1-phenyl- -bromide

Unexpected cine substitution to afford 749. rather than ipso substitution, was observed in the reaction of the vinylstannane 748 derived from camphor with phenyl bromide[616]. 

For example, dithioben2oic acid [121 -68-6] results from the reaction of carbon disulfide, phenyl bromide, ether, and magnesium. Sodium a2idodithiocarbonate [38093-88-8] is prepared by the reaction of aqueous sodium a2ide [26628-22-8] at 40—50°C ... 

Chemical Designations - Synonyms Monobromobenzene Phenyl Bromide Bromobenzol Chemical Formula C HjBr. 

Repeat this analysis for the bromine addition and substitution reactions of benzene leading to trans-5,6-dibromo-l,3-cyclohexadiene and phenyl bromide, respectively. Do your thermochemical results account for the experimental observations ... 

Further organic storing materials Phenyl bromide [14], pyridine, 1 -picoline, 2,6-lutidine [15-17] Arsonium salts [18, 19] Phosphonium salts [20] Pyridinium bromides [21] Aromatic amines [22] Urotropin-bromine adduct [23] Pyridinium and sulfonium salts [24] Propionitril [25]... 

Last, the nickel catalyzed halogen exchange for haloarenes, actually the arylation of halide anions, has been investigated. The equilibrated exchange between the phenyl bromide (60 %) and the phenyliodide (40 %) allows with some... 

A series of new palladium complexes 26 bearing a phosphine-functionalised NHC ligand has been shown to be more efficient than typical catalytic systems (i.e. Pd(OAc), PPhj) for the reaction depicted in Scheme 7.10 [55], In fact, these conditions afforded the 9-benzylidene-97f-fluorene in higher yields when iodobenzene was used, whereas the reaction of the less reactive phenyl bromide with diphenylacetylene was achieved for the first time affording the desired product in moderate to good yields. 

Equation 11.12 Heck reaction with phenyl bromide. ... 

Quite recently, Troupel et al. have developed an effective synthesis of gem-difluoro-/ -oxonitriles using an electrogenerated base derived from phenyl bromide and a sacrificial magnesium anode together with a nickel cathode coated with a small deposit of cadmium as shown in Scheme 4.5 [34]. 

The resting state of this catalytic system was found to be the dimer shown. The migratory insertion is the rate-determining step and not the oxidative addition of aryl halide to a palladium zero species, see Figure 13.17. These kinetics were found for phenyl iodide phenyl bromide already showed less clear-cut kinetics indicating that the oxidative addition is somewhat slower now. The system shown in Figures 13.16-17 gives at least half a million turnovers. 

The cathodic reduction of phenyl bromide in an aprotic medium gives substituted furan as summarized in Scheme 88 [129-133],... 

Synonyms AI3-09059 BrBz BRN 1236661 Benzene bromide Bromobenzol CCRIS 5887 EINECS 203-623-8 Monobromobenzene Monobromobenzol NCI-C55492 NSC 6529 Phenyl bromide UN 2514. 

Phenylaniline. see 4-Aminobiphenyl p-Phenylaniline. see 4-Aminobiphenyl Phenylbenzene. see Biphenyl Phenyl bromide, see Bromobenzene... 

Usable equilibrium constants were obtained only for Ar = p-CHs, m-CHs (i.e. p-Tol and w -To1) and p-Ph and were reported for approach to equilibrium from both the left and right sides of the equation with equimolar concentrations of reactants. The averaged A obsd values are 0.64, 0.86 and 3.78, respectively. The corresponding values of AH, estimated from equation 13 are 1.1, 0.37 and —3.3 klmoP. From equation 11, the enthalpy of formation of p-tolyl lithium is calculated to be ca 3 klmoP where the enthalpy of formation of p-tolyl bromide is 12.1 kJmor, as suggested in Reference . The enthalpy of formation value for p-tolyl lithium derived here is nearly identical to that in Table 1. Unfortunately, there is no measured enthalpy of formation of m-tolyl bromide. However, the difference between the enthalpies of formation of phenyl bromide and phenyl lithium (9.8 kJmoU ) must be about the same as the difference between the enthalpies of formation of the m-tolyl bromide and the m-tolyl lithium when the reaction is thermoneutral for equation 12. 

BROMOBENZENE Monobromo-benzene, Phenyl Bromide, Bromobenzol Combustible Liquid, III 2 2 0... 

PhBr phenyl bromide Plumbatol Amer expl contg Pb nitrate TN... 

The dichloride reacts with magnesium phenyl bromide, CeHs.MgBr, in ether solution, with formation of diphenyl telluride, (C6H5)2Te. Tellurium dibromide and di-iodide give a similar result.8 In ether solution the dichloride absorbs bromine and iodine, but the products, presumably the chlorobromide and chloro-iodide, respectively, have not been isolated.9... 

Phenyl selenide, CeHg.SeH.1—This selenide may be obtained as follows (1) Selenium tetrachloride is allowed to react with benzene in the presence of aluminium chloride. (2) Magnesium phenyl bromide in ether solution is treated with finely divided selenium and the addition product treated with cold hydrochloric acid. The ether layer is then removed, the extracted solution treated with more ether and the extracts combined, then shaken with one equivalent of sodium hydroxide, calculated on the basis of the total amount of selenium used, and dissolved in water to make a 25 per cent, solution. The ether solution is then dried with calcium chloride, the ether removed and the residue distilled, diphenyl diselenide and diphenyl selenide, B.pt. 303° C., being obtained. The sodium hydroxide solution on acidification with a slight excess of concentrated hydrochloric acid, followed by three more extractions with ether, gives on removal of the solvent almost pure phenyl selenide, B.pt. 182° C. The product melts at 60° C., and is insoluble in water, but dissolves in alcohol mercuric chloride gives a white precipitate.2... 

Diphenyl diselenide, (CeH5)2Se2, is formed as a by-product in the preparation of phenyl selenide when magnesium phenyl bromide in ether solution reacts with selenium.5 A 2 per cent, yield is obtained when benzene, aluminium and selenium bromides react in dilute carbon disulphide solution. The product melts at 62° C.6 The corresponding oxide is an oil, B.pt. 230° C. at 65 mm.,7 and the sulphide, (C6H5)2Se2S, M.pt. 55° C., is obtained from sulphur chloride and phenyl selenide in carbon disulphide solution.8... 

Only one mixed telluride, RTeR, is known, namely, phenyl-p-tolyl telluride, and this is prepared by the interaction of magnesium phenyl bromide and di-p-tolyl tellurium dibromide. 

Benzaldehyde and magnesium phenyl bromide or iodide give diphenyl carbinol. 

The Grignard reagent—magnesium phenyl bromide—is prepared as described in Preparation 21 from 1-2 gms. (1 mol.) of dry magnesium and 8 gms. (1 mol.) of dry bromobenzene. 6-8 gms. (1 mol.) of dry methyl benzoate dissolved in 25 gms. of sodium-dried ether are added to the cold solution, slowly and with constant shaking. The liquid is then heated on a water bath until no further change takes place. Ice and dilute sulphuric acid are added to the cold reaction mixture, which, when the precipitate has dissolved, is steam distilled. The triphenyl carbinol which remains is recrystallised from benzene. 

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