accepted: October 13, 2009 O A Ehsani et al. Iranian Journal of Dermatology, Vol 12, No 3, Autumn 2009 75exclusive ablation of lateral horn matrix (without excision of par activation of C-H bonds of . phenols. . catalyzed. by . copper. -amine complexes. Mebrouka. . Dekhici,. a,b. Didier . Villemin. a. *, Nawel . Cheikh. b,c. , Nathalie Bar. a. a . Laboratoire de Chimie Moléculaire et . Dr.Baqer A. Al-Mayyahi. 1. Phenolic Resin. Introduction. Phenolic resins are obtained by the reaction of phenols with aldehydes. Both parent compounds, phenol and formaldehyde, are by far the most important components in commercial phenolic resin production .