Dimethoxyethane: Ethane, 1,2-dimethoxy

Tin(IV) chloride Tin chloride (8) Stannane, tetrachloro- (9) (7646-78-8) Bromotris[3-(2-methoxyethoxy)propyl]stannane 2,5,13,16-Tetraoxa-9-stannaheptadecane, 9-bromo-9-[3-(2-methoxyethoxy)propyl]- (12) (130691-02-0) Dimethoxyethane Ethane, 1,2-dimethoxy- (8,9) (110-71-4)... 

Hirao et al. (1978a,b) have reported similar results. The rate of reaction of sodium phenoxide with 1-bromobutane was 88 times faster in dimethoxy-ethane than in dioxan. The presence of 0.135 M dibenzo-18-crown-6 [11] in dioxan completely levelled out the difference with dimethoxyethane. It is... 

In an Erlenmeyer flask capped with a rubber septum a mixture of naphthalene, 1,2-dimethoxy-ethane and enough sodium to yield an 0.5-1.0 m solution of anion radical is stirred with a glass-covered stirring bar for 1-1.5 hours, by which time the anion radical will have formed and scavenged the oxygen inside the flask. A solution of one-sixth to one-third of an equivalent of the sulfonamide in dimethoxyethane is injected by syringe and the mixture is stirred at room temperature for approximately 1 hour. Quenching with water produces amines in 68-94% isolated yields. 

Sufficient ethanol should be present to provide a homogeneous solution at the boiling point. Due to the appreciable solubility of the dibromo(l,2-dimethoxy-ethane)nickel in ethanol-1,2-dimethoxyethane mixtures, the yield of the salmon-pink complex will be lower if enough ethanol-ethyl formate is not volatilized. 

In another experiment we tested the utility of 1,2-dimethoxyethane as a solvent for the reaction. The results obtained in this experiment revealed that the coal polyanion was formed to the same extent as in tetrahydrofuran. In addition, the alkylation of the polyanion with butyl mesylate gave the same quantity of soluble product in 1,2-dimethoxy-ethane as it did in tetrahydrofuran. Hence both solvents are equally useful for the alkylation reaction. 

C.44) Ethane, 1,1-dimethoxy-, 1,1-dimethoxyethane, acetaldehyde dimethyl acetal [534-15-6] FEMA 3426 Identified by Reymond et al. (1963). 

Beilstein Handbook Reference) Acetaldehyde dimethyl acetal Acetaldehyde methyl acetal AI3-24137 BRN 1697039 1,1-Dimethoxyethane Dimethyl acetal Dimethyl aldehyde EINECS 208-589-8 Ethane, 1,1-dimethoxy- Ethylidene dimethyl ether FEMA No. 3426 HSDB 5427 Methyl formyl UN2377. Liquid mp = -113.2° bp = 64.5° d O = 0.8501 Xm = 290 nm soluble in... 

SODIUM-ETHER COMPLEX. During the early experimental work the reducing agent was thought to be an active sodium-ether complex (13) y which appeared to form when dispersed sodium was added to commercial-grade 1,2-dimethoxy ethane. When a sodium dispersion was added to the latter material, a white flocculent precipitate formed which exhibited properties similar to metallic sodium in that it reacted with alcohols and water with liberation of hydrogen gas, yet apparently reverted to sodium metal when isolated from the excess ether. The precipitate could not be isolated for chemical analysis, and for lack of a better name the material was termed the sodium-ether complex. The material appeared to reduce ferric chloride readily and most of the earlier runs were carried out in 1,2-dimethoxyethane medium. 

Both the solvent and gegen ion have a pronounced influence on the rates of anionic polymerizations. The polymerization rate generally increases with increasing polarity of the solvent for example, = 2.0 dm mol s for the anionic polymerization of styrene in benzene, but = 3800 dm mol s whm the solvent is 1,2-dimethoxy-ethane. Unfoitunately, the dielectric constant is not a useful guide to polarity or solvating power in these systems, ask = 550 dm mol s when the solvent is changed to THF, whose dielectric constant e is higher than e for 1,2-dimethoxyethane. 

Dimethoxyethane (Ethylene Glycol Dimethyl Ether or Monoglyme). Because it is miscible with water, 1,2-dimethoxyethane is a useful alternative to solvents such as dioxane and tetrahydrofuran, which may be more hazardous. 1,2-Dimethoxy-ethane is flammable and should not be handled near an open flame. On long exposure of 1,2-dimethoxyethane to light and oxygen, explosive peroxides may form. 

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