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Carbon oxy sulfide

Zielinski, E. Use of argon ionisation detector with <3Ni source for chromatographic determination of hydrogen sulphide, sulfur dioxide and carbon oxy-sulfide. Chem. Anal. 14, 521 (1969). - Z. Anal. Chem. 254, 378 (1971). [Pg.46]

Fig. 4.14. The Chugaev reaction for the dehydration of alcohols. (The decomposition of dithiocarbonic acid methylester—here given in brackets—to form carbon oxy-sulfide and methane thiol is outlined in Section 8.1 near Figure 8.4.)... Fig. 4.14. The Chugaev reaction for the dehydration of alcohols. (The decomposition of dithiocarbonic acid methylester—here given in brackets—to form carbon oxy-sulfide and methane thiol is outlined in Section 8.1 near Figure 8.4.)...
Carbon disulfide captan, dazomet, dithianon, EXD, ferbam, folpet, hexythiazox, isoprothioiane, mancozeb, maneb, metam, methidathion, nabam, propineb, tebuthiuron, thicyofen, thiram, zineb, ziram Carbon monoxide fenuron Carbon oxy sulfide see carbonyl sulfide Carbon tetrabromide deltamethrin, tralomethrin Carbon tetrachloride cypermethrin, permethrin, tridiphane... [Pg.1028]

Thermal decomposition of methyl xanthates is similar to the pyrolysis of acetates for the formation of the double bond. Olefins are obtained from primary, secondary, and tertiary alcohols without extensive isomerization or structural rearrangement. The other products of the pyrolysis of the methyl xanthates are methyl mercaptan and carbon oxy-sulfide. The xanthates prepared from primary alcohols are more difficult to decompose than those prepared from secondary and tertiary alcohols. Over-all yields of 22-51% have been obtained for a number of tertiary alkyl derivatives of ethylene. Originally the xanthates were made by successive treatment of the alcohol with sodium or potassium, carbon disulfide, and methyl iodide. In a modification of this procedure sodium... [Pg.26]

There are different fashions how to induce water removal in condensation reactions. By simply heating amino acids with or without potent agents of condensations such as hydrogen cyanide, HC=N, cyan amide, N=C-NH2, and carbon-oxy-sulfide COS, oligomers and polymers, called proteinoids, readily formed. The detection of enzymatic activities in these polymeric proteinoids was unsuccessful except for about ten degrading enzymatic activities. Synthetic activities that build up molecules, for instance, kinase, ligase, and polymerase, were not detectable. The disadvantage of these mixtures of proteinoids is that they do not exhibit a distinct structure or a function. [Pg.42]

Dithiazine (86) gives the j -thiolactam (87) after concerted thermal elimination of carbon oxy-sulfide followed by further rearrangement of the ensuing 1,3-thiazetidine (Scheme 4) <84CB2205>. [Pg.841]

These chiral allylic cyclic carbonates are also capable of reacting with carbon, oxygen, or sulfur nucleophiles to provide products whose regio- and diastereoselectivities depend on the nature of the nucleophile. The reaction of 551 with phenol in the presence of palladium(O) and triethylamine provides in 79% yield 555, whereas similar reaction with sodium benzene-sulfinate furnishes the ( )-allylic alcohol 556 in 80% yield. However, sodium thiophenoxide, under conditions that do not lead to catalyst poisoning, attacks proximal to the oxygen atom with inversion to afford the threo-P-hy oxy sulfide 557 in 74% yield. This reaction is not observed in the absence of a palladium catalyst [181] (Scheme 123). [Pg.404]

The nervous system is vulnerable to attack from several directions. Neurons do not divide, and, therefore, death of a neuron always causes a permanent loss of a cell. The brain has a high demand for oxy gen. Lack of oxygen (hypoxia) rapidly causes brain damage. This manifests itself both on neurons and oligodendroglial cells. Anoxic brain damage may result from acute carbon monoxide, cyanide, and hydrogen sulfide poisonings. Carbon monoxide may also be formed in situ in the metabolism of dichloromethylene. [Pg.292]

Bismuth may be obtained from other ores, too. The recovery process however, depends primarily on the chemical nature of the ores. For example, the sulfide ore requires smelting, carbon reduction, and the addition of iron (to decompose any bismuth sulfide present). Oxide ores, on the other hand, are treated with hydrochloric acid to leach bismuth from the mineral. The bismuth chloride solution is then diluted with water to precipitate bismuth oxy-... [Pg.108]

The aqueous fluids formed by melting of ices in asteroids reacted with minerals to produce a host of secondary phases. Laboratory studies provide information on the identities of these phases. They include hydrated minerals such as serpentines and clays, as well as a variety of carbonates, sulfates, oxides, sulfides, halides, and oxy-hydroxides, some of which are pictured in Figure 12.15. The alteration minerals in carbonaceous chondrites have been discussed extensively in the literature (Zolensky and McSween, 1988 Buseck and Hua, 1993 Brearley, 2004) and were most recently reviewed by Brearley (2006). In the case of Cl chondrites, the alteration is pervasive and almost no unaltered minerals remain. CM chondrites contain mixtures of heavily altered and partially altered materials. In CR2 and CV3oxb chondrites, matrix minerals have been moderately altered and chondrules show some effects of aqueous alteration. For other chondrite groups such as CO and LL3.0-3.1, the alteration is subtle and secondary minerals are uncommon. In some CV chondrites, a later thermal metamorphic overprint has dehydrated serpentine to form olivine. [Pg.433]

Table 3.8 lists the arsenic concentrations of different types of marine and estuary sediments from various locations. Overall, low organic-carbon carbonate muds, oxidizing sands, and coarser-grained sediments have relatively little arsenic. In contrast, reducing marine sediments may contain as much as 3000 mg kg-1 of arsenic (Mandal and Suzuki, 2002), 202. Arsenic also tends to be enriched in fine-grained silicate-rich sediments, such as deep-sea clays and marine muds. In most cases, arsenic-rich sediments contain abundant arsenic-accumulating (oxy)(hydr)oxides, organic matter, or sulfides. [Pg.122]

Sedimentary rocks with the highest arsenic concentrations largely consist of materials that readily sorb or contain arsenic, such as organic matter, iron (oxy)(hydr)oxides, clay minerals, and sulfide compounds. Arsenian pyrite and arsenic-sorbing organic matter are especially common in coals and shales. Ironstones and iron formations are mainly composed of hematite and other iron (oxy)(hydr)oxides that readily sorb or coprecipitate arsenic. Iron compounds also occur as cements in some sandstones. Although almost any type of sedimentary rock could contain arsenic-rich minerals precipitated by subsurface fluids (Section 3.6.4), many sandstones and carbonates consist almost entirely of minerals that by themselves retain very little arsenic namely, quartz in sandstones and dolomite and calcite in limestones. [Pg.180]

The temperature and density structure of the troposphere, along with the concentrations of major constituents, are well documented and altitude profiles have been measured over a wide range of seasons and latitudes for the minor species water, carbon dioxide, and ozone. A few profiles are available for carbon monoxide, nitrous oxide, methane, and molecular hydrogen, while only surface or low-altitude measurements have been made for nitric oxide, nitrogen dioxide, ammonia, sulfur dioxide, hydrogen sulfide, and nonmethane hydrocarbons. No direct measurements of nitric acid and formaldehyde are available, though indirect information does exist. The concentrations of a number of other important species, such as peroxides and oxy and peroxy radicals, have never been determined. Therefore, while considerable information concerning trace constituent concentrations is available, the picture is far from complete. [Pg.373]

The Sg2 reaction on the 5p -like hybridized carbanion tends to proceed with inversion of the stereochemistry [45]. It is reasonable that a-thio carbanions, having higher s character than a-oxy carbanions, more frequently invert the stereochemistry on the anionic carbon in the reaction with electrophiles. As in the case of a-lithiated benzyl 2-pyridyl sulfide, the reaction of a-lithiated benzyl 2-quinolyl sulfide also proceeds through a dynamic thermodynamic resolution pathway. The quinolyl group is an excellent protecting group of thiols [46] and can be removed to yield the corresponding chiral thiols without racemization (Tables) [47]. [Pg.192]


See other pages where Carbon oxy sulfide is mentioned: [Pg.179]    [Pg.179]    [Pg.179]    [Pg.104]    [Pg.179]    [Pg.69]    [Pg.2837]    [Pg.179]    [Pg.179]    [Pg.179]    [Pg.104]    [Pg.179]    [Pg.69]    [Pg.2837]    [Pg.539]    [Pg.286]    [Pg.539]    [Pg.9]    [Pg.290]    [Pg.152]    [Pg.41]    [Pg.50]    [Pg.41]    [Pg.3]    [Pg.85]    [Pg.100]    [Pg.149]    [Pg.160]    [Pg.278]    [Pg.379]    [Pg.91]    [Pg.194]    [Pg.194]    [Pg.104]    [Pg.3442]    [Pg.91]    [Pg.372]    [Pg.3287]    [Pg.191]    [Pg.769]    [Pg.211]   
See also in sourсe #XX -- [ Pg.36 ]

See also in sourсe #XX -- [ Pg.36 ]




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