Boron chlorides

C, b.p. 91 C, and has very similar properties to boron chloride but is a stronger Lewis acid. Diboron tetrabromide BjBr, is also known. 

Chemical Designations - Synonyms Boron Chloride Chemical Formula Bclj... 

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... 

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

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. 

Figure 1 is a sketch of a complete apparatus for the preparation of tetrachloro-diborane(4). Boron chlorides are very corrosive and attack many elastomers and vacuum greases, so only Teflon, Viton, and halocarbon greases should be used for seals and lubrication in the vacuum system. 

The boron trichloride can be reused in the experiment with only brief pumping at its melting point to remove excessive amounts of HC1. Traces of B2CU left in the BC13 have no adverse effects in subsequent runs. The reactor should be filled with nitrogen after all volatiles have been pumped out, opened to the air, and quickly put into a fume hood. The residues containing Cu, CuCl, and traces of boron chlorides, may fume slightly in air but they are not pyrophoric. 

In 1909, Dr. E. Weintraub of the General Electric Company ran high-potential alternating current arcs between cooled copper electrodes in a mixture of boron chloride with a large excess of hydrogen (51), obtaining pure fused boron which differed greatly in properties from the impure amorphous product of earlier workers. 

BORON TRICHLORIDE Boron Chloride Corrosive Material 4 0 4... 

Boron Chloride. See Boron Trichloride Boron Chloride Pentahydride, B2H5C1 mw 62.14, col gas highly unstable, bp -78° at 18mm(Ref 14, p 376)... 

Ainshtein, S. A., Syavtsillo, S. V., TurkePtaub, N. M. Gas chromatographic analysis of mixtures containing boron chloride. Gaz. Khromatogr., Akad. Nauk SSSR Tr. Vtoroi Vses. Konf., Moscow 1962, 270. — Chem. Abstr. 62, 4590 (1965). 

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... 

How can boron chloride be prepared How does this substance behave when treated with water How would it behave if boron were a strongly metallic element ... 

Iron monoboride, FeB, is readily formed by heating iron in a stream of vaporised boron chloride. It also results when iron and boron are heated together in the electric furnace.6 Obtained in this way iron boride forms brilliant yellow-grey crystals, of density 7T5 at 18° C. It does not alter in dry air or oxygen, but moist air renders it ochreous. Chlorine and bromine attack it at red heat and, when heated in oxygen, it burns brilliantly. 

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