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Pentafluorobenzoate

Replacement of hydroxyl by fluorine converts perfluoroalkanecarboxylic acids toperfluoroalkanoylfluorides The short chain acids react exothermally with FAR added in a dropwise manner, whereas the longer chain acids require heating [78] (equation 49) Attempts to fluorinate pentafluorobenzoic acid with FAR leads to decarboxylation to give pentafluorobenzene [78]... [Pg.219]

Alkaline hydrolysis of pentafluorobenzoic acid, the probable intermediate in the alkaline hydrolysis of perfluorotoluene, gives a high yield of p-hydroxytetra fluorobenzoic acid [9, 10 (equation 10)... [Pg.425]

Attempts to prepare the primary amine complex Pt(C6F5)2en (en = ethane-1,2-diamine) by decarboxylation from PtCl2en and thallous pentafluorobenzoate in pyridine unexpectedly gave the organoamidoplatinum complex, [N,N -bis(2,3,5,6-tetrafluorophenyl)ethane-1,2-diaminato(2-) ] dipyridineplatinum(II) [Eq. (53)] (66). The proposed reaction sequence... [Pg.250]

Polyfluorobenzyl alcohols are one class of fluorinated starting materials for medicinal and agricultural usage. Practical electrochemical methods for the product-selective synthesis of polyfluorobenzyl alcohols have been developed [79, 80], 2,3,4,5,6-Pentafluorobenzoic acid is reduced selectively to 2,3,4,5,6-pentafluorobenzyl alcohol at amalgamated lead, zinc and cadmium cathodes in aqueous sulfuric acid solutions, while 2,3,5,6-tetrafluorobenzyl alcohol can also be obtained selectively by using the non-amalgamated cathodes in solutions containing small amounts of a quartemary ammonium salt [79],... [Pg.45]

J. D. Cox, H. A. Gundry, A. J. Head. Thermodynamic Properties of Fluorine Compounds. Part 1. Heats of Combustion ofp-Fluorobenzoic Acid, Pentafluorobenzoic Acid, Hexafluorobenzene, and Decafluorocyclohexene. Trans. Faraday Soc. 1964, 60, 653-665. [Pg.251]

We have examined the competing isomerization and solvolysis reactions of 1-4-(methylphenyl)ethyl pentafluorobenzoate with two goals in mind (1) We wanted to use the increased sensitivity of modern analytical methods to extend oxygen-18 scrambling studies to mostly aqueous solutions, where we have obtained extensive data for nucleophilic substitution reactions of 1-phenylethyl derivatives. (2) We were interested in comparing the first-order rate constant for internal return of a carbocation-carboxylate anion pair with the corresponding second-order rate constant for the bimolecular combination of the same carbocation with a carboxylate anion, in order to examine the effect of aqueous solvation of free carboxylate anions on their reactivity toward addition to carbocations. [Pg.327]

Pentaerithyritol tetranitrate (PETN) reductase, 50 Pentaerythritoltetranitrate reductase, 57 Pentafluorobenzoate, 14... [Pg.341]

Geens T, Neels H, Covad A (2009) Sensitive and selective method for the determination of bisphenol-A and triclosan in serum and urine as pentafluorobenzoate-derivatives using GC-ECNI/MS. J Chromatogr B Anal Technol Biomed Life Sci 877 4042-4046... [Pg.297]

Fig. 4 High-resolution solid-state NMR spectrum of the 1 1 cocrystal containing benzoic acid (BA) and pentafluorobenzoic acid (PFBA). The two peaks at ca. 174 ppm represent the carboxylic acid group of PFBA and the two peaks at ca. 167 ppm represent the carboxylic acid group of BA... Fig. 4 High-resolution solid-state NMR spectrum of the 1 1 cocrystal containing benzoic acid (BA) and pentafluorobenzoic acid (PFBA). The two peaks at ca. 174 ppm represent the carboxylic acid group of PFBA and the two peaks at ca. 167 ppm represent the carboxylic acid group of BA...
In contrast to the extensive investigation of fluorovinylzinc reagents and their synthetic utility, only limited literature exists on fluorinated arylzinc reagents. Bis(pentafluorophenyl) zinc can be prepared by the reaction of zinc chloride with either pentafluorophenyllithium or pentafluorophenylmagnesium bromide (equation 70)64,65. An alternative route is via decarboxylation of zinc bis(pentafluorobenzoate) (equation 71)65. [Pg.732]

Pentafluorobenzoic acid [602-94-8] M 212.1, m 101-103 , 103-104 , 104-105 , 106-107 . Dissolve in Et20, treat with charcoal, filter, dry (CaSO4), filter, evaporate and recrystallise residue from pet ether (b 90-100°) after adding a little toluene to give large colourless plates. UV (H2O) Xmax 265nm (e 761). The S-benzylisothiuronium salt has m 187° after recrystn from H2O. [McBee and Rapkin JACS 73 1366 1951-. Nield et al. JCS 166, 170 7959]. [Pg.295]

FLUORINECOMPOUNDS,ORGANIC - FLUORINATED AROMATIC COMPOUNDS] (Volll) Pentafluorobenzoic acid [602-94-8]... [Pg.731]

Alkaline hydrolysis of pentafluorobenzoic acid gives a high yield of perfluoro-4-hydroxybenzoic acid (4),35 -37... [Pg.386]

Pentafluorobenzoic acid with sodium methoxide yields tetrafluoro-4-methoxybenzoic acid (24).98... [Pg.399]

See other pages where Pentafluorobenzoate is mentioned: [Pg.570]    [Pg.605]    [Pg.731]    [Pg.327]    [Pg.404]    [Pg.440]    [Pg.250]    [Pg.251]    [Pg.251]    [Pg.252]    [Pg.252]    [Pg.254]    [Pg.255]    [Pg.97]    [Pg.71]    [Pg.71]    [Pg.76]    [Pg.97]    [Pg.839]    [Pg.874]    [Pg.534]    [Pg.323]    [Pg.327]    [Pg.331]    [Pg.336]    [Pg.259]    [Pg.341]    [Pg.147]    [Pg.168]    [Pg.338]    [Pg.339]    [Pg.339]   
See also in sourсe #XX -- [ Pg.14 ]



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1- 4- ethyl pentafluorobenzoate

Methyl pentafluorobenzoate

Pentafluorobenzoic acid

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