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Potassium methyl xanthate

Bla methoxy(thiocaibonyl)] disulfide, (CH3OCS)2 (I). Mol. wt. 214.34, m.p. 23.5°. The disulfide is prepared by reaction of potassium methyl xanthate, CH3OCSS, with chloramine-T at 25°.1... [Pg.39]

The corresponding 9,1 l-dioxa-10-thiahomoprostanoid 263 was synthesized by reaction of the diol 258 with thionyl chloride. When the reaction with thionyl-chloride was carried out with the erythro diol 264 the isomeric 9,1 l-dioxa-10-thiahomoprostanoid 265 with cis side chains was obtained. The 9,11-dithiahomo-prostanoid 267 was prepared by reaction of the epoxide 266 with potassium methyl xanthate. [Pg.88]

Potassium methylsulfinylmethylide, 329 Potassium methyl xanthate, 39 Potassium nitrite, 329 Potassium nitrosodisuifonate, 329-330 Potassium nonaflate, 441... [Pg.265]

Another route to intermediate trithiocarbonates is the reaction of cis- and trans-1,2-cpoxides with potassium methyl xanthate to give, with Walden inversion, trans-or cis-1,2-trithiocarbonates, respectively. [Pg.224]

Epithio compounds are obteuned from epoxides by reaction with sulphur-containing compounds such as thiourea, thiocyanogen, thiocyanates, potassium methyl xanthate and base, or 3-methylbenzothiazol-2-one and trifluoroacetic acid. 9,10-Epithiostearic acid melts at 58 °C (cis) and 64 °C (trans). Sulphur-containing compounds can also be made by radical addition (usually photolytic) of hydrogen... [Pg.474]

Table 8 summarizes domestic consumption by use for amyl alcohols. About 55% of the total 1-pentanol and 2-methyl-1-butanol production is used for zinc diamyldithiophosphate lubrication oil additives (150) as important corrosion inhibitors and antiwear additives. Amyl xanthate salts are useful as frothers in the flotation of metal ores because of their low water solubiUty and miscibility with phenoHcs and natural oils. Potassium amyl xanthate, a collector in flotation of copper, lead, and zinc ores, is no longer produced in the United States, but imports from Germany and Yugoslavia were 910 —1100 t in 1989 (150). [Pg.376]

When exposed to ait, the sodium salts tend to take up moisture and form dihydrates. The alkah metal xanthates are soluble ia water, alcohols, the lower ketones, pyridine, and acetonitrile. They are not particularly soluble ia nonpolar solvents, eg, ether or ligroin. The solubiUties of a number of these salts are Hsted ia Table 4. Potassium isopropyl xanthate is soluble ia acetone to ca 6 wt %, whereas the corresponding methyl, ethyl, / -propyl, n-huty isobutyl, isoamyl, and benzyl [2720-79-8] xanthates are soluble to more than 10 wt % (12). The solubiUties of the commercially available xanthates ia water are plotted versus temperature ia Figure 1 (14). [Pg.361]

Potassium 4-chloro-3,5-dinitrobenzene-sulfonate, 31, 46 Potassium cyanate, 31, 9 Potassium cyanide, 30, 84 32, 31, 63 Potassium ethyl xanthate, 30, 56 Potassium hydroxide, 30, 103 Potassium iodide, 30, 34 31, 31, 66 Potassium methyl sulfate, 31, 73... [Pg.57]

Potassium 4-chloro-3,5-dinitrobenzene-sulfonate, 31, 46 Potassium cyanate, 31, 9 Potassium cyanide, 30,84 32,31,63 37,47 Potassium ethyl malonate, 37, 34 Potassium ethyl xanthate, 30, 56 Potassium fluoride, 36, 40 Potassium iodide, 30, 34 31, 31, 66 Potassium metal, 37, 29, 30 Potassium methyl sulfate, 31, 73 Potassium nitrate, 31, 46 Potassium 1-nitropropylnitronate, 37, 24 Potassium oxalate, 34, 83 Potassium permanganate, 30, 87 31, 59 Potassium sulfide, 32, 103 Potassium thiobenzoate, 32, 101 Potassium thiocyanate, 32, 39, 40 Prins reaction, 33, 72 Propane, 1, 3-dibromo-2, 2-Ws-(bromo-methyl)-, 31, 82... [Pg.53]

A very elegant, simple, versatile and high yielding synthesis of fused l,3-dithiol-2-ones has been described recently. In a representative example, treatment of 4-benzoyloxy-l-bromo-2-butyne with potassium O-methyl xanthate in methanol gave the expected xanthate ester in excellent yield. Refluxing of this ester in chlorobenzene for one hour in the presence of dimethyl fumarate gave 1 in quantitative yield. [Pg.121]

The first structure to be described is of the potassium salt of the methyl-xanthate anion (11), isolated in anhydrous form and with three independent KS2COMe entities comprising the crystallographic asymmetric unit the presence of three independent anions was also observed in a subsequent solid-state 13C NMR study (12). The molecular structure of the S2COMe anion is... [Pg.131]

The potassium xanthate salts of some tertiary alcohols on pyrolysis yield alkenes. The overall yield in this case is often markedly better than those obtained from the corresponding 5-methyl xanthates (the classical Chugaev procedure). [Pg.156]

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]

The replacement of an amino group by a mercapto group on an aromatic nucleus is effected by treating the diazotized amine with potassium ethyl xanthate and hydrolyzing the resulting aryl ethyl xanthate (Leuckart). Yields of 40-80% are reported for thiophenols containing methyl, halo, and methoxyl groups. Potassium ethyl xanthate is readily prepared from alcoholic potassium hydroxide and carbon disulfide. ... [Pg.841]

Potassium ethyl xanthate, 837 Potassium ferricyanide, 409,9J9-933,1239 Potassium fluoride, 375, 933-935 Potassium hydride in oil, 935 Potassium hydrosulfide, 935 Potassium hydroxide, 935-937 Potassium hydroxide-Acetone, 938 Potassium hypochlorite, 488, 938 Potassium manganate, 938-939 Potassium 2-methyl-2-butoxide, 574, 905, 939-940... [Pg.725]

Although other xanthates have been used, methyl xanthates (R3 = Me) are by far the most commonly employed in the Chugaev elimination. For the preparation of the xanthate, a variety of bases have been used including sodium hydride, sodium hydroxide, sodium amide, and sodium/potassium metal. In the case of pure chiral alcohol stereoisomers, epimerisation of the alcohol stereocentre, under the basic conditions, can occur (with the corresponding xanthates leading to different products). Purification of the xanthate, prior to pyrolysis, is often a problem and it is usual to pyrolyze the crude xanthate directly. Pyrolysis of the xanthate is often carried out by distillation. Depending on the pyrolysis temperature, pressure, and the boiling point of the olefin, the product will either distill with the other products (COS, thiol) or remain in the reaction flask. [Pg.334]

Carbonic acid, dithio-, o-s-butyl ester, sodium salt. See Sodium s-butyl xanthate Carbonic acid, dithio-, cyclic S,S-(6-methyl-2,3-quinoxalinediyl) ester. See Chinomethionat Carbonic acid, dithio-, 0-isopropyl ester, potassium salt. See Potassium isopropyl xanthate... [Pg.767]

Pentyl xanthic acid, potassium salt. See Potassium amyl xanthate m-Pentynol. See Methyl pentynol Pentyoxypentane. See Diamyl ether... [Pg.3251]

Dimercury dichloride Etridiazole Furalaxyl Hexachlorophene Metalaxyl Methasulfocarb Methyl isothiocyanate Paraformaldehyde Pentachloronitrobenzene fungicide, soil treatment Copper potassium sulfide 3,5-Dimethyl tetrahydro-2-H,1,3,5-thiadiazone-2-thione Potassium ethyl xanthate fungicide, soil-borne diseases Tolclofos-methyl... [Pg.5342]

Hexyl neopentanoate Hydroxypropyl-a-cyclodextrin Hydroxypropyl-p-cyclodextrin Hydroxypropyl-y-cyclodextrin lodofenphos Isooctane Isosafrole Lindane Malaoxon Maleic anhydride Methanesulfonic acid Methyl isothiocyanate Nicotine N-Nitrosodiethanolamine N-Nitrosodimethylamine 2,2 -Oxybis (4,4,6-trimethyl)-1,3,2-dioxaborinane Parathion-methyl PEG-3 dimethyl ether Pennyroyal (Hedeoma pulegiodes) oil n-Pentane Perchloropentacyclodecane Potassium amyl xanthate Potassium n-butyl xanthate... [Pg.5514]


See other pages where Potassium methyl xanthate is mentioned: [Pg.404]    [Pg.404]    [Pg.231]    [Pg.1095]    [Pg.150]    [Pg.99]    [Pg.114]    [Pg.114]    [Pg.523]    [Pg.128]    [Pg.349]    [Pg.350]    [Pg.9]    [Pg.531]   
See also in sourсe #XX -- [ Pg.39 ]

See also in sourсe #XX -- [ Pg.404 ]

See also in sourсe #XX -- [ Pg.440 ]




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