Ethylene glycol 1,2-ethanediol

Ethylene glycol 1,2-Ethanediol 95 CoHeOo 1,2-Propylene glycol 1,2-Propanediol 96 C,HsOj... 

Diols that bear two hydroxyl groups in a 1,2 or 1,3 relationship to each other yield cyclic acetals on reaction with either aldehydes or ketones. The five-membered cyclic acetals derived from ethylene glycol (1,2-ethanediol) are the most commonly encountered examples. Often the position of equilibrium is made more favorable by removing the water fomned in the reaction by azeotropic distillation with benzene or toluene ... 

The most generally useful polyester is that made by reaction between dimethyl terephthalate (dimethyl 1,4-benzenedicarboxylate) and ethylene glycol (1,2-ethanediol). The product is used under the trade name Dacron to make clothing fiber and tire cord and under the name Mylar to make recording tape. The tensile strength of polyethylene terephthalate) film is nearly equal to that of steel. 

Write the condensed structural formulas of the principal products of the reaction that takes place when (a) ethylene glycol, 1,2-ethanediol, is heated with stearic acid, CH,(CH2)i6COOH (b) ethanol is heated with oxalic acid, HOOCCOOH (c) 1-butanol is heated with propanoic acid. 

Ethylene glycol (1,2-ethanediol) is added to automobile radiators to prevent cooling water from freezing. Estimate the freezing point of coolant that contains 2.00 kg of ethylene glycol and 5.00 L of water. 

GLYCOL. A dihydric alcohol (i.e.. a compound conlaining two alcoholic hydroxy] groups). The chemical properties are represented by those of the simplest members of the class, ethylene glycol, 1,2-ethanediol. CH-OH CHjOH. which is a colorless, viscous liquid, of sweetish taste. Odorless, boiling point I97°C. miscible in all proportions with water or alcohol, slightly soluble in ether. Like ethyl alcohol, ethylene glycol is often called by the class name. 

Some solvents are reluctant to crystallize before turning into a glass, including allyl alcohol (2-propen-l-ol), ethylene glycol (1,2-ethanediol), and hexylene glycol (2-methyl-pentane-2,4-diol). Some common solvents may be liquid below their freezing points if they contain impurities, in particular small amounts of water. Thus, /-butyl alcohol (2-methyl-2-propanol), acetic acid, and phenol can appear liquid at or below ambient temperatures (i.e., < Tm) due to this cause. 

Aldehydes and ketones are usually protected by converting them to acetals by reaction with an alcohol in the presence of acid (see Section 18.9). Although many different alcohols could be used, ethylene glycol (1,2-ethanediol) or 1,3-propanediol is most often... 

Set up the equations required for solution of Example 15.13 by the method of equilibrium constants. Verify that your equations yield the same equilibrium compositions as given in the example. 1541 Ethylene oxide as a vapor and water as liquid, both at 25°C and 10133 kPa, react to form an aqueous solution of ethylene glycol (1,2-ethanediol) at the same conditions ... 

Ethylene Glycol 1,2-Ethanediol (ethylene glycol) is the simplest analog of a sugar that captures at least some of its critical features, namely, the possibility of intramolecular hydrogen bonding. Even a molecule as small as... 

Ethylene Glycol 1,2-ethanediol 62.07 Solvent/cosolvent increases... 

Close to half of the ethylene oxide produced is directly converted to ethylene glycol (1,2-ethanediol) by acid-catalyzed or pressure hydration. Roughly half the ethylene glycol is as an automotive coolant antifreeze and half in polyester (poly(ethylene terephthalate)) fiber production (Chap. 21). Smaller amounts are consumed for alkyd resins production and for the formulation of latex paints. 

Methanol is a toxic alcohol that is used as a solvent. Ethanol is the alcohol consumed in beer, wine, and distilled liquors. Isopropanol is used as a disinfectant. Ethylene glycol (1,2-ethanediol) is used as antifreeze, and glycerol (1,2,3-propanetriol) is used in cosmetics and pharmaceuticals. 

K and ethylene glycol (1,2-ethanediol) that has a boiling point of 470.5 K. Also compare the estimates of using and not using the measured boiling points. 

Ethylene glycol (1,2-ethanediol) EG 107-21-1 glycol ethylene alcohol... 

Which determinative technique to use is dictated by the physical and chemical nature of the analyte of interest. The organics protocol flowchart introduced in Chapter 2 serves as a useful guide. Let us consider how we would determine which instrumental technique to use for the following example. Ethylene glycol, 1,2-ethanediol (EG), and 1,2-dichloroethane (1,2-DCA) consist of molecules that contain a two-carbon backbone with either a hydroxyl- or chlorine-terminal functional group. The molecular structures for these are as follows ... 

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