- Dehalogenative aromatization of perchlorofluoroalicyclic compounds C6Cl6F6, C10Cl8F8 and C5Cl4F5N in the vapour phase or in solution
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Dehalogenation of perhalogenated cyclohexanes C6Cl6F6, 1-azacyclohexenes C5Cl4F5N and bicyclo[4.4.0]dec-1(6)-enes C10Cl8F8 in the vapour phase over iron fil
- Bardin, Vadim V.,Trukhin, Dmitrii V.,Adonin, Nicolay Yu.,Starichenko, Vladimir F.
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- Formation of NO(A 2Σ+, C 2Πr, D 2Σ+) by the ion-ion neutralization reactions of NO+ with C6F5Cl-, C6F5Br-, and C6F5- at thermal energy
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The ion-ion neutralization reactions of NO+(Χ 1Σ+:υ″ = 0) with C6F5Cl-, C6F5Br-, and C6F5- have been spectroscopically studied in the flowing helium afterglow. The NO(Α 2Σ+ - Χ 2Πr,C 2Πr-Χ 2Πr,D 2Σ+-Χ 2Πr) emission systems are observed in the NO+/C6F5Cl- reaction with the branching ratios of 0.96, 0.017, and 0.028, respectively, while only the NO(Α-Χ) emission system is found in the NO+/C6F5Br- and NO+/C6F5- reactions. The vibrational and rotational distributions of NO(Α, C, D) indicate that only 1%-11% of the excess energy is deposited into vibration and rotation of NO(Α, C, D) for all the reactions. In the NO+/C6F5X- (X=Cl,Br) reactions, a major part of the excess energy is expected to be partitioned into the relative translational energy of the neutral products and the vibrational energy of C6F5X. A comparison of the observed vibrational and rotational distributions with the statistical prior ones indicates that the reaction dynamics is not governed by a simple statistical theory because of the large impact parameter. The excitation mechanism of NO(Α, C, D) in the ion-ion neutralization reactions of NO+ with C6F5X- (X=F,Cl,Br,CF3) and C6F5- is discussed.
- Tsuji, Masaharu,Ishimi, Hiroaki,Nishimura, Yukio,Obase, Hiroshi
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- The formation of 1,2,3,4-tetrafluoronaphthalene in the co-pyrolysis of pentafluorobenzenesulphonyl chloride or pentafluoronitrobenzene with butadiene
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Co-pyrolysis of pentafluorobenzenesulphonyl chloride or pentafluoronitrobenzene with butadiene in a flow system at 500-635°C gave 1,2,3,4-tetrafluoronaphthalene.
- Platonov,Osina,Maksimov,Kolechkina
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Read Online
- PROCESS FOR THE PREPARATION OF ORGANIC HALIDES
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The present invention provides a halo-de-carboxylation process for the preparation of organic chlorides, organic bromides and mixtures thereof, from their corresponding carboxylic acids, using a chlorinating agent selected from trichloroisocyanuric acid (TCCA), dichloroisocyanuric acid (DCCA), or combination thereof, and a brominating agent.
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Paragraph 00146
(2017/08/01)
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- Unexpected distinction in reactivity of pentafluorobenzenesulfonyl halides toward organolithiums and organomagnesium halides
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C6F5SO2Cl reacts with organolithiums and organomagnesium halides RM (R = Me, Bu, Ph; M = Li, MgX) to give mainly C6F5H and C6F5Cl. C6F5SO2Br and
- Bardin, Vadim V.,Maksimov, Alexander M.
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p. 731 - 737
(2017/10/16)
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- Synthesis of chloropolyfluoroarenes from polyfluoroarenethiols and PCl5
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Replacement of the thiol group in polyfluoroarenethiols with chlorine was performed by treating with PCl5 as chlorinating agent. By heating in ampules at 200-220°C polyfluoro- and polyfluorochloroarenethiols with PCl5 mono- and dichloropolyfluoroarenes and also 1,2,4-trifluorotrichlorobenzene were synthesized. Dichloropolyfluoroarenes contain chlorine atoms in ortho- and para-positions.
- Nikul'shin,Maksimov,Platonov
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p. 200 - 205
(2016/04/19)
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- Xenon(IV)-carbon bond of [C6F5XeF2]+; Structural characterization and bonding of [C6F5XeF2][BF4], [C6F5XeF2][BF4]·2HF, and [C6F5XeF2][BF4]· n NCCH 3 (n = 1, 2); And the fluorinating properties of [C6F5XeF2][BF4]
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The [C6F5XeF2]+ cation is the only example of a XeIV-C bond, which had only been previously characterized as its [BF4]- salt in solution by multi-NMR spectroscopy. The [BF4]- salt and its new CH3CN and HF solvates, [C6F5XeF2][BF4]·1.5CH3CN and [C6F5XeF2][BF4]·2HF, have now been synthesized and fully characterized in the solid state by lowerature, single-crystal X-ray diffraction and Raman spectroscopy. Crystalline [C6F5XeF2][BF4] and [C6F5XeF2][BF4]·1.5CH3CN were obtained from CH3CN/CH2Cl2 solvent mixtures, and [C6F5XeF2][BF4]·2HF was obtained from anhydrous HF (aHF), where [C6F5XeF2][BF4]·1.5CH3CN is comprised of an equimolar mixture of [C6F5XeF2][BF4]·CH3CN and [C6F5XeF2][BF4]·2CH3CN. The crystal structures show that the [C6F5XeF2]+ cation has two short contacts with the F atoms of [BF4]- or with the F or N atoms of the solvent molecules, HF and CH3CN. The lowerature solid-state Raman spectra of [C6F5XeF2][BF4] and C6F5IF2 were assigned with the aid of quantum-chemical calculations. The bonding in [C6F5XeF2]+, C6F5IF2, [C6F5XeF2][BF4], [C6F5XeF2][BF4]·CH3CN, [C6F5XeF2][BF4]·2CH3CN, and [C6F5XeF2][BF4]·2HF was assessed with the aid of natural bond orbital analyses and molecular orbital calculations. The 129Xe, 19F, and 11B NMR spectra of [C6F5XeF2][BF4] in aHF are reported and compared with the 19F NMR spectrum of C6F5IF2, and all previously unreported J(129Xe-19F) and J(19F-19F) couplings were determined. The long-term solution stabilities of [C6F5XeF2][BF4] were investigated by 19F NMR spectroscopy and the oxidative fluorinating properties of [C6F5XeF2][BF4] were demonstrated by studies of its reactivity with K[C6F5BF3], Pn(C6F5)3 (Pn = P, As, or Bi), and C6F5X (X = Br or I).
- Koppe, Karsten,Haner, Jamie,Mercier, Hlne P. A.,Frohn, Hermann-J.,Schrobilgen, Gary J.
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p. 11640 - 11661
(2015/01/16)
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- Interaction of the electrophilic bis(pentafluorophenyl)iodonium cation [(C6F5)2I]+ with the ambident pseudohalogenide anions [SCN]- and [CN]-
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The iodonium pseudohalide compounds, [(C6F5) 2I][X] (X = SCN and CN) were synthesized by means of fluoride substitution in [(C6F5)2I][F] with the Lewis acidic reagents (CH3)3Si-NCS and (CH3) 3Si-CN. The isolated iodonium pseudohalides are intrinsically unstable solids. Decomposition resulted in equimolar amounts of C 6F5I and C6F5SCN or C 6F5I and C6F5CN, respectively. In case of [(C6F5)2I][SCN] single crystals could be grown from CH2Cl2. The crystal structure revealed a dimer with an eight membered ring formed by two ambident anions bridging the iodine atoms of two cations by N and S coordination. The favored dimerization of [(C6F5)2I][SCN] and [(C6F 5)2I][CN] in the gas phase is supported by ab initio computations.
- Hirschberg, Markus E.,Barthen, Peter,Frohn, Hermann-Josef,Bl?ser, Dieter,Tobey, Briac,Jansen, Georg
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- A neutral Gold(III)-Boron transmetalation
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The occurrence of direct transmetalation between gold(III) and boron species during gold-catalyzed cross-coupling reactions has recently become the subject of intense discussion. In this work, we investigate the transmetalation reaction between discrete, stable gold(III) complexes and boron reagents. Interestingly, electron-rich arylboronic acids remain unreactive under neutral conditions, whereas electron-deficient species undergo transmetalation in a highly efficient manner.
- Hofer, Manuel,Gomez-Bengoa, Enrique,Nevado, Cristina
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supporting information
p. 1328 - 1332
(2014/04/17)
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- Thermal versus photochemical reductive elimination of aryl chlorides from NHC-gold complexes
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Two homologous complexes of the type [(NHC)AuI-Ar], in which the aryl substituent was either phenyl or pentafluorophenyl, were prepared. Treatment of [(IPr)AuIC6F5] with PhICl 2 leads directly to the expected AuIII oxidation addition product [(IPr)AuIII(Cl)2C6F5]. This complex is thermally stable but undergoes photochemical reductive elimination to deliver [(IPr)AuICl] and C6F5Cl. In contrast, the reaction of [(IPr)AuIPh] with PhICl2 does not deliver an isolable AuIII oxidation addition product but rather leads directly to the formation of [(IPr)AuICl] and PhCl, presumably via a [(IPr)AuIII(Cl)2Ph] intermediate. These related reactivity pathways are rationalized on the basis of the electronic structures of the two [(NHC)AuI-Ar] complexes.
- Ghidiu, Michael J.,Pistner, Allen J.,Yap, Glenn P. A.,Lutterman, Daniel A.,Rosenthal, Joel
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supporting information
p. 5026 - 5029
(2013/10/08)
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- Acid-catalyzed polyfluoroarylation of arenes with polyfluorinated mono- and tris(phenoxy)-1-oxaspiro[2.5]octa-4,7-dienes
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4,5,6,7,8-Pentafluoro-6-pentafluorophenoxy-1-oxaspiro[2.5]octa-4,7-diene and 4,6,8-tri-fluoro-5,6,7-tris(pentafluorophenoxy)-1-oxaspiro[2.5]octa-4,7- diene react with electron-rich arenes in the presence of AlCl3 or H2SO4 to give polyfluorinated phenoxybiaryls.
- Kovtonyuk,Kobrina
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experimental part
p. 2021 - 2026
(2012/09/07)
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- Organofluorine sulfur-containing compounds: V. Joint pyrolysis with chlorine or bromine of polyfluoroarenethioles, polyfluorohetarenethioles, and their derivatives
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Joint pyrolysis with chlorine and bromine of polyfluoroarenethiols, -hetarenethiols, and their derivatives at 300-650°C furnished polyfluorocompounds containing chlorine and bromine. 2005 Pleiades Publishing, Inc.
- Platonov,Maksimov,Dvornikova,Nikul'shin
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p. 1647 - 1653
(2007/10/03)
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- Chloro- and bromo-defluorination of hexafluorobenzene and octafluorotoluene
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Halo(chloro, bromo)defluorination of perfluorobenzaene and toluene efficiently occurs under the action of appropriate alkali metal halides in the presence of hexaethylguanidinium chloride in catalytic amount. The relative efficiency of halide anions and m
- Shipilov,Zolotkova,Igumnov
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p. 1117 - 1120
(2007/10/03)
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- N-halosuccinimide/BF3-H2O, efficient electrophilic halogenating systems for aromatics
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N-Halosuccinimides (NXS, 1) are efficiently activated in trifluoromethanesulfonic acid and BF3-H2O, allowing the halogenations of deactivated aromatics. Because BF3-H2O is more economic, easy to prepare, nonoxidizing, and offers sufficiently high acidity (-H0 ≈ 12, only slightly lower than that of trifluoromethanesulfonic acid), an efficient new electrophilic reagent combination of NXS/BF3-H2O has been developed. DFT calculations at the B3LYP/6-311++G**//B3LYP/6-31G* level suggest that protonated N-halosuccinimides undergo further protosolvation at higher acidities to reactive superelectrophilic species capable either in the transfer of X+ from the protonated forms of NXS to the aromatic substrate or in forming a highly reactive and solvated X+ which would readily react with the aromatic substrates. Structural aspects of the BF 3-H2O complex have also been investigated.
- Prakash, G. K. Surya,Mathew, Thomas,Hoole, Dushyanthi,Esteves, Pierre M.,Wang, Qi,Rasul, Golam,Olah, George A.
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p. 15770 - 15776
(2007/10/03)
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- Method for producing tetrakis ( fluoroaryl) borate-magnesium compound
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Fluoroaryl magnesium halide is reacted with a boron compound so that a molar ratio of the fluoroaryl magnesium halide to the boron compound is not less than 3.0 and not more than 3.7, so as to produce a tetrakis (fluoroaryl) borate·magnesium compound. With this method, there occurs no hydrogen fluoride which corrodes a producing apparatus and requires troublesome waste water treatment.
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- Synergism in catalytic halogen-exchange fluorination of 4-chloronitro- and dichlorotetrafluorobenzenes
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Synergism was studied in catalytic halogen-exchange fluorination of 4-chloronitro- and dichlorotetrafluorobenzenes. The synergistic effect in the fluorination of chloroaromatic compounds with potassium fluoride was mainly attributed to separation of the activation functions of catalysts with respect to substrate molecules.
- Shipilov,Bykova,Elokhova,Igumnov
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p. 487 - 491
(2007/10/03)
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- Catalytic fluorination of hexachlorobenzene with supported potassium fluoride
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Fluorination of hexachlorobenzene with potassium fluoride supported on calcium fluoride or barium fluoride with using quaternary phosphonium salt as a phase-transfer catalyst was studied, and a synergism was observed.
- Shipilov,Fedoseev
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p. 556 - 557
(2007/10/03)
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- Reactivity of Negative Ions with Trifluoromethyl Halides
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The kinetics of the reactions of selected anions (A(-)) with the trifluoromethyl halides CF3X (X = F, Cl, Br, I) in the gas phase were measured at 300 K.Reaction rate constants and product branching fractions were determined using a selected ion flow tube (SIFT) instrument.The chosen anions were C5F5N(-), o-, m-, and p-CF3C6H4CN(-), C6F5Br(-), C6F5Cl(-), C6F5CF3(-), C6F5COCH3(-), Fe(-), FeCO(-), SF6(-), SO(-), SO2(-), NO(-), NO2(-), and NO3(-).The reactivity of these systems varies from unreactive to collisional, and a variety of reaction types was found.The results of our present and previous measurements on A(-) + CF3X reactions show that, in cases where nondissociative electron transfer (NDET) is energetically allowed, the total reactivity tends to be high, approaching collisional.This suggests that reactivity in these cases is initiated and controlled by electron transfer from the anion.In addition, association reactions tend to be preempted when NDET is energetically allowed.A few exceptions to these tendencies were found and are discussed.
- Morris, Robert A.,Viggiano, A. A.,Miller, Thomas M.,Seeley, John V.,Arnold, Susan T.,et al.
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p. 10641 - 10645
(2007/10/03)
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- Thermal electron attachment to C6F5X and C6H5X (X - I, Br, Cl, and F)
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Rate constants have been measured for thermal electron attachment to C6F5X (X = I, Br, Cl, F, and H) and C6H5X (X = I, Br, Cl, and F) at room temperature in N2 buffer gas (1-100 Torr) using the pulse-radiolysis microwave cavity method.For all the compounds studied, the rate constants are of the two-body type.Unexpectedly, the values for C6F5X except C6F5H are all the same (ca. 2 x 10-7 cm3 molecule-1 s-1), which are higher than most of the previous values, while that for C6F5H, measured in Xe and Ar buffer gases, is very low (7 x 10-12 cm3 molecule-1 s-1).For C6H5X, the value decreases dramatically with varying X from I to Br to Cl as 1.0 x 10-8 to 6.5 x 10-12 to 3 x 10-14 cm3 molecule-1 s-1, and that for C6H5F must be much lower than 10-13 cm3 molecule-1 s-1.These results for the magnitude of the rate constant are rationalized by the variation in the energy of a transient negative-ion state of each molecule, which results from a combination of the electron affinities of constituents (halogen atom X and C6F5 radical) and the strength of the C6F5-X (or C6H5-X) bond.
- Shimamori, Hiroshi,Tatsumi, Yoshitsugu,Suanagawa, Takeyoshi
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p. 7787 - 7792
(2007/10/02)
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- Thermolytic transformations of polyfluoroorganic compounds 30. Copyrolysis of α,α-dichlorooctafluoroethylbenzene with tetrafluoroethylene
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The reaction of α,α-dichlorooctafluorobenzene with tetrafluoroethylene as a source if difluorocarbene has been studied.The copyrolysis of these compounds gave not only the expected products, decafluoro-α-methylstyrene and α-chloroheptafluorostyrene, but also noticeable amounts of perfluoro-1-methylindan and perfluoro-7-methylbicyclonona-1,4,6-triene along with perfluoro-3-methylindene and octafluorostyrene.It has been suggested that indan and the triene are formed with the participation of the C6F5CClCF3 radical through sigmatropic shifts of fluorine atoms in the intermediate bicyclic compounds.The reaction of α,α-dichlorodecafluoropropylbenzene with tetrafluoroethylene afforded α-chloroheptafluorostyrene as the main product. - Key words: copyrolysis; decafluoro-α-methylstyrene, perfluoro-7-methylbicyclonona-1,4,6-triene; perfluoro-1-methylindan; polyfluoroalkylbenzyl radicals; sigmatropic shifts of fluorine atoms.
- Dvornikova, K. V.,Platonov, V. E.,Yakobson, G. G.
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p. 1690 - 1693
(2007/10/02)
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- INFRARED LASER INDUCED DECOMPOSITION OF HEXAFLUOROBENZENE AND SOME MONOSUBSTITUTED DERIVATIVES. INTERMEDIACY OF THE PENTAFLUOROPHENYL RADICAL.
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The infrared multiphoton laser induced reactions of hexafluorobenzene and related pentafluoro analogues (pentafluorobenzene, pentafluorochlorobenzene, pentafluorobromobenzene, and pentafluoroiodobenzene) have been investigated using a CO2 TEA laser.The study was carried out in order to define the decomposition products and to attempt to clarify their mode of formation.Thus, the products (relative yield, percent) of the irradiation of C6F6 (1027.3 cm-1; 0.73 J/cm2; 10 pulses; 25percent decomposition) were C2F4(64), C6F5CF3(28), C2F6(7), CF4(1) and that for C6F5H (949.4 cm-1; 0.80 J/cm2; 10 pulses; 25percent decomposition) was C2F4 and C6F5CF3.Increasing the number of pulses in the reaction with C6F6 decreased the amount of C2F4 and increased the amount of C6F5CF3 and C2F6 indicating secundary and tertiary reactions.Addition of halogen (X2, X = Cl, Br) to these reactions caused different products to be formed.Thus, the irradiation of a C6F6/Cl2 mixture (7.4/7 Torr; 1027.3 cm-1; 0.7 J/cm2; 35 pulses; 35percent reaction) afforded C6F5Cl(46); CF3Cl(24) and CF2Cl2(30).Irradiation of C6F5H/X2 mixtures afforded mainly C6F5X + HX.For example C6F5H/Br2 (10/40 Torr; 949.4 cm-1; 0.93 J/cm2; 10 pulses; 10percent reaction) gave C6F5Br and HBr exclusively.Irradiation of C6F5-X (X = Cl, Br, I) (977.2 cm-1; ca. 0.74 J/cm2; 200 pulses; 39-74percent reaction) gave C6F6 and a minor amount of decafluorobiphenyl , a radical combination product of the pentafluorophenyl radical (C6F5.).Increasing the fluence in these reactions gave similar products in most cases but in some instances increased the amount of C2F4 formed.The reactions and product distribution of the hydrogen substituted derivative (C6F5H) was examined in the presence of Br2 as a function of laser fluence and halogen concentration.It was found that the threshold for C6F5H decomposition was higher for the reaction involving Br2 (as compared with the reaction involving Cl2 or neat C6F5H).The presence of Br2 also decreased the amount of C6F5H that was decomposed, indicating a quenching process.The decomposition path with the lowest activation energie for these molecules is thought to be C6F5X -> C6F5. + X. and was accessible using a laser pulse with a fluence as low as 0.7 J/cm2.Using a higher laser fluence (ca. 1.2 J/cm2) di- and triatomic radicals were defined by spectroscopic identification of the and :CF2 species.These reactions are discussed in light of the formation of the C6F5. radical during a primary, laser induced, process.Subsequent decomposition to smaller fragments, combination with other radicals or scavenging by added reagents also takes place depending on the reaction conditions.
- Watanabe, Akio,Koga, Yoshinori,Sugawara, Ko-ichi,Takeo, Harutoshi,Fukuda, Kenzo,Matsumura, Chi
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p. 463 - 469
(2007/10/02)
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- REACTION OF TELLURIUM CHLORIDE PENTAFLUORIDE, TeF5Cl, WITH NITROGEN NUCLEOPHILES, PREPARATION AND CHARACTERIZATION OF THE ADDUCT (TeF4)2*NR2Cl, WHERE R=CH3, C2H5
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Reactions of TeF5Cl with the nitrogen nucleophiles LiN=C(CF3)2, ((CH3)3Si)2NH, and (CH3)3SiNR2, where R=CH3, C2H5, result in the reduction of the tellurium to Te(IV) and chlorination of the respective nucleophile.Analogous results are obtained in the reaction of TeF5Cl with (CH3)3SiCN, C6F5Li, and C6F5SLi.In the case of (CH3)3SiNR2, the new adducts (TeF4)2*NR2Cl are obtained in high yield.These compounds have been identified through their infrared, 1H, 19F, and 125Te NMR, and mass spectra as well as by elemental analysis.
- Thrasher, Joseph S.,Clark, Matthew,Morken, Peter A.
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p. 235 - 244
(2007/10/02)
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- Laser-Induced Reactions of Hexafluorobenzene and Selected Hydride Compounds
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Infrared-laser-induced reactions between C6F6 and general hydrides R-H (R = H, D, CH3, HCC, H2C=CH, and Cl) were studied by irradiating C6F6 at 1027 cm-1 in C6F6/R-H mixtures.In general, two competitive pathways involving C-F bond cleavage in C6F6 were observed as follows: (1) C6F6 + R-H C6F5H + R-F and (2) C6F6 + R-H C6F5R + HF.C6F6 decomposition also took place to a minor extent depending on the mole fraction of C6F6 and gave rise to C2F4 and C2H2.From infrared and GC/MS analysis of the product mixtures after 20-200 pulses, C6F5H was observed in all reactions except that involving D2.When D2 was used C6F5D was the major product.C6F5H was the major product in the reactions involving H2 and C2H2.In the reaction with C2H4, C6F5H was the major product derived from C6F6 though C2H2 was the major product of the reaction.The large amount of C2H2 seems to be derived from an additional sensitized decomposition of C2H4.C6F5H was present in minor amounts in the reaction with CH4 and HCl.Besides C6F5H, other monosubstituted products derived from C6F6 were also formed, generally within 20-100 pulses.Thus, C6F5CH3, C6F5CH=CH2, C6F5CCH, and C6F5Cl were produced, respectively, in the reaction of C6F6 with CH4, C2H4, C2H2, and HCl.In the first and last cases these products were the major ones observed.The results are discussed mechanistically in terms of the initial formation of the C6F5. radical and synthetically in terms of the utility of obtaining selective-laser-induced reduction of C6F6.
- Koga, Yoshinori,Chen, Ruth,Keehn, Philip M.
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p. 306 - 311
(2007/10/02)
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- Diazotization of pentafluoroaniline by means of anion-catalyzed phase transfer catalysis in a hydrophobic organic solvent
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Anion-catalyzed phase-transfer catalysis was successfully applied to diazotization of pentafluoroaniline in a dichloromethane-aqueous sulfuric acid two-phase system.The resulting diazonium group was coupled in situ with anisole, 1-methoxynaphthalene, and mesitylene, and replaced in situ with bromo, hydryl, and phenyl substituents under a two-phase condition.
- Iwamoto, Hidetoshi,Sonoda, Takaaki,Kobayashi, Hiroshi
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p. 535 - 537
(2007/10/02)
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- CW CO2 LASER-INDUCED HALOGEN EXCHANGE REACTION BETWEEN HEXAFLUOROBENZENE AND BORON TRICHLORIDE
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The halogen exchange reaction between hexafluorobenzene (HFB) and boron trichloride, BCl3 initiated by a continous-wave CO2 laser primarily affords chloropentafluorobenzene, C6F5Cl and dichlorofluoroborane, BCl2F.For the reaction initiation a number of rotational-vibrational lines of the vibrational 00deg1->10deg0 transition was used.With wavenumber radiation 977.21 cm-1 a faster V-V energy transfer between HFB and BCl3 molecules may occur.For this case the rate of the exchange reaction was observed to be by an order of magnitude higher compared to the reaction initiated by the laser radiation at 949.48 cm-1 and carried out under theidentical absorption conditions.
- Engst, Pavel,Horak, Milan,Pola, Josef
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p. 1314 - 1322
(2007/10/02)
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- LA FLUORATION PAR KF DE PERHALOGENES ORGANIQUES AROMATIQUES EN PRESENCE DE FAIBLES QUANTITES DE SULFOLANE OU D'EAU. SPECTRES DE MASSES DES MELANGES OBTENUS EN SERIE BENZENIQUE
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The fluorinations of perhalogenated aromatic compounds with KF are carried out in sealed tubes in presence of inert gas.The addition of small quantities of aprotic solvent promotes the fluorination of pentachloropyridine above 180 deg C; these fluorinatio
- Hitzke, J.
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p. 101 - 116
(2007/10/02)
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- LA FLUORATION DE L'HEXACHLOROBENZENE ET DE LA PENTACHLOROPYRIDINE EN MILIEU DE FLUORURE DE POTASSIUM SOLIDE
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The fluorinations of hexachlorobenzene and pentachloropyridine were carried out in sealed tubes with KF in presence of inert gas; the fluorinated derivatives C6FxCly x + y = 6 0 - are investigated and compared; the molar yield varied from 45percent to 90percent.It is possible to get directly and selectively some fluorinated drivatives as C5Cl2F3N.The fluorinations in liquid KF-KCl and solid KF are compared.
- Hitzke, J.
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p. 103 - 128
(2007/10/02)
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