Disulfides n-butyl disulfide

Dimethyl sulfate Dimethyl pyrosulfate Sulfoxonium salts Sulfonamides Disulfides, n-Butyl disulfide. Amyl -, Benzyl Phenyl -RSeSeR... 

When two or more mercaptans are simultaneously oxidized, a mixture of several disulfide products can be formed. Oxidation of mercapto-acetate and n-butyl mercaptan (BSH) yields three possible disulfides ASSA, ASSB, and BSSB. 

BUTYL-HEXADECYL-SULFIDE DECYL-SULFIDE ETHYL-OCTADECYL-SULFIDE HEPTADECYL-PROPYL-SULFIDE HETHYL-NONADECYL-SULFIDE 1-EICOSANETHIOL DECYL-DISULFIDE TRI-o-CRESYL PHOSPHATE 1-PHENYLPENTADECANE 1-CYCLOPENTYLHEXADECANE 1-CYCLOHEXYLPENTADECANE 1-PHENYLHEXADECANE 1-CYCLOHEXYLHEXADECANE n-BUTYL STEARATE DIISOOCTYL PHTHALATE DIOCTYL PHTHALATE DINONYLPHENOL TETRAPHENYLETHYLENE DIISODECYL PHTHALATE... 

Interestingly, if the tribromo compound is treated with five equivalents of n-BuLi, then tetralithiation occurs, as was shown by the isolation of an a-butyl-2,4,5-trimethylthio derivative after reaction with excess dimethyl-disulfide [87JCS(P1)1453]. The a-butyl group in the product is derived from reaction of the a-benzyl carbanion with the n-butyl bromide produced by the initial bromine-lithium exchange reaction (Scheme 59). However,... 

Distillation is required to remove the primary side-product, di-n-butyl disulfide. Purification by silica gel chromatography gave inferior results because of similar retention times of the two compounds. The initial distillate fractions are turbid, indicating the presence of di-n-butyl disulfide. The absence of turbidity in the higher boiling fractbn indicates distillate that is predominantly the desired n-butyl 4-chlorophenyl sulfide, containing only small amounts of n-butyl disulfide. 

Cross-linking is a predominant process during irradiation of siloxane polymers. Chain scissions are negligible. ° ° The cross-link density increases linearly with a dose up to 160 Mrad (1,600 kGy). ° At 5.0 MGy (500 Mrad) the G(X) value is 0.5. Free radical scavengers, such as n-butyl and frrf-dode-cyl mercaptan and diethyl disulfide, are the most effective antirads. ° - ° At a concentration of 10%, two-thirds of the cross-links were prevented from forming however, the scission yield was also increased. 

An example of method development using porous polymers is the work done for n-butyl mercaptan. n-Butyl mercaptan collected on charcoal was found to oxidize readily to the dibutyldisulfide. It was not feasible to analyze for the mercaptan as the disulfide, because the disulfide could also be present in the workplace. Silica gel was an excellent collector for the mercaptan in a dry atmosphere however, at 80% relative humidity the sorbent collected moisture preferentially, and sorbent capacity was severely reduced. 

Chronic moderate- to high-level exposure to some organic solvents, such as carbon disulfide, n-hexane and methyl n-butyl ketone, can cause encephalopathies (14), which have been variously described as organic solvent syndrome , painters syndrome , psycho-organic syndrome , and chronic solvent encephalopathy (15). 

Methyl mercaptan CH3SH, ethyl mercaptan CH3CH2SH, n-butyl mercaptan CH3(CH2)2CHSH, tetramethylthiuram disulfide C6H12N2S4 Bromine HBr, chlorine Cl, fluorine HF, hydrogen chloride HCl... 

An interesting example of a Lewis acid/base reaction between neutral reactants is the formation of tris(n-butyl)phosphonium-dithiocarboxylate, ( -Bu)3P" — 82 , from tris(n-butyl)phosphane and carbon disulfide in solution. As expected, this equilibrium is strongly shifted in favour of the dipolar zwitterion with increasing solvent polarity (diethyl ether dimethyl sulfoxide) [272, 273]. 

Another remarkable example of reaction type (c) in Table 5, somewhat related to the Menschutkin reaction, is the Sn2 reaction between tris(n-butyl)phosphane and carbon disulfide, to give zwitterionic tris( -butyl)phosphonium dithiocarboxylate via a corresponding dipolar activated complex [790, 791],... 

The reaction mixture is then added to 500 ml. of cold water which has been saturated with sodium chloride. Extraction with ether and distillation gives a little by-product di-n-butyl disulfide and 75 86g. (70-80%) of n-butyl 1-naphthyl sulfide, b.p. 115-I30°/1 mm. 

Benzylideneamino-2-mercaptothiazoles, from ct-aminonitrile, carbon disulfide and benzaldehyde, 286 2-Benzylthiazole, reaction with n-butyl-lithium, 379... 

Desulfurization with tri(n-butyl)phosphine converts both fc(S3) (or its /er/-butyl-substituted derivatives) [273, 274] and [Fe(C5H3)2](S3)2 (or its /er/-butyl-substituted analog) [272] to polymers in which the ferrocene units are linked through disulfide bridges (cf. Sect. 5.8),... 

Dimethyl sulfoxide oxidizes certain thlo ethers to the sulfoxides in reasonable yield. The ether is heated with a 50% molar excess of DMSO at 160-175° for several hours and the dimethyl sulfide is removed by distillation as formed. The suifoxides were isolated in high purity by distillation and there was no evidence of sulfone formation. Di-n-butyl sulfoxide and tetraethylene sulfoxide were obtained in similar yield, but several sulfides did not react to an appreciable extent. DMSO is a superior reagent for the oxidation of thiols to disulfides. A solution of the thiol in NHj MHj... 

The yield of HCl was 73% of theoretical. The di-n-butyl disulfide formed was isolated from the reaction mixture by distillation through a column with a yield of 83% of theoretical. By distillation from a Favorskii flask, the residue yielded 14.1 g (75%) of 1,1,7-trichloroheptane contaminated with a small amount of dibutyl disulfide. After redistillation, the 1,1,7-trichloroheptane was obtained in the pure state according to the results of GLC and analysis. 

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