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4933-59-9

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4933-59-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4933-59-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,3 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 4933-59:
(6*4)+(5*9)+(4*3)+(3*3)+(2*5)+(1*9)=109
109 % 10 = 9
So 4933-59-9 is a valid CAS Registry Number.

4933-59-9Relevant articles and documents

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.

The first hydrogen containing (polyfluorocycloalken-1-yl)xenon(II) salts

Frohr,Bardin

, p. 562 - 564 (2007/10/03)

(2-H-Hexafluoro-1,4-cyclohexadien-1-yl)xenon(II) and (2-H-octafluorocyclohexen-1-yl)xenon(II) hexafluoroarsenates and tetrafluoroborates were obtained together with their perfluorinated analogues on reacting the corresponding (2,3,4,5-tetrarluorophenyl)xenon(II) salts with XeF2 in anhydrous HF (aHF). The fluorinated (cyclohexen-1-yl)xenon(II) cations react with bromide and iodide anions in MeCN and aHF under alkenylation of the halide anions.

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