Disulfides diphenyl

Diphenyl-1,3-butadiene, 40, 36 Diphenylcarbodiimide, 43,31 Diphenyl disulfide, set Phenyl disulfide Diphenyl ketimine, 44, 51 Diphenylmethylenimine, 44, 51 oe,j8-DlPHENYLPROPIONIC ACID, 40, 38 Dipotassium l, 8-naphthalenedicarbox-... 

The lO-E-4 chalcogen(IV) species diphenylselenium(IV) dibromide (1, Fig. 1) and diphenyltellurium(IV) dibromide (2, Fig. 1) oxidize thiophenol to diphenyl disulfide in nearly quantitative yield as shown in equations (13) and (14). Tellurium(IV) dihalides 6-11 also oxidize thiophenol to diphenyl disulfide and benzene selenol to diphenyl diselenide. Similarly, the 12-Te-5 molecule dioxatellurapentalene 45 (Fig. 19) is a mild oxidant for ethylmercaptan, thiophenol, and benzene selenol giving diethyl disulfide, diphenyl disulfide, and diphenyl diselenide in essentially quantitative yield. As shown in equation (15), 1,1,5,5,9,9-hexachloro-1,5,9-tritelluracyclododecane oxidizes six molecules of thiophenol to diphenyl disulfide and 1,5,9-tritelluracyclododecane in 90% yield. In contrast, 12-Te-5 pertellurane 44 and 12-Se-5 perselenane 46 do not oxidize thiophenol to diphenyl disulfide. Instead, these molecules undergo a nucleophilic addition of thiophenol followed by cleavage of the tellurium-carbon or selenium-carbon bond. ... 

Organic sulfide Extreme pressure (EP) additives, eg., dibenzyl disulfide, diphenyl sulfide. 

Ricinelaldic acid 9-0ctadecenoic acid, 12-hydroxy-, TR-(E)]- (9) (540-12-5) Ricinolic acid 9-0ctadecenoic acid, 12-hydroxy-, [R-(Z)]- (9) (141-22-0) Diphenyl disulfide Phenyl disulfide (8) Disulfide, diphenyl (9) (882-33-7) 2,2 -Dipyridy 1 disulfide Pyridine, 2,2 -dithiodi - (8) Pyridine, 2,2 -... 

Diphenyl disulfide Phenyl disulfide (8) Disulfide, diphenyl (9) (882-33-7)... 

Cyclopropylidenetriphenylphosphorane (1) generated by treatment of cyclopropyltriphenyl-phosphonium tetrafluoroborate (4) with lithium diisopropylamide, reacts with dialkyl disulfides (diphenyl disulfide does not react) or 7V-(phenylsulfanyl)succinimide in tetrahydrofuran to afford [1 -alkylsulfanyl(cyclopropyl]triphenylphosphonium tetrafluoroborates (5). The latter are useful three-carbon synthons, suitable for pentannulation reactions, as demonstrated with enolates of 2-methoxycarbonyl-4-methylcyclohept-4-enone and -0x0 esters. ... 

Highly strained systems sueh as bicyelobutane (14) and [1.1. l]propellane (15) readily underwent addition of bromotrichloromethane across the central bond by a radical mechanism. Benzoyl peroxide eatalyzed a number of addition reactions to the extremely strained central bond of [l.l.l]propellane (15). Examples were acetaldehyde, cyanogen bromide, deuteriochloroform, diphenyl disulfide, diphenyl diselenide, iodine, and tert-butyl hypochlorite.Radical chain addition of various organic disulfides to [l.l.ljpropellanes (15), initiated by 2,2 -azobis(iso-butyronitrile) gave the normal adducts across the strained central bond and homologs that contained two or more bicyclo[l.l.l]pentane moieties. 

Anderson patented the reclaiming of sulfur vulcanized rubber in the presence of oil, water vapor, and a mixture of aryl disulfides (diphenyl disulfide, dicresyl disulfide, and dixylyl disulfide) at elevated temperature and pressure. " ... 

The reaction of diethyl 1-lithio-l, 1-difluoromethylphosphonate with diphenyl disulfide, diphenyl diselenide, or phenylselenyl chloride affords diethyl 1-(phenylsulfenyl)- and l-(phenylselenyl)-... 

Sakurai, Ikeda and Okabe [60, 61] studied the effect of load, among other factors, on the thickness of the interaction films generated by the following substances tagged with S elemental sulfur, dibenzyl disulfide, diphenyl disulfide, n-dodecyl mercaptan. The equilibrium thickness of the interaction film generated by rubbing increased with applied load and was also governed by the chemical nature of the additive substance, as is discussed further in Chapter 14,... 

Figure 14-7 is an example of the course of lubricated wear as followed by surface radioactivity. The progressive accumulation of reaction product on the rubbing track in the presence of a tagged compounded lubricant is shown by the first part of the curve, and the fact that this is the net resultant of simultaneous reaction and wear processes is demonstrated by the shape of the final portion of the curve, Sakurai it at. [11, 12, 13] found such behavior to be characteristic of the following sulfur compounds, singly and in combination sulfur, dibenzyl disulfide, diphenyl disulfide, dodecyl mercaptan and also these sulfur compounds in combination with stearic acid, benzyl chloride, chlorobenzene or hexachloroethane, The qualitative observations are credible enough, but because of experimental difficulties and the complications noted... 

Similarly, thioselenation of olefins can be achieved with the diphenyl disulfide/ diphenyl diselenide binary system [26] (Eq. 9). The radical chain addition of disulfides to olefins is quite inefficient because of the competition of yff-elimination with the attack of the /S-thioalkyl radical on the disulfide diphenyl diselenide is a far better radical trap. As shown in Eq. (10), the reaction has been extended to thio-telluration. With the exception of norbornene and vinylcyclopropanes, for which the addition step is followed by the fast opening of the three-membered ring, thio-telluration does not proceed with olefins. In contrast, the thiotelluration of acetylenes is highly efficient. 

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

Synonyms Biphenyl disulfide Diphenyl disulfide Disulfide, diphenyl... 

Kodama et al. [291] have reported TG-DSC curves for the analysis of the interaction between vulcanisation accelerators (tetramethylthiuram disulfide, dibenzothiazolyl disulfide, diphenyl-guanidine and Af-cyclohexyl-2-benzothiazolylsul-fenamide) and fillers (CB, hard clay and CaCOs). The initial m.p. of the accelerators was largely influenced by the fillers. Emmott et al. [292] have investigated the complex reaction between Sr(N03)2 and the binder Alloprene (a pyrotechnic system) at about 300°C by simultaneous TG-DSC and TG-DTA-MS. The same techniques were used to examine the Ti-NaNOs-Alloprene and Mg-NaNOs-Alloprene systems [293-295]. 

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