Copper bromide CuBr

Benzoic acid, o-bromo- (8) Benzoic acid, 2-bromo- (9) (88-65-3) Copper(I) bromide Copper bromide (CuBr) (8,9) (7787-70-4) Sodium hydride (8,9) (7646-69-7)... 

CsICl2 Cesium iododichloride, 4 9 CsNOs Cesium nitrate, 4 6 1-hydrogen nitrate, 4 7 CsN3 Cesium azide, 1 79 CuBr Copper(I) bromide, 2 3 CuCl Copper(I) chloride, 2 1 [CuC1-CO]-2H20 Copper carbonyl chloride, 2 4... 

Whereas interaction between 2-thienyllithium and 2-furyllithium and carbon disulfide in THF affords the corresponding dithioates RCSSLi as the predominant products, aryllithium compounds seem to attack mainly on sulfur with formation of arenethiolates and tarry products [9]. If during the addition of carbon disulfide copper bromide is present in the solution, however, the desired formation of Ar—CSSLi does take place and subsequent addition of methyl iodide affords the dithioesters in good yields. Good results are also obtained when using less than stoichiometric amounts of CuBr. We therefore presume that carbon disulfide reacts more easily with the arylcopper intermediate than with aryllithium copper is subsequently transmitted from the copper dithioate to aryllithium. 

Copper bromide (CuBr) Copper monobromide Copper(l-i-) bromide Copper(l) bromide Cuprous bromide EINECS 232-131-6 HSDB 270. Used as a catalyst in organic reactions. Solid mp = 504° bp B 1345° d = 4.72 slightly soluble in H2O. Atomergic Chemetals Cerac Hoechst Celanese Sigma-Aldrich Fine Chem. 

Caprolactone (CL) (Acros, 99%) was dried over calcium hydride at r.t. for 48h and then distilled under reduced pressure. 2-(N,N-dimethylamino)ethyl methaciylate (DMAEMA) (Aldrich, 98%) was deprived of its inhibitor by filtration through a basic alumina column, and depending on samples (see text) dried over calcium hydride at r.t. for 24h and then distilled under reduced pressme. Butane-1,4-diol (Acros, > 99%) was dried over calcium hydride for 48h at r.t. and distilled at 70°C under reduced pressure. Triethylamine (NEts, Fluka, 99%) was dried over barium oxide for 48h at r.t. and distilled under reduced pressure. Copper bromide (CuBr, Fluka, 98%) was purified in acetic acid and recrystallized in ethanol under inert atmosphere until a white powder is obtained. Tin(ll) bis-2-ethyl hexanoate (Sn(Oct)2, Aldrich, 95%), methacrylic anhydride (Aldrich, 94%), N,N-dimethylamino-4-pyridine (DMAP, Acros 99%), 1,1,4,7,10,10-hexamethyltriethylene tetramine (HMTETA, Aldrich, 97%), ethyl-2-bromoisobutyrate (E BBr, Aldrich, 98%), N,N-dicyclohexylcarbodiimide (DCC, Acros, 99%), were used as received. Tetrahydrofuran (THF, Labscan, 99%) was dried over molecular sieves (4A) and distilled over polystyryl lithium (PS LC) complex under reduced pressure just before use. Toluene (Labscan, 99%) was dried by refluxing over CaH2. 

Treatment of diazonium salts with cuprous, Cu(I), salts generates aryl halides. When 398 reacts with CuCl (cuprous chloride) or CuBr (cuprous bromide), the products are chlorobenzene or bromobenzene via what is probably a radical reaction.29l jhis conversion is known as the Sandmeyer reaction. 2 The use of copper powder rather than cuprous salts for this transformation is often called the Gattermann reaction. 93,292b,c Aryl iodides are also produced from diazonium salts by reaction with potassium iodide (KI) but the actual reactive species may be l3-.294,295 Treatment of aniline derivative 403 with sodium nitrite and HCl followed by treatment with KI, for example, gave a 89% yield of 404.Aryl nitriles are generated under Sandmeyer conditions using cuprous cyanide (CuCN), as in the conversion of 405 to benzonitrile derivative 407 via diazonium chloride, 406. 

CAS 7787-70-4 EINECS/ELINCS 232-131-6 Synonyms Copper bromide Copper (I) bromide Cuprous bromide Empincai BrCu Formuia CuBr... 

Copper bromide, CuBr 5 XI0 Cadmium sulfide, CdS 1.0X10 ... 

In addition to the metal ion, the halide ion has also got an influence on the kinetic of ATRP by affecting the atom transfer equilibrium. The use of copper bromide instead of copper chloride leads to more rapidly decreasing polydispersities (/ -toluenesulfonyl chloride/copper chloride ( -TsCl/CuCl) conversion = 25%, Mn = 8500, M /Mn = 2 -TsCl/CuBr for the same conversion, Mn = 7800, M /Mn= 1.18 [294,295]). This can be assigned to the better efficiency of bromine in the deactivation step [307,308]. 

Copper(I) bromide, CuBr Silver bromide, AgBr Iodides... 

The oxidative coupling of benzothiazoles with azine JV-oxides is promoted by catalytic Pd(OAc)2 and CuBr and stoichiometric Cu(OPiv)2 (eq 142). The copper pivalate salt plays a dual role oxidant and concerted metalation-deprotonation (CMD) promoter, while the role of copper bromide is less obvious. 

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