Boron tnfluonde

Boron tnfluonde etherate (Lewis acid Lewis base complex)... [Pg.46]

The product of this reaction a Lewis acid Lewis base complex called informally boron tnfluonde etherate may look unusual but it is a stable species with properties different from those of the reactants Its boiling point (126°C) for example is much higher than that of boron tnfluonde—a gas with a boiling point of — 100°C—and diethyl ether a liquid that boils at 34°C... [Pg.46]

Alkyl silyl ethers are cleaved by a variety of reagents Whether the silicon-oxygen or the carbon-oxygen bond is cleaved depends on the nature of the reagent used Treatment of alkoxysilanes with electrophilic reagents like antimony tri-fluonde, 40% hydrofluonc acid, or a boron tnfluonde-ether complex results in the cleavage of the silicon-oxygen bond to form mono-, di-, and tnfluorosiloxanes or silanes [19, 20, 21) (equations 18-20)... [Pg.205]

Intereshngly it is also possible to form a stable silicon-fluonne bond by treatment of a methoxysilole with boron-tnfluonde etherate or of a silole with tntyl tetrafluoroborate [106] The resultant fluorosilane is also a buildmg block for further transformations of the silole (equation 84)... [Pg.601]

Pentamethylcyclopentadienyl substituted boron complexes arc obtamed by the reaction of the pentamethylcyclopentadienyl anion with boron tnfluonde [109] (Table 27) Similarly, the Gngnard reagent prepared from 3,5-bis(tnfluorometh-yl)iodobenzene reacts with sodium tetrafluoroborate to form the phase-transfer eatalyst 2 under anhydrous eonditions [110] (equation 87)... [Pg.603]

Boron tnfluonde also reacts with hydroxy acndones to form difluoro boron complexes [111] (Table 28) Another route to fluoroboraties involves transhalogen-ation by fluonnation of the correspondmg chloro- and bromoboranes with lithium or potassium fluonde under mild conditions [112] (Table 29)... [Pg.603]

Hydrazoic acid reaction with cyclobu-tanecarboxyhc acid, 47, 28 Hydrogenation of t butylazidoacetate to glycme ( butyl ester, 46,47 Hydrogen bromide 46, 43 reaction with y butyrolactone, 46, 43 Hydrogen fluoride anhydrous, precautions in use of, 46, 3 in preparation of mtromum tetra-fluoroborate 47, 57 reaction with benzoyl chloride, 46,4 with boron tnfluonde in conversion of p cymene to m cymene, 47, 40 in bromofluorination of 1 heptene, 46, 11... [Pg.130]

Nitromum tetrafluoroborate, from nitric acid, boron tnfluonde, and hy drogen fluoride, 47, 56 m nitration of aromatic rings, 47,... [Pg.134]

Biphenylcarboxylic acid [[1,1 -Biphenyl] -2-carboxylic acid], 83 Boron tnfluonde, etherate, [Borane, tri-fluoro-, compd. with l,l -oxybis-[ethane] (11)], 10 Bromine, 108... [Pg.139]

Lubricant - [MOLYBDENUMAND COMPOUNDS] (Vol 16) -additives [SULFURIZATION AND SULFURCHLORINATION] (Vol 23) -barium as [BARIUM] (Vol 3) -bismuth compounds as [BISMUTH COMPOUNDS] (Vol 4) -boron nitride as [NITRIDES] (Vol 17) -boron tnfluonde as [FLUORINE COMPOUNDS,INORGANIC - BORON - BORON TRIFLUORIDE] (Vol 11) -ceriumcompdm [CERIUM AND CERIUM COMPOUNDS] (Vol 5) -glycerol as [GLYCEROL] (Vol 12) -hydrogenated terphenyls m [BIPHENYL AND TERPHENYLS] (Vol 4) -sodium tetrasulfidemmfg of [SODIUM COMPOUNDS - SODIUM SULFIDES] (Vol 22) -use of lime and limestone [LIME AND LIMESTONE] (Vol 15)... [Pg.579]

Molybdenum hexafluoride, in the presence of boron tnfluonde, reacts with acetic acid and haloacetic acids at 130-160 °C to give respectively, 1,1,1 tri fluoroethane and 1,1 1 tnfluorohaloethanes in 60-89% yields [240, 241] Prolonged treatment of pyridine mono and dicarboxylic acids with an excess of molybdenum hexafluoride at elevated temperatures provides the respective mono-and bis(tnfluoromethyl)pyndines in good yields [241] (equation 127)... [Pg.252]

Catalyst, alumina, 34, 79, 35, 73 ammonium acetate, 31, 25, 27 boron tnfluonde etherate, 38, 26 copper chromite, 31, 32, 36, 12 cupric acetate monohydrate, 38, 14 cuprous oxide silver oxide, 36, 36, 37 ferric nitrate, hydrated, 31, 53 phosphoric acid, 38, 25 piperidine, 31, 35 piperidine acetate, 31, 57 Raney nickel, 36, 21, 38, 22 sulfuric acid, 34, 26 Catechol, 33, 74 Cetylmalonic acid, 34, 16 Cetylmalonic ester, 34,13 Chlorination, by sulfuryl chloride, 33, 45, 37, 8... [Pg.97]

From the alkyne in methanol and a catalyst composed of boron tnfluonde etherate, red mercuric oxide and trichloroacetic acid... [Pg.27]

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