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What Are Ethers

Ether A compound containing an oxygen atom bonded to two carbon atoms. [Pg.260]

Dimethyi ether, CH3OCH3. (a) Lewis structure and (b) baii-and-stick modei. [Pg.260]

Potassium dichromate oxidation of ethanol to acetic acid is the basis for the original breath alcohol screening test used by law enforcement agencies to determine a person s blood alcohol content. The test is based on the difference in color between the dichromate ion (reddish orange) in the reagent and the chromium(lll) ion (green) in the product. Thus, color change can be used as a measure of the quantity of ethanol present in a breath sample  [Pg.260]

In its simplest form, a breath alcohol screening test consists of a sealed glass tube containing a potassium dichromate-sulfuric acid reagent impregnated on silica gel. To administer the test, the ends of the tube are broken off, a mouthpiece is fitted to one end, and the other end is inserted into the neck of a plastic bag. The person being tested then blows into the mouthpiece until the plastic bag is inflated. [Pg.260]

Glass tube containing potassium dichromate-sulfuric acid coated on silica gel particles [Pg.260]


What are available of proton and carbon data for compounds containing the 1,2,2,2-tetrafluoroethyl group are given in Scheme 6.7. Note that the vicinal F—H coupling constants for the sulfides are much greater than those of the analogous ethers. [Pg.193]

What are the hazards associated with the use of diethyl ether and what specific precautions are taken ... [Pg.36]

Within the phenoxypropanolamines, what are the basic structural requirements for cardiac (3-blocking activity Simply an appropriately substituted aminopropanol moiety linked through an ether oxygen to an aromatic system. Within these basic requirements there is enormous scope for structural variety. [Pg.5]

As is commonly known, what are called X-rays are produced when an electric discharge is passed through a high-vacuum tube. It has been shown that these rays are a series of irregular pulses in the ether, which are set up when the kathode particles strike the walls of the glass vacuum... [Pg.88]

Polycyclic ethers are biosynthesized by a variety of microorganisms. Several were clinical antibiotic candidates in the 1960 s and 1970 s. The discovery that such substances may have a wide distritution in the marine environment raises intriguing questions. Is the genetic capability of directing the biosynthesis of polycyclic ethers widely distributed What are the functions of these substances ... [Pg.71]

The odor of a freshly crushed mint leaf, like many plant odors, is due to the presence in the plant of volatile C10 and Ci5 compounds, which are called terpenes. Isolation of these substances from the various parts of plants, even from the wood in some cases, by steam distillation or ether extraction gives what are known as essential oils. These are widely used in perfumery, as food flavorings and medicines, and as solvents. Among the typical essential oils are those obtained from cloves, roses, lavender, citronella, eucalyptus, peppermint, camphor, sandalwood, cedar, and turpentine. Such substances are of interest to us here because, as was pointed out by Wallach in 1887 and reemphasized by Ruzicka in 1935, the components of the essential oils can be regarded as derived from isoprene ... [Pg.1462]

What are epoxides In what sense might they be regarded as ethers Is there any way that epoxides may be formed from other kinds of compounds in the body How might this occur ... [Pg.323]

Ethers are often used in applications where an unreactive organic solvent is required. In what sense are ethers unreactive How is this reflected in their toxicological chemistry ... [Pg.323]

Ethyl pentafluoroisopropenyl ether and one equivalent of sulfur trioxide give compound C5H5F504S, which on treatment with 2.5 equivalents of trifluoroacetic acid affords compounds C3HF504S and C4H5F302. What are the compounds shown, and how are they formed ... [Pg.12]

What are the alcohol structures and functional group isomers of diethyl ether, C4H10O or C2H5 O C2H5 ... [Pg.51]

Problem 17.3- (a) Upon treatment with sulfuric acid, a mixture of ethyl and n-propyl alcohols yields a mixture of three ethers. What are they (b) On the other hand, a mixture of /er/-butyl alcohol and ethyl alcohol gives a good yield of a single-ether. What ether is this likely to be How do you account for the good yield ... [Pg.554]

What are the meanings of simple and complicated ethers Explain with examples. [Pg.56]

What are the advantages of the inhalation anaesthetics isoflurane, desflurane and sevoflurane over the older ones ether, chloroform and halothane ... [Pg.251]

From the above discussion, it is reasonable to suppose that the C4HioC1+ ion produced in Reaction 6 may also have the dialkyl chloronium ion type structure. Such a process would be somewhat analogous to the formation of what are apparently protonated ethers in the reactions of protonated alcohol ions with alcohols (27, 37). The most recently published study of ion-molecule reactions in alcohols (19), however, indicates that the latter reaction in methanol actually occurs without loss of a water molecule and hence is different from Reaction 6, where HC1 is split off from the product ion. [Pg.416]

Uranyl nitrate containing 1 mol of boron per 100 mol of uranium is to be purified by fractional extraction with diethyl ether from a 10 N solution of ammonium nitrate. The extract is to contain no more than 1 mol of boron per million moles of uranium and is to contain 95 percent of the uranium in the feed. What are the minimum volumes of 10 N ammonium nitrate scrub solution and diethyl ether solvent needed per unit volume of feed ... [Pg.214]

How many ethers have the molecular formula C5H12O Give the structural formula and systematic name for each. What are their common names ... [Pg.108]

Now assume that Ry values for compounds A and D are measured on a second sample of alumina (adsorbent 2) 0.15 and 0.75. What are the Rj. values of compounds B, C, and E on adsorbent 2 (ethyl ether solvent in all cases) Equation (V-1) can be rearranged to give... [Pg.200]

Starks et al. [183] have addressed several questions regarding the mechanistic details of SLPTC, and those include what are the mechanisms of transport of anions from the solid phase to the organic phase, the mechanisms of formation of reactive ion pairs, the mechanisms of exchange of product anions located in the organic phase with reactant anions located in the solid phase, the effects of particle size on the rates of reaction, the mechanistic differences between quaternary cation and crown ethers as PT catalysts, and the mechanistic role of small quantities of water in SLPTC. Obviously, the behavior of the active ion pairs or catalytic intermediates is important in realizing the mechanism of SLPTC. [Pg.330]

The Claisen rearrangement of allyl 2,6-dimethylphenyl ether normally produces 4-allyl-2,6-dimethylphenol as the major product. When the reaction was carried out in molten maleic anhydride at 200°C, however, two products having the molecular formula C15H16O4 were isolated in addition to 4-allyl-2,6-dimethylphenol. What are the two compounds, and what does their isolation indicate about the mechanism of the reaction ... [Pg.782]


See other pages where What Are Ethers is mentioned: [Pg.239]    [Pg.260]    [Pg.261]    [Pg.263]    [Pg.273]    [Pg.239]    [Pg.260]    [Pg.261]    [Pg.263]    [Pg.273]    [Pg.206]    [Pg.11]    [Pg.182]    [Pg.305]    [Pg.1082]    [Pg.122]    [Pg.148]    [Pg.52]    [Pg.364]    [Pg.202]    [Pg.243]    [Pg.206]    [Pg.283]    [Pg.114]    [Pg.129]    [Pg.461]    [Pg.96]    [Pg.587]    [Pg.23]    [Pg.74]    [Pg.455]    [Pg.275]    [Pg.474]   


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