The first system to crack the problem earns a set amount of ether or bitcoin. In exchange for supplying computing power, miners obtained rewards in the form of ether tokens when they validated transactions. Many reliable companies offer this service and all a user has to do is sign up on the website and create an account. By the process of mining, you lend the processing power of your mining rig to verify the transactions. The miners who have already established themselves broadly in recent months and years and could therefore incur lower losses can profit here.
Ethers def
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Also found in: Dictionary , Thesaurus , Encyclopedia. All rights reserved. Any organic compound in which two carbon atoms are independently linked to a common oxygen atom, thus containing the group -C-O-C-. See also: epoxy. Loosely used to refer to diethyl ether or an anesthetic ether, although a large number of ethers have anesthetic properties. For individual ethers, see the specific name. Any of a class of organic compounds in which two hydrocarbon groups are linked by an oxygen atom.
A volatile, highly flammable liquid, C4H10O, derived from distilling ethyl alcohol with sulfuric acid, used as a reagent and solvent, and formerly used as an anesthetic. Also called diethyl ether, ethyl ether. The regions of space beyond the earth's atmosphere; the heavens. The reaction is accelerated by light, metal catalysts, and aldehydes. In addition to avoiding storage conditions likely to form peroxides, it is recommended, when an ether is used as a solvent, not to distill it to dryness, as any peroxides that may have formed, being less volatile than the original ether, will become concentrated in the last few drops of liquid.
The presence of peroxide in old samples of ethers may be detected by shaking them with freshly prepared solution of a ferrous sulfate followed by addition of KSCN. Appearance of blood red color indicates presence of peroxides.
The dangerous properties of ether peroxides are the reason that diethyl ether and other peroxide forming ethers like tetrahydrofuran THF or ethylene glycol dimethyl ether 1,2-dimethoxyethane are avoided in industrial processes. Lewis bases[ edit ] Structure of VCl3 thf 3. For instance, diethyl ether forms a complex with boron trifluoride , i.
Ethers also coordinate to the Mg center in Grignard reagents. Tetrahydrofuran is more basic than acyclic ethers. It forms complexes with many metal halides. Alpha-halogenation[ edit ] This reactivity is similar to the tendency of ethers with alpha hydrogen atoms to form peroxides. Reaction with chlorine produces alpha-chloroethers.
Synthesis[ edit ] Ethers can be prepared by numerous routes. In general alkyl ethers form more readily than aryl ethers, with the later species often requiring metal catalysts. The reaction is catalyzed by acids, usually sulfuric acid. The method is effective for generating symmetrical ethers, but not unsymmetrical ethers, since either OH can be protonated, which would give a mixture of products.
Diethyl ether is produced from ethanol by this method. Cyclic ethers are readily generated by this approach. Several milder methods exist to produce ethers. It involves treatment of a parent alcohol with a strong base to form the alkoxide, followed by addition of an appropriate aliphatic compound bearing a suitable leaving group R—X.
Suitable leaving groups X include iodide , bromide , or sulfonates. This method usually does not work well for aryl halides e.
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