109-63-7 boron fluoride ethyl ether

Synonyms boron fluoride etherate boron fluoride ethyl ether... 

Boron Trifluoride Ltherate. Boron fluoride ethyl ether boron fluoride etherate ethyl ether-boron trifluoride complex. C4HltBF30 mol wt 141.94. C 33.85%, H 7.10%, B 7.62%. F 40.16%, O 11.27%. (CH,CHj),O.BF,. Prepd by vapor-phase reaction of anhydr ether with BF, Lauben gayer, Finlay, J. Am. Chem. Soc. 65, 884 (1943). 

Shi et al. have developed another method for the electrochemical polymerization of high oxidation potential monomers in boron fluoride ethyl ether (BFEE) which could yield highly conducting PT films (Scheme 9.4) [32]. As observed in the case of the electropolymerization of 3-methylthiophene, bithiophene 2T and terthiophene 3T, such improvement stems from the lower oxidation potentials at which the electropolymerization occurs in BFEE compared with those required in common electrolytes. Recent development of this strategy by the Reynolds group has shown that thiophene, 3-methylthiophene, 3-bromothiophene and 3,4-dibromothiophene can be polymerized in BFEE to yield homogeneous, electroactive polymer films, where their electrochemical polymerization in common electrochemical solvents has proved much more difficult [33],... 

Stability. Another major facet in the overall performance of electrochromic materials is the stability of the system. Many potential issues, such as degradation of the active redox couple due to irreversible oxidation or reduction at extreme potentials, iR loss of the electrode or the electrolyte, detrimental side reactions due to the presence of water or oxygen in the cell or heat release due to the resistive parts in the system, can result in the eventual loss of electrochromic contrast and function [7]. One effective approach towards the improvement of electrochemical cycling stability is the use of boron fluoride ethyl ether (REEF.) during the electrochemical synthesis of some heterocyclic compounds (including thiophene and bithiophene) [20]. For example, Camurlu et al. have shown reasonable stability and a switching speed of less than 1.5 s for the homopolymer of hexanedioic acid bis (2-thiophen-3-ylethyl) ester (HABTE) [21],... 

Available forms Crystalline powder, dry amorphous powder, colloidal suspension of dry amorphous powder in oil in boron trifluoride-calcium fluoride, in potassium borofluoride, in boron trifluoride ethyl etherate, in boric acid. 

Alternate Names boron trifluoride diethyl etherate boron tri fluoride ethyl etherate boron trifluoride ethyl ether complex tri-fluoroboron diethyl etherate. 

Boron trifluoride etherate Ethyl ether, compd. with boron fluoride (BF )... 

Ethyl acetoacetate reacts with ehaleone in the presence of boron fluoride etherate affording 3-carbethoxy-2-methyl-4,6-diphenylpyryl-ium this can be hydrolyzed and decarboxylated to 2-methyl-4,6-diphenylpyrylium which should theoretically result from acetone and ehaleone. 

Boron trifluoride etherate Ethyl ether, compd. with boron fluoride (BF3) (1 1) (8) Ethane, 1,1-oxybis-, compd. with trifluoroborane (1 1) (9) (109-63-7)... 

During the periods in which a solvated ion is paired, it can decompose slowly to boron trifluoride, ethyl fluoride and diethyl ether ... 

Unlike boron fluoride, titanium tetrachloride does not catalyze the liquid phase polymerization of isobutylene under anhydrous conditions (Plesch et al., 83). The addition of titanium tetrachloride to a solution of the olefin in hexane at —80° failed to cause any reaction. Instantaneous polymerization occurred when moist air was added. Oxygen, nitrogen, carbon dioxide, and hydrogen chloride had no promoting effect. Ammonia and sulfur dioxide combined with the catalyst if these were added in small quantity only, subsequent addition of moist air permitted the polymerization to occur. Ethyl alcohol and ethyl ether, on the other hand, prevented the polymerization even on subsequent addition of moist air. They may be regarded as true poisons. 

Bi s (tri methyl si lyloxy )cyclobut-l-ene Silane, (1 -cyclobuten-1,2-ylenedioxy)bis[trimethyl- Silane, [1-cyclobutene-1,2-diylbis(oxy)]bis[trimethy1- (17082-61-0), 65, 17 Boron trifluoride etherate Ethyl ether, compd. with boron fluoride (BFj) (1 1) Ethane, 1,1 -oxybis-, compd. with trifluoroborane (1 1) (109-63-7), 65, 17... 

The procedure used is essentially that described by Meerwein and co-workers. 2, s The salt also has been prepared from ethyl fluoride and boron fluoride etherate, and from silver fluoborate, ethyl bromide, and ether.4... 

As the inner salts are generally unstable and insoluble, they cannot be manipulated and their structures were therefore inferred from those of the more stable nitrogen analogues. The inner oxonium salt from boron fluoride, when examined at low temperatures, was found to contain a molecule of ether of crystallization which was held very tenaciously and was involved in the complex decomposition of the salt at higher temperatures. The salt from antimony pentachloride did not contain this molecule of ether and decomposed to ethyl chloride and a mixture of alkoxy antimony tetrachlorides. The stannic chloride decomposed in at least two ways,... 

Ethylenediamine, Al,/V,A, A -tetramethyl- 1,2-Ethanediamine,, V,N.N1, h -tetramethyl-[110-18-9], 61,116 Ethylene glycol, 61, 65, 103 Ethyl ether, compared with boron fluoride (BF3)(1 1), 61, 116 Ethylmagnesium bromide, 60, 83 ETHYL threo-[ 1 -(2-HYDROXY-l, 2-DIPHENYL)ETHYL]CARBAMATE, 61,93... 

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