PPT-Ethers

Unit 7 Ethers Ether organic compounds where two alkyl or aryl groups joined singly with an oxygen atom ROR ROAr ArOAr Ethers Symmetrical ethers 2 identical groups bonded to the oxygen. For more than 60 years these versatile products have played an important role in a host of applications from construction products ceramics and paints to foods cosmetics and pharmaceuticals For construction products cellulose ethers act as thickener CHEMISTRY Glycol ethers are produced by reacting one mole of an alcohol with one two or three moles of oxide ethylene or propylene The synthesis routes of two typical glycol ethers are shown below ESeries Example PSeries Example P Series Glycol Ethe Bergische Universit Thiols. , Phenols, . And Ethers. IUG, . Fall . 2013. Dr. . Tarek. . Zaida. 1. 1. Alcohols. Alcohols are derivatives of hydrocarbons in which 1 or more of the hydrogen atoms has been replaced by a hydroxyl (-OH) . 9-4. Organic esters are derivatives of carboxylic acids.. Inorganic esters are the analogous derivatives of inorganic acids.. Organic and Inorganic Esters from Alcohols. 9-4. Alcohols react with carboxylic acids to give organic esters.. Structure. Ethers have two organic groups (alkyl, aryl, or vinyl) bonded to the same oxygen . atom.. R groups are identical = symmetrical ether. R groups are different = unsymmetrical ether. Oxygen is . 9-11. Methanol:. Formed by catalytic reduction of CO and H. 2. at high temperatures and pressure.. Used as a solvent, a fuel for camp stoves and soldering torches, and as a synthetic intermediate.. Highly poisonous. May lead to blindness or death.. 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.. (R-OH) and (R-O-R). Members. Smita Jirayingcharoen (Mudmee). Pattraporn Kheerinpharadorn (BB). Sumanas Chamneandamrongkarn (Punpun). Vetaka Prajakchaikul (Ting-Ting). Sidaporn Muangsiri (Kaimod). Alcohol. Ether. Chemistry 11. Ms. McGrath. Ethers. General formula: Ethers are organic compounds that have two alkyl groups joined by an oxygen atom.. R-O-R’, where R and R’ are two alkyl groups (they can be the same or different). 45. -Alcohols . have the general formula R. -. OH and are characterized by the presence of a . hydroxyl group, . -. OH. . -Phenols . have a hydroxyl group attached directly to an aromatic ring. . -Thiols . Crown ether is molecules containing H,C & O atoms , each oxygen atom is bound between two of the C atoms and arranged in a ring . They are based on repeating (-OCH2CH2-) derived from ethylene glycol (HOCH2CH2OH). And. Developmental Toxicity. DIPHENYL ETHER HERBICIDES. Contact herbicides. Readily absorbed by roots, leaves. Limited translocation. Pre-emergence or early post-emergence. Uses. Control broadleaf weeds, grasses. Ethers and Their Relatives. An . ether. . has two organic groups (alkyl, aryl, or vinyl) bonded to the same oxygen atom, R–O–R. . Diethyl ether is used industrially as a solvent. Tetrahydrofuran (THF) is a solvent that is a cyclic ether .