PPT-CHEMISTRY OF PHENOLS Ms.

J Princess Gracia M Sc MPhil Assistant Professor Department of Chemistry Bon Secours College for Women Thanjavur Introduction Phenols also called as phenolics are a class of chemical compounds consisting of a hydroxyl group OH bonded directly to an aromatic hydrocarbon group. YX = 0 1 o 2 = 1 2 o 3 henol, styrenated (96- O -- cresol) OHp US EPA, Office of Pollution Prevention and Toxics. Development of Chemical Categories, Chemical RightKnow Initiative. ht Keri Brophy-Martinez. Automation. History of Automation. 1957. Technicon. develops the first automated analyzer. Continuous flow. Issues: carryover and costly. 1970. Dr Anderson(NASA) develops a centrifugal analyzer. Thiols. , . and ethers. Nomencalture. of alcohols. Use the end . ol. Examples. . Hydrogen bonding in alcohols and phenols. Alcohols and phenols form hydrogen bonds, and hence they have relatively high boiling points. This also makes the lower alcohols miscible with water. As the R group becomes larger, the solubility of alcohols in water decreases dramatically.. 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. 1. Hydration of Alkenes - . addition of water. - uses H. 2. SO. 4. and heat. Ex.; Hydrate propene.. 2. Hydrogenation of Aldehydes & Ketones –. All . carbon-carbon double bonds in the molecule will be hydrogenated at the same time. Chemistry 1411. Fall 2012-2013. Ms. . Nida. . Jamil. Zakia. . AlAsaad. 201100622. Zainab. . AlHashim. 201001479. Ohood. . AlGuryafi. 200901235. Aminah. . AlRastem. 200800733. Chemistry has been aro. 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 . 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. Edition. Chapter. 3. Acids and Bases. David Klein. Copyright © 2017 John Wiley & Sons, Inc. All rights reserved. . Klein, Organic Chemistry 3e . 3.1 . Bronsted. -Lowry Acids . and Bases. Brønsted-Lowry definition. • What is “Inorganic Chemistry”?. . - descriptor or professional subfield. . - same as “General Chemistry”?. • Highlights from the inorganic timeline. . - Lavoisier: origin of modern chemistry. Phenols are organic compounds with a hydroxyl group attached directly to an aromatic ring. They have the general formula . Ar. -OH. Examples of them include phenol, hydroquinone, resorcinol,. o. -cresol, . Jamshedpur Cooperative College Jamshedpur. B. Sc. (. Chem. . Hons. ) Semester III. Outline. Nomenclature. Structure. Synthesis. Physical and Chemical Properties. Nomenclature. Phenols . are defined as compounds having hydroxyl group attached directly to a benzene nucleus. Its general formula is . 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. Methanol, CH. Lecturer . Luma. . Amer. Department of . Pharmaceutical Chemistry. /Collage of pharmacy . 2 . ed. . stage.. Identification of Phenols. phenols are stronger acids than water and. will dissolve in 5% .