Ethyl butyl sulphide

Many applications of Kilpatrick and Pitzer s procedure for calculating thermodynamic properties of molecules with compound rotation have been reported. In all cases possible potential energy cross-terms between rotating tops have been neglected. Contributions from internal rotation of symmetric tops have been calculated using the appropriate tables." These tables have also been used in calculations for the internal rotation of asymmetric tops hindered by a simple -fold cosine potential. 3-Fold potential barriers have been assumed in calculations for the —OH rotations in propanol and 1-methylpropanol, the —SH rotations in propane-1-thiol, butane-2-thiol, 2-methylpropane-l-thiol, and 2-methylbutane-2-thiol, the C—S skeletal rotations in ethyl methyl sulphide, diethyl sulphide, isopropyl methyl sulphide, and t-butyl methyl sulphide, and the C—C skeletal rotations in 2,3-dimethylbutane, and 2-methylpropane-l-thiol. 2-Fold cosine potential barriers have been assumed in calculations in the S—S skeletal rotations in dimethyl disulphide and diethyl disulphide. ... 

Ando et at, found the photochemical reaction to be the most useful method to date for the preparation of sulphoniumcyclopentadienylides (7) from diazocyclopentadiene and a variety of dialkyl sulphides. Reaction with di-t-butyl sulphide afforded a mixture of sulphides, which probably resulted from rearrangements of an initially formed ylide (8). With allyl ethyl sulphide, diazocyclopentadiene gave a 13% yield of the addition product (9) and a 31% yield of a product (10) resulting from initial ylide formation... 

The curing acceleration effect of bis(dialkyl) thiophosphoryl sulphide (DaPDS) are investigated. The order of acceleration effect is ethyl, butyl, 2-ethylhexyl. Ethyl and butyl derivatives indicate the function of a sulphur donor. It is assumed that the active species is the zinc salt of each DaPDS. In contrast with the conventional curing system, curing of the DaPDS/S curing system is activated by silica. Physical properties of silica-filled vulcanisates are superior to those of conventional curing systems. 4 refs. 

The influence of copper ion on the flotation of zinc-iron sulphide minerals in the presence of depressant with butyl xanthate l.Ox 10 mol/L as a collector is presented in Fig. 6.11 to Fig. 6.14. It can be seen from Fig. 6.11 and Fig. 6.12 that in the presence of 120 mg/L 2-hydroxyl ethyl dithio carbonic sodium (GXl) and 2,3 dihydroxyl propyl dithio carbonic sodium (GX2), marmatite is activated by copper ion and exhibits very good flotation with a recovery above 90% in the pH range of 4-8. The flotation of arsenopyrite and pyrrhotite is poor with a... 

Reductive hydrolysis of n-butyl nitrate in an aqueous solution of ethyl alcohol in the presence of sodium hydrosulphide or ammonium hydrosulphide has been carried out by Merrow, Cristol and van Dolah [41], This is a complicated chemical reaction. As the result of hydrolysing the nitrate in the presence of sodium hydro-sulphide (the alkalinity of the solution corresponds to pH 10-11) 93% of nitrite ions and 7% of ammonia are obtained from the ester group nitrogen. When ammonium hydrosulphide is used, the nitrite ions initially produced rise to a maximum concentration and then fall to zero owing to the reducing action of the ammonium hydrosulphide. The reduction process takes place more effectively when the pH is above 10. 

This product melts at 15° C., boils at 171° C. at 4 mm. and has a density of 1 4724 at 25° C. Replacement of the sulphide by / j8 -dichlorodiethyl sulphone or sulphoxide yields respectively di-p-ethylselenolethyl sulphone9 S02(CH2.CH2.SeC2H5)2, M.pt. 72 5° C., and the corresponding sulphoxide, SO(CH2.CH2.SeC2H5)2, an oil, decomposing on distillation at 4 mm. Condensation of sodium ethyl selenide with sodium anthraquinone-1-n-butylsulphone-5-sulphonate similarly yields 5-ethylselenol-l-n-butyl-sulphone anihraquinone, which does not melt below 300° C. ... 

The optically active arsinous acid esters 128-134 and the arsinthious acid ester 135 have been used to prepare optically active tertiary arsines (Table 7). When the arsine sulphide 136 was heated in benzene with n-butyl or -propyl bromide, ethyl bromide was eliminated and there was a reversal in the sign of the rotation, which was attributed to the formation of the inverted n-butyl and n-propyl esters of (p-carboxyphenyl)phenyl-arsinthious acid, 137a and 137b, respectively (equation 18) . 

Natural gas has no distinctive odour (except for very sour gases), and for safety reasons, pipeline companies and utilities commonly odorise the gas either as the gas enters the transmission system, or within local distribution zones. Various odorants may be used, the most common being mixtures of thiophenes and mercaptans. Tefiahydrothiophene (THT) is widely used throughout Europe and in the US (as Pennwall s odorant), whereas in the UK a cocktail of compounds is used comprising ethyl mercaptan, tertiary butyl mercaptan, and diethyl sulphide. 

Formation.—A convenient and rapid synthesis of thiirans (yields 35— 90%) consists of treatment of epoxides with triphenyl- or tri-n-butyl-phosphine sulphide in the presence of acid. cis-Stilbene oxide gave exclusively cis-stilbene sulphide. (S)-(-)-Methylphenyl-n-propylphosphine sulphide gave, with a twofold excess of cyclohexene oxide, the (S)-(-)-oxide, indicating that this reaction proceeds with retention of configuration at phosphorus. " A mechanism involving two inversions was suggested for the conversion of 2a,3a-epoxycholestane into the 2, 3 3-epithio-isomer, as shown in Scheme 1. Epithiochlorohydrin is obtained by treatment of epichlorohydrin with di-(0-ethyl)dithiophosphoric acid and triethylamine. "... 

Synthesis.— The condensation of acetonitrile with ethyl thionoformate by means of butyl-lithium has been reported to yield thioformylacetonitrile (1) after subsequent treatment of the intermediate lithium salt (2) with hydrochloric acid. The thioaldehyde could not be isolated, but it was reasonably stable in solution in the tautomeric enethiol form (3), and was characterized as its stable S-methyl derivative (4). Several new, stable thioaldehydes, (5) and (6), have been synthesized by solvolysis of the VUsmeier salts (7) and (8) with aqueous sodium hydrogen sulphide. Some deuteriated analogues of (6) were similarly prepared from the corresponding salts (9). The thioaldehydes (10) were isolated as amorphous solids from the cycloaddition reaction of l,2-dithiole-3-thione with propiolic acid or its... 

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