- Some chemistry of difluorodiazine
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Difluorodiazine undergoes reaction with some sulfur oxides and sulfur and phosphorus fluorides and oxyfluorides. These reactions are characterized by fluorination or fluorination with oxygen elimination. The quantitative syntheses of difluoramidosulfuryl fluoride, FSO2NF2, and pentafluorosulfur difluoramine, SF5NF2, and a high yield preparation of sulfuryl bromide fluoride, FSO2Br, are given. The isomerization of trans-N2F2 was accomplished at a temperature lower than formerly described.
- Lustig, Max
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Read Online
- Chemoselective Hydro(Chloro)pentafluorosulfanylation of Diazo Compounds with Pentafluorosulfanyl Chloride
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Pentafluorosulfanyl chloride (SF5Cl) is the most prevalent reagent for the incorporation of SF5 group into organic compounds. However, the preparation of SF5Cl often relies on hazardous reagents and specialized apparatus. Herein, we described a safe and practical synthesis of a bench-stable and easy-to-handle solution of SF5Cl in n-hexane under gas-reagent-free conditions. The synthetic application of SF5Cl was demonstrated through the unprecedented reaction with diazo compounds. The chemoselective hydro- and chloropentafluorosulfanylations of α-diazo carbonyl compounds were developed in the presence of K3PO4 or copper catalyst, respectively. These reactions provide a direct and efficient access to various α-pentafluorosulfanyl carbonyl compounds of high value for potential applications.
- Qing, Feng-Ling,Shou, Jia-Yi,Xu, Xiu-Hua
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supporting information
p. 15271 - 15275
(2021/06/08)
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- Reductive photo-chemical separation of the hexafluorides of uranium and molybdenum
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Two new techniques are described for the separation of molybdenum hexafluoride (MoF6) from uranium hexafluoride (UF6). Both separation techniques utilize the differences displayed by the hexafluorides in their ability to absorb light in the near UV region. Because UF6 absorbs light in the near UV region and MoF6 does not, this observation was used to selectively reduce UF6 to uranium pentafluoride (UF5) through irradiation with 395 nm light in the presence of a suitable reducing agent. Two reducing agents were chosen for this study: gaseous, liquid, or super-critical carbon monoxide (CO) and liquid sulfur dioxide (SO2). Since MoF6 is not reduced under the reaction conditions described here, it may be removed via distillation from the uranium-containing sample after complete reduction of UF6 to solid UF5. The molybdenum- and uranium-containing samples were measured for purity through elemental analysis using microwave plasma atomic emission spectroscopy (MP-AES). Elemental analysis showed more than 98.8 % of the Mo had been removed from the U-containing samples. Further analyses of the samples were performed by X-ray powder diffraction and IR spectroscopy.
- Chemnitz, Tobias,Kraus, Florian,Petry, Winfried,Stene, Riane E.
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supporting information
(2020/10/18)
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- One-pot fluorosulfurylation of Grignard reagents using sulfuryl fluoride
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Herein, we report a new method for the one-pot syntheses of sulfonyl fluorides. Addition of an alkyl, aryl, or heteroaryl Grignard to a solution of sulfuryl fluoride at ambient temperature affords the desired sulfonyl fluorides in 18-78% yield. Furthermore, this method is applicable for in situ sequential reactions, whereby the Grignard reagent can be converted to the corresponding diarylsulfone, sulfonate ester, or sulfonamide in a one-pot process.
- Lee, Cayo,Ball, Nicholas D.,Sammis, Glenn M.
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p. 14753 - 14756
(2019/12/23)
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- Fluorine-containing sulfonyl compound as well as intermediate, preparation method and application thereof
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The invention discloses a fluorine-containing sulfonyl compound as well as an intermediate, a preparation method and application thereof. The fluorine-containing sulfonyl compound disclosed by the invention comprises positive ions and negative ions, wherein the positive ions are shown as the formula I. The fluorine-containing sulfonyl compound can react with substrates to effectively synthetize the fluorine-containing sulfonyl compound; the toxicity is low; the preparation is simple; the use is convenient; the fluorine-containing sulfonyl compound is in a solid stable state at normal temperature. In addition, the substrate applicability of the compound is extremely wide, and a phenol compound and an amine compound can be included; the fluorine-containing sulfonyl compound is a unique solidformation reagent capable of realizing the chemical conversion at present, so that important academic and application values are realized. The formula I is shown in the description.
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Paragraph 0149; 0150; 0151; 0152; 0153; 0154; 0155
(2018/05/24)
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- Novel synthetic route to perfluoroallyl cyanide (PFACN) reacting perfluoroallyl fluorosulfonate with cyanide
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A novel synthetic method for the preparation of perfluoroallyl cyanide CF2[dbnd]CFCF2CN (PFACN) is presented. This includes the addition – elimination reaction of cyanide anion with perfluoroallyl fluorosulfate CF2[dbnd]CF
- Tverdomed, Sergey N.,Hirschberg, Markus E.,Pajkert, Romana,Hintzer, Klaus,R?schenthaler, Gerd-Volker
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- Merging [2+2] Cycloaddition with Radical 1,4-Addition: Metal-Free Access to Functionalized Cyclobuta[a]naphthalen-4-ols
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A metal-free [2+2] cycloaddition and 1,4-addition sequence induced by S-centered radicals has been achieved by treating benzene-linked allene-ynes with aryldiazonium tetrafluoroborates and DABCO-bis(sulfur dioxide) in a one-pot procedure. The reaction provides a greener and more practical access to functionalized cyclobuta[a]naphthalen-4-ols with valuable applications. More than 50 examples are demonstrated with excellent diastereoselectivity and chemical yields. The reaction pathway is proposed to proceed by the following steps:[2+2] cycloaddition, insertion of SO2, 1,4-addition, diazotization, and tautomerization.
- Liu, Feng,Wang, Jia-Yin,Zhou, Peng,Li, Guigen,Hao, Wen-Juan,Tu, Shu-Jiang,Jiang, Bo
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supporting information
p. 15570 - 15574
(2017/12/02)
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- Ex situ generation of sulfuryl fluoride for the synthesis of aryl fluorosulfates
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A convenient transformation of phenols into the corresponding aryl fluorosulfates is presented: the first protocol to completely circumvent direct handling of gaseous sulfuryl fluoride (SO2F2). The proposed method employs 1,1'-sulfonyldiimidazole as a precursor to generate near-stoichiometric amounts of SO2F2 gas using a two-chamber reactor. With NMR studies, it was shown that this ex situ gas evolution is extremely rapid, and a variety of phenols and hydroxylated heteroarenes were fluorosulfated in good to excellent yields.
- Veryser, Cedrick,Demaerel, Joachim,Bieliunas, Vidmantas,Gilles, Philippe,De Borggraeve, Wim M.
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supporting information
p. 5244 - 5247
(2017/11/06)
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- Multidimensional SuFEx Click Chemistry: Sequential Sulfur(VI) Fluoride Exchange Connections of Diverse Modules Launched From An SOF4 Hub
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Sulfur(VI) fluoride exchange (SuFEx) is a new family of click chemistry based transformations that enable the synthesis of covalently linked modules via SVI hubs. Here we report thionyl tetrafluoride (SOF4) as the first multidimensional SuFEx connector. SOF4 sits between the commercially mass-produced gases SF6 and SO2F2, and like them, is readily synthesized on scale. Under SuFEx catalysis conditions, SOF4 reliably seeks out primary amino groups [R-NH2] and becomes permanently anchored via a tetrahedral iminosulfur(VI) link: R?N=(O=)S(F)2. The pendant, prochiral difluoride groups R?N=(O=)SF2, in turn, offer two further SuFExable handles, which can be sequentially exchanged to create 3-dimensional covalent departure vectors from the tetrahedral sulfur(VI) hub.
- Li, Suhua,Wu, Peng,Moses, John E.,Sharpless, K. Barry
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supporting information
p. 2903 - 2908
(2017/03/13)
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- Ion chemistry of sulfuryl fluoride: An experimental and theoretical study on gas-phase reactions involving neutral and ionized SO2F2
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The gas phase ion chemistry of sulfuryl fluoride is studied by ion trap mass spectrometry and ab initio calculations. Reactions of ions of atmospheric relevance with neutral SO2F2 mainly result in SO 2F2 depletion by dissociative electron transfer. In few cases, a different reaction mechanism involving F-abstraction is invoked, since dissociative ion products are observed despite the electron transfer channel being endothermic. Ab initio calculations revealed a nearly perfect distonic structure for the molecular SO2F2+ ion, whose capability of activating strong HX bonds (X = C, N, O) is ascribable to the high spin density located on the oxygen atoms, in line with literature reports. Among the ions produced by electron ionization of SO2F2, the FSOx+ (x = 0-2) ions are capable of activating the HNH2 bond of ammonia. Theoretical investigation revealed that NH 3 activation by SF+ requires a triplet to singlet conversion along the reaction pathway. This conversion is expected to be fast, the conceivable reaction rate determining step being the subsequent intramolecular hydrogen migration.
- Antoniotti, Paola,Benzi, Paola,Operti, Lorenza,Rabezzana, Roberto,Borocci, Stefano,Giordani, Maria,Grandinetti, Felice
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- Thermally persistent fluorosulfonyl nitrene and unexpected formation of the fluorosulfonyl radical
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Thermally persistent triplet sulfonyl nitrene, FSO2N, was produced in the gas phase in high yields (up to 66%) by flash vacuum pyrolysis of FSO2N3. Surprisingly, no rearrangement of FSO 2N was observed, but the
- Zeng, Xiaoqing,Beckers, Helmut,Willner, Helge
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p. 2096 - 2099
(2013/04/23)
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- Ag3(SO3F)4: A rare example of a mixed-valent AgII/AgI compound showing 1D antiferromagnetism
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Dark brown AgI2AgII(SO3F) 4, known for over 30 years, is the first known example of four well-characterized mixed-valent (1+/2+) compounds of silver. It crystallizes in the monoclinic space group, P21/c, with a = 5.33670(19) A, b = 12.9486(4) A, c = 19.5976(7) A, β = 100.6407(13)°, V = 1330.95(8) A3, Z = 4 and dcalcd. = 3.59 gcm -3. Its chemical formula is best written as [AgI 2(SO3F)]+[AgII(SO3F) 3]-. AgII centres form 1D chains linked through OSO bridges that result in pronounced antiferromagnetic coupling with T N = 225 K and a superexchange coupling constant (J) of -7.5 meV per pair of coupled AgII cations. Ligand environments around Ag I and AgII differ substantially, which suggests a genuine mixed- (i.e., localized) and not intermediate-valent (i.e., delocalized) character of the title compound. Indeed, electronic absorption is not observed up to 7500 cm-1, so the intervalence charge-transfer transition across the electronic band gap must fall above 0.8 eV. The compound is stable up to a mere 75 °C, which marks the onset of its thermal decomposition to AgISO3F and the SO3F′· radical. AgI2AgII(SO3F)4 is, after AgSO4, the second-known 1D antiferromagnetic semiconducting oxa derivative of AgII. Dark brown monoclinic Ag3(SO 3F)4 shows 1D antiferromagnetism with an anomalously large superexchange coupling constant of -7.5 meV per pair of paramagnetic Ag II cations (for the spin density see the figure). One-dimensional [AgIISO3F]+ chains, linked through fluorosulfate anions into [AgII(SO3F)3] - sheets, constitute characteristic structural features responsible for magnetic behaviour.
- Michalowski, Tomasz,Malinowski, Przemyslaw J.,Derzsi, Mariana,Mazej, Zoran,Jaglicic, Zvonko,Leszczyanski, Piotr J.,Grochala, Wojciech
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p. 2508 - 2516
(2011/08/22)
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- Silver(II) fluorosulfate: A thermally fragile ferromagnetic derivative of divalent silver in an oxa-ligand environment
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Several synthetic pathways and characterization of silver(II) fluorosulfate are reported. The title compound crystallizes in the monoclinic space group, P21/c, with a = 10.5130(4) A, b = 7.7524(3) A, c = 8.9366(4) A, β = 117.867(2)° [V = 643.88(5) A3, Z = 4, dcalcd. = 3.15 gcm-3] in a structure type related to that of AgF2. Puckered [Ag(SO3F)2] sheets are present in the crystal structure with two oxygen atoms of the fluorosulfate anions utilized for bonding within the sheet; the third oxygen atom serves as a linker to the adjacent sheet. Terminal fluorine atoms form small cavities in the structure. The S-O stretching region of the vibrational (IR and Raman) spectra is rich in bands, thus confirming the structural complexity of Ag(SO 3F)2. Ag(SO3F)2 is a soft ferromagnet with a Curie temperature of 24.8 K and it shows a single broad electron spin resonance (ESR) with g = 2.183 at T = 293 K. The intrasheet magnetic superexchange constant, J, derived from magnetization measurements, equals +1.0 meV per formula unit. Density functional theory calculations suggest that the superexchange occurs through the OO moiety of the Ag-O-S-O-Ag bridge while omitting the S atom, and the yield is J = +1.1 meV. The Coulomb-corrected local spin density approximation (LSDA+U) calculations predict a direct electronic band gap at the Fermi level of 1.05 eV. Large magnetic moments reside on O atoms attached to AgII; in consequence, Ag(SO 3F)2 is thermally unstable; at room temperature or in the presence of strong acids its dark brown crystals slowly decompose at the surface to a black mixed-valence Ag3(SO3F)4. Very fast exothermic decomposition of Ag(SO3F)2 with emission of a fluorosulfuryl radical (SO3F′·) occurs above 120 °C as confirmed by simultaneous thermogravimetric, calorimetric and evolved gas analyses. Ag(SO3F)2 exhibits a puckered sheet structure and it shows 2D ferromagnetism below 25 K; DFT methods predict it to be a magnetic semiconductor with the band gap at the Fermi level of approximately 1.05 eV.Magnetic superexchange take place through the OO moiety of the structural O-S-O bridge while omitting the sulfur atom, similarly as for related AgSO4.
- Malinowski, Przemyslaw J.,Derzsi, Mariana,Mazej, Zoran,Jaglicic, Zvonko,Leszczyanski, Piotr J.,Michalowski, Tomasz,Grochala, Wojciech
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p. 2499 - 2507
(2011/08/22)
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- POTASSIUM PERFLUOROALKANESULFONATES AND PROCESS FOR PRODUCTION THEREOF
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A process for the production of potassium perfluoroalkane- sulfonates which comprises the electrolytic fluorination step of electrofluorinating an alkanesulfonyl halide in anhydrous hydrofluoric acid to obtain a gas containing a perfluoro- alkanesulfonyl fluoride as the main component. The process may further comprise the gas absorption step of reacting the gas with an aqueous solution of potassium hydroxide to form a solution containing a potassium perfluoroalkanesulfonate, the purification step of removing contaminant potassium fluoride, potassium hydroxide and potassium sulfate from the solution, and the concentration/recovery step of subjecting the purified aqueous solution to concentration and drying. In the electrolytic fluorination, the formation of by-products can be inhibited by keeping the proton concentration of the electrolytic solution within the range of 150 to 1500ppm.
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Page/Page column 17
(2008/06/13)
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- Microwave, millimeterwave, and high-resolution FTIR study of the ν2=1 state of SO2F2
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Microwave and millimeterwave spectra of SO2F2 in The v2=1 state up to 450 GHz have been assigned and 174 pure rotational lines measured. The high-resolution infrared spectrum of the ν2 band (νsym SF2) centered at 849.5 cm-1 has been recorded with a resolution of 0.0024 cm-1. About 1900 rovibrational transitions with ΔKa=0 and ±2 have been assigned. Rotational and rovibrational data have been combined, and excited state parameters up to sextic centrifugal distortion constants have been obtained using a Watson type Hamiltonian in S-reduction. No perturbation has been observed, although weak B-type Coriolis interactions with ν8 may be deduced from the effective state parameters.
- Merke,Heineking,Hegelund,Demaison,Margulès,Bürger
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p. 185 - 189
(2007/10/03)
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- Method of producing acid fluorides from acid chlorides
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Acid fluorides, for example carboxylic acid fluorides and sulfuryl fluoride are produced by reacting the corresponding acid chlorides with hydrogen fluoride adducts of ammonium fluoride or amine hydrofluorides (which act as a catalyst or as a fluorination agent). Consumed HF adducts may be regenerated with HF.
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Page column 8
(2008/06/13)
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- SUBSTANTIALLY FLUORINATED IONOMERS
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This invention concerns ionomers comprising monomer units of vinylidene fluoride and monomer units of perfluorovinyl ethers having pendant groups containing fluoroalkyl sulfonyl methide or fluoroalkyl sulfonyl imide derivatives and univalent metal salts thereof, and with the uses of said ionomers in eledrochemical applications, electrochemical capacitors and modified electrodes.
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- Microwave, millimeter-wave, and high-resolution FTIR study of SO2F2: The v3, v7, v9 triad at 550 cm-1
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The high-resolution infrared spectrum of the v3 (A1), v7 (B1), and v9 (B2) bands of SO2F2 at 551.6, 544.1, and 539.1 cm-1, respectively, has been recorded with a resolution of 0.0026 cm-1. Ca. 5500 transitions of this triad with ΔKa = 0, ±1 have been assigned. Microwave and millimeter-wave spectra up to 450 GHz of the v3 = 1, v7 = 1, and v9 = 1 states have been recorded and 499 pure rotational transitions in the triad states have been measured. Rotational and rovibrational data have been analyzed simultaneously with a model taking into account Coriolis interactions within the triad. In the fit the first order Coriolis resonance parameters were constrained to values from a scaled ab initio force field calculated in this work. Excited state parameters for the triad states up to octic centrifugal distortion constants have been obtained using the Watson Hamiltonian in S-reduction.
- Bürger,Demaison,Hegelund,Margulès,Merke
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p. 133 - 141
(2007/10/03)
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- Quantitative infrared spectroscopic analysis of SF6 decomposition products obtained by electrical partial discharges and sparks using PLS-calibrations
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Infrared spectroscopy is a powerful tool for the analysis of gaseous by-products in sulfur hexafluoride gas used as an insulator in high-voltage equipment. Sparks and electrical partial discharges were generated between different point-plane configurations within a custom-made discharge chamber constructed from stainless steel and Teflon. Various electrode materials were used such as stainless steel, copper, aluminium, silver, tungsten and tungsten/copper alloy. Owing to the different electrical conditions, a wide concentration range of the decomposition products existed. The main-products found were the sulfuroxyfluorides SOF4 and SOF2, as well as HF following experiments with partial discharges and sparking with energies around 1.0 J/spark. All infrared spectra were recorded using an FTIR-spectrometer equipped with a 10 cm gas cell. Quantification was carried out using classical least-squares and partial least-squares (PLS) with multivariate spectral data from selected intervals. PLS calibration models were also optimised under the constraint of a minimum number of spectral variables with a view to developing simple photometers based on a restricted number of laser wavelengths. Standard errors of prediction obtained by cross-validation of different PLS calibration models are reported for the compounds mentioned, as well as for SF4, SO2F2 and SiF4.
- Kurte,Heise,Klockow
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p. 505 - 513
(2007/10/03)
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- Process for the synthesis of fluorinated alkyl sulphonyl halides
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Preparation of fluorinated alkyl sulphonyl halides having the general formula: STR1 where RIf is fluorinated alkyl group and RIIf is a fluorinated alkyl group or fluorine, X is a halogen atom, and Y is a proton, a halogen atom, or a fluorinated alkyl groups, by reaction of a corresponding fluorinated unsaturated hydrocarbon with sulphuryl halide, wherein the reaction is carried out in the presence of at least catalytic amounts of a fluoride in a solvent comprising compounds having one or more SO and/or SO2 groups incorporated in the compound structure.
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- Process for preparing fluorinated beta-sultones
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A process allows the preparation of a fluorinated beta-sultone by reacting a fluorinated olefin with oleum.
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- Process for the synthesis of fluorinated alkyl sulphonyl halides
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For the preparation of fluorinated alkyl sulphonyl halides having the general formula: where RIfis fluorinated alkyl group and RIIfis a fluorinated alkyl group or fluorine, X is a halogen atom, and Y is a proton, a halogen atom, or a fluorinated alkyl groups,???by reaction of a corresponding fluorinated unsaturated hydrocarbon with sulphuryl halide, wherein the reaction is carried out in the presence of at least catalytic amounts of a fluoride in a solvent comprising compounds having one or more SO and/or SO2groups incorporated in the compound structure.
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- The preparation and characterization of SeCl3SbF6, improved syntheses of MCl3(As/Sb)F6 (M = S, Se), and the X-ray crystal structure determination of SeCl3AsF6 and a new phase of SBr3SbF6
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Alternative and, in some cases, improved syntheses of the salts MX3(As/Sb)F6 (M = S, Se) and SCl3(SbCl6/AlCl4) are described. In addition, the synthesis of SeCl3SbF6 is reported. The compounds were characterized by FT-Raman spectroscopy and the X-ray crystal structures of SeCl3AsF6 (also 77Se NMR)and a new phase of SBr3SbF6 were determined. Crystals of SeCl3AsF6 and SBr3SbF6 are monoclinic, space group P21/c with [values for SBr3SbF6 in brackets] a = 7.678(1) [8.137(1)] A, b = 9.380(3) [9.583(2)] A, c = 11.920(3) [12.447(2)] A, β = 98.19(2)° [97.36(1)]°, V = 849.72(3) [962.6(3)] A3, z = 4, Dx = 2.925 [3.502] Mg m-3, R = 0.0525 [0.055], and Rw = 0.0554 [0.060] for 1151 [1472] observed reflections.
- Passmore, Jack,Cameron, T. Stanley,Boyle, Paul D.,Schatte, Gabriele,Way, Todd
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p. 1671 - 1681
(2007/10/03)
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- Low temperature fluorination of some non-metals and non-metal compounds with fluorine
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Low temperature fluorination with elemental fluorine of elemental phosphorus, sulphur, silicon, amorphous carbon and phosphorus trichloride, phosphorus pentoxide, triphenylphosphine, hexafluorodisilane, hexachlorodisilane, hexabromodisilane, tetrasulphur tetranitride, sulphur dioxide, thionyl chloride and sulphuryl chloride has been carried out in freon-11 medium.The corresponding fluoro compounds have been isolated in near quanititative yields, purified by low temperature fractional condensation and characterised by IR spectroscopy and elemental analysis.
- Padma, D K,Kalbandkeri, R G,Suresh, B S,Bhat, V Subrahmanya
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p. 172 - 176
(2007/10/02)
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- Process for the preparation of fluorinated benzene sulfonyl fluorides
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The present invention relates to a process for the preparation of a fluorinated benzene sulfonyl fluoride comprising the step of: heating a benzene sulfonyl fluoride of the Formula (I) STR1 where Y is fluorine, chlorine, bromine, iodine, a methyl group, an ethyl group, or a propyl group; p is 0 to 3; and q is 2 to 6, in the presence of an alkali metal fluoride under conditions and for a time sufficient to provide a fluorinated benzene sulfonyl fluoride of the Formula (II) STR2 where x is 1 to 5; m=q-x; and Y and p are as defined above. The present invention also provides novel benzene sulfonyl fluorides of the Formula (III) STR3 where each Y is meta or para to --SO2 F and is independently selected from the group consisting of chlorine, fluorine, fluorosulfonyl, methyl group, ethyl group, and propyl group; and p is 1 or 2. The fluorinated benzene sulfonyl fluorides are versatile fluorinated intermediates. They are readily converted to sulfonamides of potential activity, or the sulfonyl group can be converted into another functional group, or removed to provide fluorinated benzenes.
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- Herbicidal heterocyclic sulfonamides
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Substituted heterocyclic sulfonamides having herbicidal activity and agriculturally useful compositions comprising such compounds.
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- Chemically reactive dipyrrometheneboron difluoride dyes
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Novel fluorescent dyes based on the dipyrrometheneboron difluoride structure are provided. The new reagents contain functional groups capable of forming a stable fluorescent product with functional groups typically found in biomolecules or polymers including amines, phenols, thiols, acids, aldehydes and ketones. Reactive groups in the dipyrrometheneboron difluoride dyes include activated esters, isocyanates, amines, hydrazines, sulfonyl halides, acids, aldehydes, alcohols and haloacetamides. The products are detected by their absorbance or fluorescence properties. The spectral properties of the fluorescent dyes are sufficiently similar in wavelengths and intensity to fluorescein as to permit use of the same euqipment. The dyes, however, have narrower spectral bandwidths than fluorescein, do not show appreciable sensitivity to pH, have higher solubility in non-polar solvents and have improved photostability.
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- Gas-phase hydrolysis of SOF2 and SOF4
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The rates for gas-phase hydrolysis of SOF2 (thionylfluoride) and SOF4 (thionyl tetrafluoride) have been measured at a temperature of 298 K.The second order rate constant for SOF2 hydrolysis in SF6 buffer gas was found to have the value (1.2 +/- 0.3)*10-23 cm3/s which agrees with previous estimates of Sauers et al., but is three orders of magnitude lower than the value obtained by Rueegsegger et al. at 340 K.The rate constant for SOF4 hydrolysis has not previously been measured and its value in both SF6 and N2 buffer gases was found here to be (1.0 +/- 0.3)*10-21 cm3/s.
- Brunt, R. J. Van,Sauers, I.
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p. 4377 - 4380
(2007/10/02)
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- Thorium(IV) Fluorosulphate
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Th(SO4F)4, >, has been prepared by the action of H2SO4F on Th(O2CCH3)4,.The i.r. spectrum indicates bidentate nature of SO3F groups.It forms adducts with pyridine (Py), quinoline (Q), dimethylsulphoxide (DMSO), triphenylphosphineoxide (TPPO) and bipyridyl (Bipy) of the compositions, A* 2Py, A* 2Q, A * 2DMSO, A* 2TPPO and A* Bipy respectively.SO2F groups in these complexes are also bidante as shown by their i.r. spectra.Th(SO3F)4 decomposes thermally in a single step with evolution of SO2F2 and formation of Th(SO4)2.
- Paul, R. C.,Singh, Sukhjinder,Verma, R. D.
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- Gas Phase Fluorination of CO2 by SF6
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Quantitative fluorination of CO2 to CF2O is achieved by laser induced breakdown in SF6-CO2 mixtures.
- Malatesta, Vincenzo,Hackett, Peter A.,Willis, Clive
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p. 247 - 248
(2007/10/02)
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- The reaction of fluorosulfuryl isocyanate with alkali metal fluorides
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Fluorosulfuryl isocyanate reacts with cesium, potassium, and sodium fluorides in acetonitrile solvent at 25° to form stable, solid adducts having a molar ratio FSO2NCO: MF close to 1:1. Chemical and physical evidence indicates that these compounds may be formulated as the salts of fluoroformylfluorosulfurylimide, M+[N(SO2F)C(O)F]-.
- Roderiguez, Joseph A.,Noftle, Ronald E.
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p. 1874 - 1877
(2008/10/08)
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- Chlorine monofluoride. Reactions with sulfur oxides
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The reactions of ClF with SOF2, SO2, and SO3 are reported. These reactions produce SOF4, ClSO2F, and ClOSO2F, respectively, in excellent yields. New characterization data for ClOSO2/s
- Schack, Carl J.,Wilson, Richard D.
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p. 311 - 314
(2008/10/08)
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- The reaction of dioxygen difluoride and sulfur dioxide. Transfer of the OOF group
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The reaction of dioxygen difluoride with sulfur dioxide produces mainly sulfuryl fluoride and lesser amounts of pyrosulfuryl fluoride and fluorosulfuryl hypofluorite. The mechanism of this reaction was studied using O17-tracer techniques and O17 nmr measurements. It was concluded that the sulfuryl fluoride is formed by a simple fluorination reaction. The pyrosulfuryl fluoride is formed via an FSO3· intermediate, which results in scrambling. It was concluded that fluorosulfuryl hypofluorite results via an OOF intermediate.
- Solomon, Irvine J.,Kacmarek, Andrew J.,Raney, Jack
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p. 1221 - 1224
(2008/10/08)
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- N-haliminosulfur derivatives
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The compounds O=SF2=NCl, O=SF2=NF, and SF2=NCl were prepared by the catalytic halogenation of the corresponding N-fluoroformyl derivatives, O=SF2=NCOF and SF2=NCOF. Some properties of these compounds are discussed.
- Ruff, John K.
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p. 1787 - 1791
(2007/10/12)
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- Some reactions of pentafluorosulfur hypofluorite and trifluoromethyl hypofluorite
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The reaction of peutafluorosulfur hypofluorite with sulfur dioxide in the liquid phase gives SF5OSO2F. Pentafluorosulfur hypofluorite reacts with sulfur tetrafluoride to give SF5OSF5, SF5OOSF5, and SF5OSF4OSF5, while a similar reaction in the presence of oxygen gives SF5OSF4OOSF5 and SF5OSF4OOSF4OSF5 as additional products. These new peroxides react with benzene to give C6H5OSF4OSF5. The reaction of trifluoromethyl hypofluorite with sulfur tetrafluoride gives CF3OSF5 as the only product. Trifluoromethyl hypofluorite, sulfur tetrafluoride, and oxygen react to give CF3OSF4OSF5, CF3OSF4OOSF5, and a compound believed to be CF3OSF4OOSF4OCF3. A reaction scheme which accounts for these products is proposed.
- Pass,Roberts
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p. 1016 - 1019
(2008/10/08)
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