1,2-Ethanediol . See

Ethanediol. See Ethylene glycol Ethanoic acid. See Acetic acid Ethanol, 128, 130, 580-581 acidity of, 135, 740-741 and benzaldehyde, acetal from, 669 biological oxidation of, 600—602 chemical shifts, 606 conversion to diethyl ether, 592 dehydration of, 182 dipole moment of, 130, 863 by fermentation, 580-581 hydrogen bonding in, 130-131 industrial preparation of, 223, 581 physical properties of, 130, 132-133, 580 reduction of aryl diazonium salts by, 894, 907... 

Dodecanoic acid, ester with 1,2-ethanediol. See Glycol laurate SE... 

Examine space-filling models for the two conformers and identify any likely unfavorable nonbonded interactions. Based on steric effects, which conformer would you anticipate would be the more stable Compare energies of anti-1,2-ethanediol and gauche-1,2-ethanediol to see if you are correct. Is this the same ordering of conformer energies as seen for n-butane (see Chapter 5, Problem 3)7... 

Display electrostatic potential maps for both anti and gauche conformers of 1,2-ethanediol. Do you see any examples of destabilizing interactions (between like charges) or stabilizing interactions (between unlike charges) in either conformer Are you able to explain the observed conformational preference ... 

In spite of a rather surprising overall reaction order of 6 (see Sect. 6.1.2.2) and of E values noticeably above those generally found, Ueberreiter and Hager19 reported some interesting variations of E in the early stages of the reaction of 1,2-ethanediol with the following dicarboxylic acids ... 

Adipic acid, 219.2 g (1.5 mol), and 77.6 g (1.25 mol) of 1,2-ethanediol are weighed into a 500-mL glass reactor equipped with a mechanical stirrer, a nitrogen inlet, and a distillation head connected to a condenser and a receiver fiask. The reactor is placed in a salt bath preheated at 180°C and the temperature is dien raised gradually to 220°C (see note at end of procedure) until the greater part of water has been removed (3 h). The reactor is cooled down to 160°C and vacuum is applied slowly to ca. 0.07 mbar (30 min). Temperature is ramped to 220°C (see note below) at a rate of l°C/min and reaction is continued for an additional 90 min. At the end of reaction, the carboxylic acid endgroup content is close to 1.90 mol/kg. No purification of final polyester is carried out. 

Ethanediol dipropanoate, see Crotonaldehyde Ethanedionic acid, see Oxalic acid... 

Ethanediol monoformate, see 1,4-Dioxane Ethanesulfonic acid see Ethyl sulfide Ethanethiol, see Parathion, Phorate Ethanol, see Bromoform, Butane, 1-Butene,... 

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... 

Dioxins, 1,4-oxathiins, and 1,4-dithiins are commonly prepared by elimination reactions from saturated analogues (see Section 4.3.4.1.4). A convenient synthesis of 2,3-dihydro-1,4-dioxins (e.g., 442) starts from propargyl chloride and 1,2-ethanediol (Scheme 206) . Another approach to substituted 2,3-dihydro-... 

Ethanediol undergoes reaction at 380° with trimethylborane, to give 2-methyl-l,3,2-dioxaborolane34 (14), presumably by way of the intermediate dimethylborinate (13) (see Scheme 2), and Russian workers unexpectedly encountered an analogous reaction during... 

ETHANEDIOL DIACETATE see EJD759 ETHANEDIOL DINITRATE see EJGOOO... 

ETHANEDIOL DIPROPANOATE (9CI) see COB260 ETHANEDIONE, DIPHENYL-, MONOOXIME see BCA300... 

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