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Dibenzyl disulfide

Included in the list of sulfides and mercaptans are diphenyl disulfide, dibenzyl disulfide, diamyl disulfide, bis(alkoxy aryl) disulfides, butyl mercaptan and thio-phenols, xylene thiols and other mercaptans, phenol sulfides and disulfides. ... [Pg.2691]

Synonyms a-(Benzyldithio)toluene Bis(phenylmethyl) disulfide Dibenzyl disulfide Di (phenylmethyl) disulfide Disulfide dibenzyl... [Pg.471]

Disulfide dibenzyl. See Benzyl disulfide Disulfide, diphenyl. See Phenyl disulfide Disulfide, di-2-propenyl. SeeAllyl disulfide Disulfide, ethyl methyl. See Diisopropyl disulfide... [Pg.1552]

Benzophenone Butyl acetyl ricinoleate Butyl laurate Butyl oleate Butyl stearate Butyl tallate Calcium stearate Castor (Ricinus communis) oil Coumarone/indene resin 2,2 -Dibenzamidodiphenyl disulfide Dibenzyl adipate Dibutoxyethoxyethyl adipate Dibutyl phthalate Dibutyl sebacate Didecyl phthalate... [Pg.5541]

Bacteria selected for growth with bis-(3-pentflnorophenylpropy)-sulfide as sulfur source are able to use dimethyl sulfoxide, dibenzyl snlfide, and some long-chain disulfides as sources of sulfur (van Hamme et al. 2004). Degradation takes place by oxidation to the sulfone, scission of the C-S bond to an alkanol, and an alkyl sulfinate that is degraded with loss of the snlfnr, which is nsed for growth. [Pg.578]

The anaerobic redaction of dimethyl snlfide to methane (Oremland et al. 1989), and of dibenzyl disulfide to toluenethiol and finally tolnene (Miller 1992) has been described. Methanomethylovorans hollandica is able to grow anaerobically with both dimethyl sulfide and methanethiol (Lomans et al. 1999) whereas dimethyl sulfide, which is used as an electron donor for the growth of Rhodobacter sulfidophilus, is converted into dimethyl sulfoxide (Hanlon et al. 1994). [Pg.578]

Digeranyl and dibenzyl disulfides 78 were lithiated under DTBB catalysis (5%) in THF at 0°C to yield to the corresponding organolithinm compounds. Reaction with electrophiles at —30 to 0°C and final hydrolysis afforded the expected prodncts 20 (Scheme 31) . [Pg.664]

Similar behavior of other aromatic disulfides and thiols on gold electrodes has been described based on the SERS experiments [167]. Adsorption of benzenethiol, benzenemethanethiol, p-cyanobenzenemethanethiol, diphenyl sulfide, and dibenzyl sulfide was studied on the roughened gold electrode. All these species adsorb dissociatively as the corresponding thiolates. Monolayers formed from symmetric disulfides were exactly like those formed from the corresponding thiols. These monolayers were stable in a wide potential window from -1-800 to —1000 mV (versus SCE), which was limited by the oxidation of the Au surface from the positive side and hydrogen evolution at —1000 to —1200 mV at the negative side. [Pg.862]

The method described is adapted from the procedures of Kym 3 and Engelhardt, Latschinoff, and Malyscheff.4 Thio-benzoic acid has been prepared by the reaction of benzoyl chloride with potassium sulfide,4 hydrogen sulfide in pyridine,6 6 and magnesium bromide hydrosulfide.7 It is formed from dibenzoyl disulfide with potassium hydrosulfide,4 potassium hydroxide,4 8 and ammonia.9 It is also formed from dibenzoyl sulfide, from phenyl benzoate, and from benzoic anhydride with alcoholic potassium hydrosulfide.4 It has been obtained from dibenzoyl sulfide and hydrogen sulfide,10 carbon oxysulfide and phenyl-magnesium bromide,11 12 dibenzyl disulfide and sodium ethoxide,13 benzyl chloride and sulfur in the presence of potassium hydroxide,14 and benzylthiosulfuric acid and alkali.18 16... [Pg.103]

The sulfonyl group is a key feature in the preparation of the unusually substituted dithiin sulfone (174) from dibenzyl sulfone. The acidic a-protons are abstracted with sodium hydride and the carbanionic intermediates react with carbon disulfide. The reaction is quenched with methyl iodide to give (174) in 17% yield (73BSF637). Another multisubstituted dithiin (175) is available from the reaction of diphenylthiirene dioxide with the ylide (176) (Scheme 21) but again the yield is low. However, the reaction is of particular interest in so far as the product mixture also contains a derivative of the rare oxathiin nucleus. Indeed of the three products isolated the oxathiin sulfone (177) is formed in marginally the highest yield (73BCJ667). [Pg.983]

Hydroxysulfenylation. Hydroxysulfenylation of cyclohexene is possible with diphenyl disulfide in CH2C12—TFA under air in the absence of a metal salt, but the reaction requires several days at 25°. With Pb(OAc)4 reaction occurs in 30 minutes at 0°. Actually Mn30(0Ac)7 is as efficient as Pb(OAc)4, particularly in reactions with dibenzyl disulfide. The trifluoroacetoxy sulfides can be converted into acetamido sulfides by reaction with acetonitrile containing cone. H2S04 (Ritter reaction, equation I).1... [Pg.156]

Manganese(III) acetate, 171 Manganese(III) acetate-Dibenzyl disulfide, 156... [Pg.410]

An interesting reaction has been reported by Glass and coworkers344 consisting of the attack of a selenium heterocycle, Ebselen oxide 66, by a-toluenethiol (equation 69). In this reaction thiobenzaldehyde has been invoked as intermediate and could be trapped with cyclopentadiene. In the absence of a diene, dibenzyl disulfide is isolated instead of... [Pg.1423]

Analytical surface techniques such as Auger Emission Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) analysis are extremely useful in identifying the chemistry of the solid surfaces (Buckley, 1981 Briggs and Seah, 1990). Table 5.7 is a summary of the XPS spectra data for rollering surfaces in oil containing dibenzyl disulfide under various conditions ... [Pg.176]

The chemical structure of mono- and disulfides has a distinct effect on performance. Tribochemical effectiveness of diphenyl DPDS and dibenzyl DBDS disulfides strongly depends on the decomposition products. The main products of thermal decomposition in a hydrocarbon solution are as follows (Plaza and Gruzinski, 1996 Plaza etal., 1994) ... [Pg.183]

Some thermally degraded byproducts react tribochemically with the friction iron surface to produce sulfide FeS. This is seen, for example, when elemental sulfur reacts tribochemically with the rubbing surface however, much greater quantities of elemental sulfur release are seen from dibenzyl DBDS than diphenyl DPDS disulfide, thus qualifying DPDS as a better lubrication performer (Plaza, 1987c and 1989 Plaza at al., 1997, 1999 and 2000). [Pg.183]

Tribochemical reactions of dibenzyl disulfide in the presence of a second additive (e.g., ZDDP, chlorinated paraffin, amines, phenol, barium alkylbenzylsulfonate, and polyisobutenylsuccinimide) were investigated (Plaza, 1989). All the systems tested reduced the concentration of elemental sulfur in the oil to low loads. Formation of FeS was reduced in the presence of chlorinated paraffin, barium alkylbenzylsulfonate, ZDDP, and polyisobutenylsuccinimide. The amines and hindered phenol had little or no effect on iron sulfide formation at higher loads. [Pg.185]

Antioxidant additives DBPC = 2,6-di-tert-butyl-p-cresol, B = alkyl-diphenyl amine Extreme-pressure additives DBDS = dibenzyl disulfide (C6H5-CH2-S-S-CH2-C6H5 ), DPDS = diphenyl disulfide (C6H5-S-S-C6H5) ... [Pg.186]

Organic sulfide Extreme pressure (EP) additives, eg., dibenzyl disulfide, diphenyl sulfide. [Pg.310]

The hydrogenolysis of sulfones and sulfonic acids over MoS3 requires higher temperatures (300-375°C) than for thiols, sulfides, or disulfides, except with dibenzyl sulfone, where hydrogenolysis to give toluene proceeded at 200-250°C. / -Tolu-... [Pg.620]


See other pages where Dibenzyl disulfide is mentioned: [Pg.143]    [Pg.183]    [Pg.103]    [Pg.189]    [Pg.105]    [Pg.627]    [Pg.143]    [Pg.183]    [Pg.103]    [Pg.189]    [Pg.105]    [Pg.627]    [Pg.192]    [Pg.178]    [Pg.1035]    [Pg.176]    [Pg.742]    [Pg.109]    [Pg.1526]    [Pg.420]    [Pg.93]    [Pg.183]    [Pg.227]    [Pg.19]    [Pg.172]    [Pg.176]    [Pg.186]    [Pg.206]    [Pg.280]    [Pg.114]    [Pg.619]    [Pg.101]   
See also in sourсe #XX -- [ Pg.7 , Pg.58 , Pg.138 , Pg.140 , Pg.143 ]




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Dibenzyl disulfide, cleavage

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