Boron trilluoride

Boron diiodophosphide, 0149 Boron tribromide, 0122 Boron trichloride, 0127 Boron trilluoride, 0129... 

Boron trilluoride diethyl etherate, 1674 Boron triiodide, 0150... 

This electrophile/nucleophile dichotomy can be looked upon as a special case of the acid/base idea. The classical definition of acids and bases is that the former are proton donors, and the latter proton acceptors. This was made more general by Lewis, who defined acids as compounds prepared to accept electron pairs, and bases as substances that could provide such pairs. This would include a number of compounds not previously thought of as acids and bases, e.g. boron trilluoride (39),... 

Patents assigned to Mobil (277) describe the use of boron trilluoride supported on several porous carriers. BF3 supported on silica was found to exhibit a slightly higher performance with added water in the alkylation of a mixed alkene feed at 273 K. It was also shown that self-alkylation activity was considerably lower than that with HF as catalyst Another patent (278) describes the use of a pillared layered sihcate, MCM-25, promoted with BF3 to give a high-quahty alkylate at temperatures of about 273 K. BF3 was also supported on zeohte BEA, with adsorbed water still present (279). This composite catalyst exhibited low butene isomerization activity, which was evident from the inferior results obtained with... 

O Scheme IT). In the s)rnthesis of phosphorylated pyranosyl nucleosides (which inhibit replication of HCMV in NHDF cells) such as 28, the key step [38] consisted of the Ferrier-type coupling of glycals with alkyl phosphites catalyzed with boron trilluoride etherate. 

Color reactions Boric acid (hydroxyquinones). Dimethylaminobenzaldehyde (pyrroles). Ferric chloride (enols, phenols). Haloform test. Phenylhydrazine (Porter-Silber reaction). Sulfoacetic acid (Liebermann-Burchard test). Tetranitromethane (unsaturation). Condensation catalysts /3-Alanine. Ammonium acetate (formate). Ammonium nitrate. Benzyltrimethylammonium chloride. Boric acid. Boron trilluoride. Calcium hydride. Cesium fluoride. Glycine. Ion-exchange resins. Lead oxide. Lithium amide. Mercuric cyanide. 3-Methyl-l-ethyl-2-phosphoiene-l-oxlde. 3-Methyl-1-phenyi-3-phoipholene-1-oxide. Oxalic acid. Perchloric acid. Piperidine. Potaiaium r-butoxIde. Potassium fluoride. Potassium... 

The hydrogen at the methine bridges can be replaced with a methyl group to give Me-LPPP (106) (Scheme 49) [132]. This is achieved by treating the precursor polymer 103 with methyl lithium, followed by ring-closure of the resulting polyalcohol 107 with boron-trilluoride as in the preparation of 5. 

Olah, G. A. et al., J. Inorg. Nucl. Chem., 1960, 14, 295-296 Experimental directions must be followed exactly to prevent violent spontaneous explosions during preparation of the salt from silver oxide and boron trilluoride etherate in nitromethane, according to the earlier method [1]. The later method [3] is generally safer than that in [2],... 

CYCLOHEXYLIDENEACETALDEHYDES Manganese dioxide. CYCLOPENTANONES Magnesium. 1-Phenylthiocyclopropyltriphenylpho.sphonium fluoroborate. Simmons Smith reagent. Sodium tetracarbonylferratef-ll). CYCLOPENTENONES 3-Benzyl-5-(2-hydroxyethyl)-4-methyl-l,3-thiazoliuin chloride. Boron trilluoride etheratc. Lithium dimethoxyphosphinylmethylide. Silver tetra-fluoroborate. Titanium tetrachloride. Triethyl phosphite. Vinyl triphenylphos-phonium bromide. 

Boron trilluoride-amine complex curing agent, epoxies laminates Ancamine 1637 Ancamine 1784 Ancamlne 2021 Anchor 1222 Capcure 3830-81 Epikure 3025 Epikure 3125 Epikure 3140 Epikure 3270 Epikure 3271 Epikure 3282 Jeffamine D-230 Uni-Rez 2810 Versamine 900 Versamine 908... 

Diels—Alder reactions are usually accelerated by Lewis acid catalysts such as aluminum chloride, boron trilluoride and tin(IV) chloride. In the presence of... 

As allyl components for IPN synthesis the following compounds were used diethylene glycol bis(allyl carbonate) (DEGAC), diallyl phthalate (DAP), dial-lyl adipate (DAA), and the commercial product of condensation of monoallyl maleinate and epoxy oligomer ED-20. Polymerization of diallyl compoimds by formation of IPNs had been performed in the presence of 5 mass % of dibenzoyl peroxide for DEGAC and diciunyl peroxide. As a hardener of epoxy oligomer, complexes of boron trilluoride with an aniline and benzylamine have been used. 

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