355-42-0Relevant academic research and scientific papers
THE CHEMISTRY OF DIACYL PEROXIDES - VIII. THE REACTIONS BETWEEN POLYFLUORODIACYL PEROXIDES AND 2-NITRO-2-NITROSOPROPANE--GENERATION OF BIS(POLYFLUOROALKYL) NITROXIDES
Zhao, Cheng-Xue,Chen, Guo-Fei,Jiang, Xi-Kui,Wang, Xian-Shan
, p. 597 - 606 (1987)
Thermal decomposition of 2-nitro-2-nitrosopropane (4) in F113 (CCl2F-CClF2) solution involves C-NO bond fission and forms acetone as the major product.In the presence of polyfluorodiacyl peroxide (3), the oxidation of 4 by 3 to 2,2-dinitropropane (5) is the predominant reaction and bis(polyfluoroalkyl) nitroxide (1) is generated as one of the by-products.
Synthesis method of straight-chain perfluoroalkanes
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Paragraph 0018; 0019; 0027, (2019/05/08)
The invention relates to a synthesis method of straight-chain perfluoroalkanes, which comprises the following steps: reaction of perfluoroalkyl iodine with alcohol solution of sodium alcohol at a certain temperature to purify 1-hydroperfluoroalkanes; reaction of 1-hydroperfluoroalkanes with fluorine gas at a certain temperature to purify straight-chain perfluoroalkanes. The synthesis method of theinvention has mild reaction conditions, high product yield, and is beneficial to cost saving. The process has low energy consumption, easy operation and is conducive to industrial production.
A preparation method of the whole fluorine hexanone (by machine translation)
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Paragraph 0025; 0026; 0027; 0028, (2019/01/04)
The invention discloses a full-fluorine hexanone preparation method, the method to hexafluoropropylene as raw materials, in alkyl formamine villaumite presence, through oxygen oxidizing part of the hexafluoropropylene generating hexafluoropropene, hexafluoropropylene oxide in the aminopyridine resin solid alkali under the action of the acylation reaction produce the full fluorine propionyl fluoride, then full fluorination coins with unreacted hexafluoropropylene in catalytic condensation under the fluorine ions to prepare the full fluorine hexanone, the above reaction is performed in a reactor are in the pipeline. The technology of the invention low cost, reaction selectivity and high yield, high purity of the product, after treatment is simple, pollution-free, is a green synthesis process. Suited to large-scale production of clean production technology. (by machine translation)
Decomposition characteristics of C5F10O/air mixture as substitutes for SF6 to reduce global warming
Li, Yi,Zhang, Xiaoxing,Xiao, Song,Chen, Qi,Wang, Dibo
, p. 65 - 72 (2018/02/14)
Sulfur hexafluoride (SF6) is widely used in the power industry but is a serious greenhouse gas. Many researchers committed to achieving sustainable development of the power industry are finding alternatives to SF6 gas. C5F10O performs well in terms of environmental protection, insulation, and safety and is a potential environment-friendly alternative gas. In this paper, the insulation and decomposition characteristics of C5F10O/air gas mixture were examined using gas-insulation performance test platform, and decomposition products were detected by gas chromatography–mass spectrometry. The formation mechanism and distribution of C5F10O decomposition products were analyzed through reactive molecular dynamics method and density functional theory. The influence of air on the decomposition of C5F10O was also evaluated. Results showed that the decomposition of C5F10O/air gas mixture mainly produces CF3[rad], C3F7[rad], C4F7O[rad], CO, CF2[rad], CF[rad], F[rad] and CF4. The breakdown voltage of C5F10O/air gas mixture decreased slightly after repeated breakdown tests, and CF4, C2F6, C3F8, C3F6, C4F10, CF2O were detected. These results can serve as a reference for the systematic comprehension of the decomposition characteristics of C5F10O/air gas mixture and for related engineering applications.
Preparation method for perfluoroalkane
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Paragraph 0026; 0027, (2016/11/28)
The invention discloses a preparation method for perfluoroalkane. The preparation method comprises the following steps: adding a fluorination reagent into a reaction vessel, stirring the fluorination reagent at room temperature, introducing fluorine-nitrogen gas mixture into the reaction vessel for activation of the fluorination reagent and continuing stirring for half an hour, wherein the concentration of fluorine gas in the fluorine-nitrogen gas mixture is 0.5 to 10%, and the molar weight of the fluorine-nitrogen gas mixture is 1 to 5% of the molar weight of the fluorination reagent; after completion of stirring, relieving residual pressure in the reaction vessel, and adding perfluoroalkyl halide and a solvent into the reaction vessel for a reaction at 150 to 200 DEG C for 5 to 10 h, wherein a mol ratio of perfluoroalkyl halide to the fluorination reagent is (1: 1) to (1: 2), and a mol ratio of perfluoroalkyl halide to the solvent is (1: 5) to (1: 15); and after a reaction product is obtained upon completion of the reaction, cooling the reaction product to room temperature and distilling the reaction product to obtain perfluoroalkane. The method provided by the invention has the advantages of simple equipment, high operation security, etc.
A convenient and practical method for the selective preparation of deuterofluorocarbons
Richardson, David P.,Bauer, Gordon S.,Bravo, Andrew A.,Drzyzga, Michael,Motazedi, Tina,Pelegri-O'Day, Emma M.,Poudyal, Shirish,Suess, Daniel L.M.,Thoman, John W.
, p. 208 - 215 (2015/11/02)
A detailed study of the development of efficient and practical conditions for the selective synthesis of 1-deuterononafluorobutane from 1-iodononafluorobutane is reported. The optimal conditions involve treatment of the iodo-precursor in D2O at ～170 °C in the presence of metallic zinc in a sealed Schlenk tube to give a 59% yield of 1-deutero-1,1,2,2,3,3,4,4,4-nonafluorobutane. The same method was applied successfully to two higher homologues to produce 1-deutero-1,1,2,2,3,3,4,4,5,5,5-undecafluoropentane and 1-deutero-1,1,2,2,3,3,4,4,5,5,6,6,6-tridecafluorohexane in yields of 64% and 56%, respectively. Surprisingly, even the non-perfluorinated product 6-deutero-1,1,1,2,2,3,3,4,4-nonafluorohexane could be synthesized in 69% yield with this method.
Study of liquid-phase photolysis of perfluorinated ketones
Starobin,Berenblit,Lebedev,Gubanov
body text, p. 1046 - 1051 (2011/09/12)
Liquid-phase photolysis of perfluorinated ketones under UV irradiation was examined.
Explored routes to unknown polyfluoroorganyliodine hexafluorides, R FIF6
Frohn, Hermann-Josef,Bardin, Vadim V.
experimental part, p. 1000 - 1006 (2010/11/16)
Two routes to RFIF6 compounds were investigated: (a) the substitution of F by RF in IF7 and (b) the fluorine addition to iodine in RFIF4 precursors. For route (a) the reagents C6F5SiMe3, C6F 5SiF3, [NMe4][C6F 5SiF4], C6F5BF2, and 1,4-C6F4(BF2)2 were tested. C 6F5IF4 and CF3CH2IF 4 were used in route (b) and treated with the fluoro-oxidizers IF7, [O2][SbF6]/KF, and K2[NiF 6]/KF. The observed sidestep reactions in case of routes (a) and (b) are discussed. Interaction of C6F5SiX3 (X = Me, F), C6F5BF2, 1,4-C6F 4(BF2)2 with IF7 gave exclusively the corresponding ring fluorination products, perfluorinated cyclohexadiene and cyclohexene derivatives, whereas [NMe4][C6F 5SiF4] and IF7 formed mixtures of C 6FnIF4 and C6FnH compounds (n = 7 and 9). CF3CH2IF4 was not reactive towards the fluoro-oxidizer IF7, whereas C6F 5IF4 formed C6FnIF4 compounds (n = 7 and 9). C6F5IF4 and CF 3CH2IF4 were inert towards [O 2][SbF6] in anhydrous HF. CF3CH 2IF4 underwent C-H fluorination and C-I bond cleavage when treated with K2[NiF6]/KF in HF. The fluorine addition property of IF7 was independently demonstrated in case of perfluorohexenes. C4F9CFCF2 and IF7 underwent oxidative fluorine addition at -30 °C, and the isomers (CF 3)2CFCFCFCF3 (cis and trans) formed very slowly perfluoroisohexanes even at 25 °C. The compatibility of IF7 and selected organic solvents was investigated. The polyfluoroalkanes CF 3CH2CHF2 (PFP), CF3CH 2CF2CH3 (PFB), and C4F9Br are inert towards iodine heptafluoride at 25 °C while CF3CH 2Br was slowly converted to CF3CH2F. Especially PFP and PFB are new suitable organic solvents for IF7.
Bis(perfluoroorganyl)bromonium salts [(RF)2Br]Y (RF = aryl, alkenyl, and alkynyl)
Frohn, Hermann-Josef,Giesen, Matthias,Welting, Dirk,Bardin, Vadim V.
experimental part, p. 922 - 932 (2010/10/03)
Bromonium salts [(RF)2Br]Y with perfluorinated groups RFC6F5, CF3CFCF, C 2F5CFCF, and CF3C≡C were isolated from reactions of BrF3 with RFBF2 in weakly coordinating solvents (wcs) like CF3CH2CHF2 (PFP) or CF3CH2CF2CH3 (PFB) in 30-90% yields. C6F5BF2 formed independent of the stoichiometry only [(C6F5)2Br][BF 4]. 1:2 reactions of BrF3 and silanes C6F 5SiY3 (Y = F, Me) ended with different products - C 6F5BrF2 or [(C6F5) 2Br][SiF5] - as pure individuals, depending on Y and on the reaction temperature (Y = F). With C6F5SiF3 at ≥-30 °C [(C6F5)2Br][SiF5] resulted in 92% yield whereas the reaction with less Lewis acidic C 6F5SiMe3 only led to C6F 5BrF2 (58%). The interaction of K[C6F 5BF3] with BrF3 or [BrF2][SbF 6] in anhydrous HF gave [(C6F5) 2Br][SbF6]. Attempts to obtain a bis(perfluoroalkyl) bromonium salt by reactions of C6F13BF2 with BrF3 or of K[C6F13BF3] with [BrF2][SbF6] failed. The 3:2 reactions of BrF3 with (C6F5)3B in CH2Cl2 gave [(C6F5)2Br][(C6F 5)nBF4-n] salts (n = 0-3). The mixture of anions could be converted to pure [BF4]- salts by treatment with BF3·base.
New types of asymmetrical bromonium salts [RF(R F′)Br]Y where RF and/or RF′ represent perfluorinated aryl, alkenyl, and alkynyl groups
Frohn, Hermann-Josef,Giesen, Matthias,Bardin, Vadim V.
experimental part, p. 969 - 974 (2010/12/19)
A series of previously unknown asymmetrical fluorinated bis(aryl)bromonium, alkenyl(aryl)bromonium, and alkynyl(aryl)bromonium salts was prepared by reactions of C6F5BrF2 or 4-CF3C 6H4BrF2 with aryl group transfer reagents Ar′SiF3 (Ar′ = C6F5, 4-FC 6H4, C6H5) or perfluoroorganyl group transfer reagents RF′BF2 (RF = C 6F5, trans-CF3CFCF, C3F 7C≡C) preferentially in weakly coordinating solvents (CCl 3F, CCl2FCClF2, CH2Cl2, CF3CH2CHF2 (PFP), CF3CH 2CF2CH3 (PFB)). The presence of the base MeCN and the influence of the adducts RF′BF2·NCMe (RF = C6F5, CF3C≡C) on reactions aside to bromonium salt formation are discussed. Reactions of C 6F5BrF2 with AlkF′BF 2 in PFP gave mainly C6F5Br and Alk F′F (AlkF′ = C6F13, C6F13CH2CH2), presumably, deriving from the unstable salts [C6F5(AlkF′)Br]Y (Y = [AlkF′BF3]-). Prototypical reactivities of selected bromonium salts were investigated with the nucleophile I-and the electrophile H+. [4-CF3C 6H4(C6F5)Br][BF4] showed the conversion into 4-CF3C6H4Br and C 6F5I when reacted with [Bu4N]I in MeCN. Perfluoroalkynylbromonium salts [CnF2n+1C≡C(R F)Br][BF4] slowly added HF when dissolved in aHF and formed [Z-CnF2n+1CFCH(RF)Br][BF4].
