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Boron bromides

Boron Bromide. Approximately 30% of BBr produced in the United States is consumed in the manufacture of proprietory pharmaceuticals (qv) (7). BBr is used in the manufacture of isotopicaHy enriched crystalline boron, as a Etiedel-Crafts catalyst in various polymerization, alkylation, and acylation reactions, and in semiconductor doping and etching. Examples of use of BBr as a catalyst include copolymerization of butadiene with olefins (112) polymerization of ethylene and propylene (113), and A/-vinylcarbazole (114) in hydroboration reactions and in tritium labeling of steroids and aryl rings (5). [Pg.224]

Coordination compounds of boron bromide and boron iodide. D. R. Martin, Chem. Rev., 1948,42, 581-599 (33). [Pg.63]

The X-ray structures of the boron bromide and boron chloride complexes confirm the tridentate coordination of the triacetylrhenato ligand to the boron atom. Both molecules have crystallographically imposed mirror symmetry. Although both compounds decompose appreciably during data... [Pg.55]

Bordetella pertussis Toxin Borer Sol Boroethane Boron Bromide Boron Chloride Boron Fluoride Boron Hydride Boron Tribromide Boron Trichloride Boron Trifluoride Botox... [Pg.636]

Ring-opening reactions of tartrate acetal 211 with cuprates and dialkyl boron bromides were conducted (Scheme 96). 9 The reaction proceeds stereoselectively in favor of the formation of 212. Ester groups are tolerant to these reaction conditions. [Pg.472]

In all 28 parameters were individually mapped alkalinity, aluminum, antimony, arsenic, barium, boron, bromide, cadmium, calcium, chloride, chromium, conductivity, copper, fluoride, hardness, iron, lead, magnesium, manganese, nitrate, pH, potassium, selenium, sodium, sulphate, thallium, uranium, and zinc. These parameters constitute the standard inorganic analysis conducted at the DENV Analytical Services Laboratory. [Pg.458]

Boron tribromide Boron bromide (8) Borane, tribromo- (9) (10294-33-4) Trifluoroacetic acid Acetic acid, trifluoro- (8,9) (76-05-1)... [Pg.216]

Boron azide diiodide, 0148 Boron bromide diiodide, 0120... [Pg.284]

The catalytic activity of certain of the Friedel-Crafts catalysts was shown to decrease over a very wide range in the series boron fluoride, aluminum bromide, titanium tetrachloride, titanium tetrabromide, boron chloride, boron bromide and stannic chloride (Fairbrother and Seymour, mentioned in Plesch al., 83). When boron fluoride is added to isobutylene at dry ice temperatures, the olefin is converted to a solid polymer within a very few seconds. The time required for complete polymerization with aluminum bromide hardly extends to a few minutes while reaction times of hours are required with titanium chloride and periods of days with stannic chloride. [Pg.71]

Boron tribromide Boron bromide (8) Borane, tribromo- (9) (10294-33-4) Bromobis(dimethylamino)borane Borane, bromobis(dimethylamino)- (8) Boranediamine, 1-bromo-N,N,N, N -tetramethyl- (9) (6990-27-8) Tetrakis(dimethylamino)diboron Diborane(4), tetrakis(dimethylamino)- (8) Diborane(4)tetramine, octamethyl- (9) (1630-79-1)... [Pg.185]

Boron bromide reacts with the trichloride thus 4... [Pg.109]

Boron Bromide. See Boron Tribromide Boron Bromide Diiodide, BBrI2 mw 344.58, col liq, bp 180°(Ref 14,p 376)... [Pg.252]

The electrophilic addition of hydrogen-bearing boranes to alkenes (hydroboration), now recognized as a vital component of organic synthesis, is covered in Chapter 1.7 of this volume. The boron compounds that do fall under the realm of this chapter are boron bromides. Suzuki and coworkers have demonstrated... [Pg.357]

Borazole (borazine), derivatives of, from boron halide-amine coordination compounds, 5 28 Boric acid, H3BO3, esters of, 6 29 Boron bromide, 3 27, 29 Boron chloride, 3 27, 28, 29 Boron chloride-trimethylamine, 6 27... [Pg.227]

Ethers Aluminum chloride-Sodium iodide. Aluminum iodide. Bis(isopropylthio)boron hromide. Boron trichloride. Boron trifluoride etherate. Bromotrimethylsilane. 2-Chloro-1,3,2-dithioborolane. Chlorotri-methylsilane-Acetic anhydride. Chlorotri-methylsilane-Sodium iodide. Dimethyl-boron bromide. Pyridinium p-toluenesulfo-nate. Sodium methaneselenolate. [Pg.659]

Alcohols t-Butyldiphenylchlorosilane, 2-Benzyloxy-l-propene. Bis(iso-propylthio)boron bromide. t-Butylmethox-yphenylsilyl bromide. 2,3-Dichloro-5,6-di-cyano-l,4-benzoquinone. Mercury(II) chloride.4,4, 4 -Tris(4,5-dichlorophthalam-idoltrityl bromide. Tetramethylguanidine. Aldehydes Lithium moipolide. Organotitan-ium compounds. [Pg.662]

See other pages where Boron bromides is mentioned: [Pg.65]    [Pg.66]    [Pg.55]    [Pg.56]    [Pg.88]    [Pg.29]    [Pg.92]    [Pg.113]    [Pg.252]    [Pg.66]    [Pg.2056]    [Pg.59]    [Pg.57]    [Pg.57]   
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