Reaktionen von Ameisensäuremethylester in den supersauren Systemen XF/MF5 (X = H,D; M = As,Sb) und die Kristallstruktur von HC(OH)(OCH3)+AsF6–

Reactions of Formic Acid Methylester in the Super Acidic System XF/MF₅ (X = H, D: M = As, Sb) and the Crystal Structure of HC(OH)(OCH₃)⁺AsF₆^– The reaction of formic acid methyl ester in the superacidic system XF/MF₅ (X = H, D: M = As, Sb) leads to the hydroxy methoxy carbenium hexafluorometallates. The very hydrolysable and thermo labile salts are characterized by vibrational and NMR spectroscopic methods. Under inert conditions they are stable at –20 °C for some weeks. HC(OCH₃)(OH)⁺AsF₆^– crystallizes in the monoclinic space group P2₁/c (No. 14) with a = 5.275(1) Å, b = 11.059(1) Å, c = 12.113(1) Å und β = 96.64(1)° and four formula units per cell.     

Darstellung der Iminiumsalze CF3?NXCF2+MF6− (X = CH3, F und M = As,Sb) und CF3?NCl = CF2+ AsF6−

Preparation of the Iminium Salts CF₃? NX?CF₂⁺MF₆^? (X = CH₃, F and M = As, Sb) and CF₃? NCl?CF₂⁺ AsF₆^? The preparation of the iminiumsalts CF₃? NX?CF₂⁺ MF₆^? (X = CH₃, F and M = As, Sb) and CF₃? NCl?CF₂⁺ AsF₆^? is reported. The salts were characterized by NMR and infrared spectroscopy. CF₃? NCH₃?CF₂⁺MF₆^? decompose into MF₅ and (CF₃)₂NCH₃.     

Bromsulfenyl(trihalogen)phosphonium-Salze Cl3−nBrnPSBr+AsF6− (n = 0 – 3) und Cl3PSBr+SbF6− — Oxidative Bromierung von Thiophosphorylhalogeniden

Bromosulfenyl(trihalogeno)phosphonium Salts Cl_3?nBr_nPSBr⁺AsF₆^? (n = 0 – 3) and Cl₃PSBr⁺SbF₆^? — Oxidative Bromination of Thiophosphorylhalides The bromosulfenyl(trihalogeno)phosphonium salts Cl_3?nBr_nPSBr⁺AsF₆^? (n = 0 – 3) and Cl₃PSBr⁺SbF₆^? are prepared by oxidative bromination of the corresponding thiophosphorylhalides with Br₂/MF₅ (M = As, Sb) and characterized by vibrational and NMR spectroscopy.     

Methyloxoniumhexafluorometallate – Synthese,spektroskopische Charakterisierung sowie die Kristallstruktur von H3COH2+AsF6–

Methyloxoniumhexafluorometallates – Synthesis, Spectroscopic Characterization and Crystal Structure of H₃COH₂⁺AsF₆^– Up to now the protonation of methanol as a hydrogen bridged dimethanolium ion [H(CH₃OH)₂]⁺ was observed by different X-ray crystal structure studies. Now the preparation of H₃COH₂⁺MF₆^– in super acid media HF/MF₅ (M = As, Sb) is reported. The thermolabile and moisture sensitive salts are characterized by vibrational and NMR spectroscopy. H₃COH₂⁺AsF₆^– crystallizes in the monoclinic space group P2₁/m (No. 11) with a = 487.8(1), b = 714.0(2), c = 848.2(2) pm, β = 98.03°(2) with 2 formula units per unit cell.     

Darstellung von Dichlornitronium-hexafluoroarsenat und -hexafluoroantimonat ONCl2+MF6−(M = As,Sb)

Preparation of Dichlornitronium-hexafluoroarsenate and -hexafluoroantimonate ONCl₂⁺MF₆^?(M = As, Sb) The preparation of ONCl₂⁺MF₆^? (M = As, Sb) by oxidative chlorination of CNCl with Cl₂/AsF₅ and Cl₂/SbF₅ is reported. Both salts are characterized by Raman Spectroscopy. The difficulties in evaluating a force field for the cation are discussed.     

The Protonation of Acetamide and Thioacetamide in Super­acidic Solutions: Crystal Structures of [H3CC(OH)NH2]+AsF6– and [H3CC(SH)NH2]+AsF6–

Acetamide and thioacetamide react with the superacid solutions HF/MF₅ (M = As, Sb) under formation of the corresponding salts [H₃CC(OH)NH₂]⁺MF₆^– and [H₃CC(SH)NH₂]⁺MF₆^– (M = As, Sb), respectively. The reaction of DF/AsF₅ with acetamide and thioacetamide lead to the corresponding deuterated salts [H₃CC(OD)ND₂]⁺AsF₆^– and [H₃CC(SD)ND₂]⁺AsF₆^–, respectively_. The salts are characterized by vibrational and NMR spectroscopy, and in the case of [H₃CC(OH)NH₂]⁺AsF₆^– and [H₃CC(SH)NH₂]⁺AsF₆^– also by single‐crystal X‐ray analyses. The [H₃CC(OH)NH₂]⁺AsF₆^– ( 1 ) salt crystallizes in the triclinic space group P$\bar{1}$ with two formula units per unit cell, and the [H₃CC(SH)NH₂]⁺AsF₆^– ( 2 ) salt crystallizes in the monoclinic space group P2₁/c with four formula units per unit cell. In both crystal structures three‐dimensional networks are observed which are formed by intra‐ and intermolecular N–H ··· F and O–H ··· F or S–H ··· F hydrogen bonds, respectively. For the vibrational analyses, quantum chemically calculated spectra of the cations [H₃CC(OH)NH₂ · 3HF]⁺ and [H₃CC(SH)NH₂ · 2HF]⁺ are considered.     

über die Reaktionen von CH3OCl,CF3OCl,CF3OF und CF3OH mit dem supersauren System HF/MF5 (M = As,Sb) Darstellung und Charakterisierung von CH3OCl(H)+MF6− und CF3OCl(H)+MF6−

On the Reactions of CH₃OCl, CF₃OCl, CF₃OF, and CF₃OH with the Superacid System HF/MF₅ (M = As, Sb). Preparation and Characterization of CH₃OCl(H)⁺MF₆^? and CF₃OCl(H)⁺MF₆^? The preparation of the chlorine oxoniumsalts CH₃OCl(H)⁺MF₆^? and CF₃OCl(H)⁺MF₆^? by protonation of CH₃OCl and CF₃OCl in the superacid solution of HF/MF₅ (M = As, Sb) is described. However CF₃OF and CF₃OH have not been protonated under the same conditions. In the case of CF₃OH the formation of F₂CO · MF₅ is observed. The novel compounds are characterized by nmr- and vibrational spectroscopy.     

Über die Kristallstrukturen von CH3PF2H+AsF6− und CH3PF2H+SbF6− und eine einfache Darstellung von CH3PF2

On the Crystal Structures of CH₃PF₂H⁺AsF₆^? and CH₃PF₂H⁺SbF₆^? and a simple Method for Preparation of CH₃PF₂ A simple method for preparation of CH₃PF₂ from CH₃PCl₂ is reported. The phosphonium salts CH₃PF₂H⁺MF₆^? are obtained by the reaction of CH₃PCl₂ with superacidic systems HF/MF₅ (M = As, Sb). CH₃PF₂H⁺SbF₆^? crystallizes in the space group P1 with a = 548.4(4) pm, b = 695.5(8) pm, c = 960.2(9) pm, α = 94.68(5)°, β = 97.19(6)°, γ = 94.41(6)° and Z = 2. CH₃PF₂H⁺SbF₆^? crystallizes in P1 with a = 554.3(3), b = 724.2(4), c = 970.4(5), α = 94.73(4)°, β = 96.14(5)°, γ = 95.30(4)°.     

Über die Darstellung der Dichlormethylen-halogensulfenium-Salze Cl2CSCl+ AsF6− und Cl2CSBr+ AsF6− [1]

The Synthesis of the Dichloromethylene-halogenosulfenium Salts Cl₂CSCl⁺ AsF₆^? and Cl₂CSBr⁺ AsF₆^? The sulfenium salts Cl₂CSCl⁺ AsF₆^? and Cl₂CSBr⁺ AsF₆^? are synthesized by oxidative halogenation of thiophosgene, Cl₂CS with X₂/AsF₅ (X = Cl, Br) at 195 K and are characterized by vibrational as well as NMR spectroscopy.     

Darstellung und spektroskopische Charakterisierung der Cyannitrilium-Salze NCCNH+MF6− und der N-Methyl-cyannitrillium-Salze NCCNCH3+MF6− (M = As,Sb)

Synthesis and Spectroscopic Characterization of the Cyanonitrilium Salts NCCNH⁺MF^?₆ and the N-Methyl-cyanonitrilium Salts NCCNCH₃⁺MF₆^? (M = As, Sb) The cyanonitrilium salts NCCNH⁺MF^?₆ (M = As, Sb) are prepared by protonation of cyanogene (CN)₂ in the superacid HF/MF₅ at 195 K. The synthesis of the N-methyl-cyanonitrilium salts NCCNCH₃⁺MF₆^? (M = As, Sb) is proceeded by methylation of cyanogene by CH₃OSO⁺MF₆^? in SO₂ also at low temperature. All salts are characterized by vibrational and NMR spectra.     

Darstellung der Dichlormethyleniminium-Salze Cl2CNClH+ MF6− und Cl2CNClCH3+ MF6− (M = As,Sb) und Kristallstruktur von Dichlormethyleniminiumhexachloroantimonat Cl2CNH2+SbCl6−

Synthesis of the Dichloromethyleneiminium Salts Cl₂C?NClH⁺MF₆^? and Cl₂C?NClCH₃⁺ MF₆^? (M = As, Sb) and Crystal Structure of Dichloromethyleneiminium-hyxachloroantimonate Cl₂C?NH₂⁺SbCl₆^? The N-chloro-dichloromethyleneiminium salts Cl₂C=NCIH⁺MF₆^? (M = As, Sb) are prepared by protonationof trichloromethyleneimine in the superacide system HF/MF5 at 195 K. The synthesis of the N-chloro-N-methyl-dichloromethyleneiminium salts Cl₂C?NClCH₃⁺MF₆^? (M = As, Sb) is proceeded by methylation of perchloromethylenimine by CH₃OSO⁺MF₆^? in SO₂ also at low temperature. All salts are characterized by vibrational and NMR spectra. The dichloromethyleneiminiumhexachloroantimonate crystallizes in the space group P2₁/c with a = 971.3(4)pm, b = 1134.0(4)pm, c = 2154.2(7)pm β = 102.04(3)° and Z = 8.     

Die Darstellung der N-Methyl-halogennitrilium-Salze XCNCH3+MF6− (X = Cl,Br, I; M = As,Sb) und der N-Methyl-trifluoracetonitrilium-Salze CF3CNCH3+MG6−

Preparation of N-Methylhalidonitrilium Salts XCNCH₃⁺MF₆^? (X = Cl, Br, I; M = As, Sb) and the N-Methyl-trifluoroacetonitrilium Salts CF₃CNCH₃⁺MF₆^? The N-methyl-halidonitrilium salts XCNCH₃⁺MF₆^? (X = Cl, Br, I; M = As, Sb) are synthesized by methylation of cyanogen halides with CH₃F/MF₅ in SO₂ at low temperatures. The N-methyl-trifluoroacetonitrilium salts CF₃CNCH₃⁺MF₆^? (M = As, Sb) are formed analogous with trifluoroacetonitrile. All salts are characterized by vibrational and NMR spectroscopy.     

Über die Darstellung der N-Chlor-N-Methylammoniumsalze (CH3)nNCl4–n+MF6− (n = 1–3; M = As,Sb) und (CH3)2NCIX+MF6− (X = F,Br)

About the Preparation of N-Chloro-N-Methylammonium Salts (CH₃)_nNCl_4–n⁺MF₆^? (n = 1–3; M = As, Sb) and (CH₃)₂NClX⁺MF₆^? (X = F, Br) Simple one-step methods for the preparation of the methylated chloroammonium salts (CH₃)_nNCl_4–n⁺MF₆^? (n = 1–3; M = As, Sb) and for (CH₃)₂NClX⁺MF₆^? (X = F, Br) are reported. Their vibrational and NMR-spectroscopical data are discussed in comparison.     

Darstellung von CF3SClF+MF6− (M = As,Sb) und Kristallstruktur von CF3SCl2+SbF6−

Preparation of CF₃SClF⁺MF₆^? (M = As, Sb) and Crystal Structure of CF₃SCl₂⁺SbF₆^? CF₃SClF⁺MF₆^? (M = As, Sb) is prepared by oxidative fluorination of CF₃SCl with XeF⁺MF₆^?. The new salt is characterized by IR, Raman and NMR spectra in comparison with CF₃SF₂⁺MF₆^? and CF₃SCl₂⁺MF₆^?. In SO₂ solution CF₃SClF⁺SbF₆^? symmetrizises into CF₃SF₂⁺SbF₆^? and crystalline CF₃SCl₂⁺SbF₆^? with the monoclinic space group P2₁/c with a = 773.5(14) pm, b = 954.8(15) pm, c = 1242.0(18) pm, β = 100.24(8)°, Z = 4.     

X-ray crystal structure and raman spectrum of tribromine(1+) hexafluoroarsenate(V), Br3+AsF6−, and raman spectrum of pentabromine(1+) hexafluoroarsenate(V), Br5+AsF6−

A single crystal of Br₃⁺AsF₆^? was isolated from a sample of BrF₂⁺AsF₆^? which had been stored for 20 years. It was characterized by x-ray diffraction and Raman spectroscopy. It is shown that Br₃⁺AsF₆^? (triclinic, a = 7.644(7) Å, b = 5.641(6) Å, c = 9.810(9) Å, α = 99.16(8)°, β = 86.61(6)°, γ = 100.11(7)°, space group P1 R(F) = 0.0608) is isomorphous with I₃⁺AsF₆^?. The structure consists of discrete Br₃⁺ and AsF₆^? ions with some cation-anion interaction causing distortion of the AsF₆^? octahedron. The Br₃⁺ cation is symmetric with a bond distance of 2.270(5) Å and a bond angle of 102.5(2)°. The three fundamental vibrations of Br₃⁺ were observed at 297 (ν₃), 293 (ν₁), and 124 cm^?1 (ν₂). The Raman spectra of Cl₃⁺AsF₆^? and I₃⁺AsF₆^? were reinvestigated and ν₃(B₁) of I₃⁺ was reassigned. General valence force fields are given for the series Cl₃⁺, Br₃⁺, and I₃⁺. Reactions of excess Br₂ with either BrF₂⁺AsF₆^? or O₂⁺AsF₆^? produce mixtures of Br₃⁺AsF₆^? and Br₅⁺AsF₆^?. Based on its Raman spectra, the Br₅⁺ cation possesses a planar, centrosymmetric structure of C_2h symmetry with three semi-ionically bound, collinear, central Br atoms and two more covalently, perpendicularly bound, terminal Br atoms.     

Über die Gasphasenstruktur von CF3NCl2 und die Darstellung von CF3NCl2F+MF6− (M = As,Sb) und CF2 = NClF+SbF6−

Gas Phase Structure of CF₃NCl₂ and Preparation of CF₃NCl₂F⁺MF₆^? (M = As, Sb) and CF₂ = NCl₂F⁺SbF₆^? The gas phase structure of CF₃NCl₂ is reported. The following skeletal parameters are derived (r_a-values, error limits are 3σ values): N? C = 1.470(6) Å, N? Cl = 1.733(3) Å, ClNCl = 111.5(4)° and ClNC = 107.6(5)°. CF₃NCl₂F⁺MF₆^? is prepared by fluorination of CF₃NCl₂ with XeF⁺MF₆^?. The same educt CF₃NCl₂ reacts with XeF⁺SbF₆^? at ?40°C to CF₂ = NClF⁺SbF₆^? under elimination of ClF.     

Darstellung und spektroskopische Charakterisierung der Fluorphosphonium-Salze X2FPSCH3+MF6− (X = Br,Cl; M = As,Sb) und XF2PSCH3+SbF6− (X = Br,Cl, F)

Preparation and Spectroscopic Characterization of the Fluorophosphonium Salts X₂FPSCH₃⁺MF₆^? (X = Br, Cl; M = As, Sb) and XF₂PSCH₃⁺SbF₆^? (X = Br, Cl, F) The preparation of the fluorophosphonium salts X₂FPSCH₃⁺MF₆^? (X = Br, Cl; M = As, Sb) and XF₂PSCH₃⁺SbF₆^? (X = Br, Cl, F) by methylation of the corresponding thiophosphorylhalides in the system CH₃F/SO₂/MF₅ (M = As, Sb) is reported. The new salts are characterized by their vibrational and NMR spectra.     

Die Darstellung der Methylthio(trihalogen)phosphonium-Salze ClnBr3−nPSCH3+MF6−(n = 0–3; M = As,Sb) und Hal3PSCH3+SbCl6−(Hal = Br,Cl)

The Preparation of Methylthio(trihalogeno)phosphonium Salts Cl_nBr_3?nPSCH₃⁺MF₆^?(n = 0–3; M = As, Sb) and Hal₃PSCH₃⁺SbCl₆^?(Hal = Br, Cl) The methylthio(trihalogeno) phosphonium salts Br_nCl_3?nPSCH₃⁺MF₆^? (n = 0–3; M = As, Sb) are prepared by methylation of the corresponding thiophosphorylhalides Br_nCl_3?nPS in the system SO₂/CH₃F/MF₅. The hexachloroantimonates Hal₃PSCH₃⁺SbCl₆^?(Hal = Br, Cl) are synthesized by thiomethylation of PBr₃ and PCl₃ with CH₃SCl/SbCl₅. All salts are characterized by vibrational and NMR spectroscopy.     

Darstellung von N-Methyl-N-chlornitryl-hexafluorometallaten ON(Cl)CH3+MF6− (M = As,Sb)

Preparation of N-Methyl-N-chlornitryl Hexafluoro Metallates ON(Cl)CH₃⁺MF₆^? (M = As, Sb) . The preparation of ON(Cl)CH₃⁺MF₆^? (M = As, Sb) by methylation of ONCl with CH₃OSO⁺MF₆^? (M = As, Sb) is reported. Both salts were unlimited stable at - 78°C. The nitryl cation which is isoelectronic with acetyl chloride was identified by vibrational spectroscopy as N-chloro-N-hydroxy-methaneiminium cation in the solid state.     

Synthese von (C6F5)2SF+MF6− (M  As,Sb) und Kristallstruktur von (C6F5)2SF+SbF6− [1]

Preparation of (C₆F₅)₂SF⁺MF₆^? (M ? As, Sb) and Crystal Structure of (C₆F₅)₂SF⁺SbF₆^? XeF⁺MF₆^? (M ? As, Sb) reacts with (C₆F₅)₂S in HF to form (C₆F₅)₂SF⁺MF₆^?. The deeply violet sulfonium salts can be kept without decomposition up to 24 h at room temperature. The hexafluoroantimonate salt crystallizes in the monoclinic space group P2₁/n with a = 1056.4(7) pm, b = 1446.3(10) pm, c = 1102.9(8) pm, β = 91.29(6)° und Z = 4. The SF-bond distance with 158.4(3) pm is of unusual length. Cations and anions are connected via interionic fluorine contacts to an infinite chain, in which cations and anions form to ABAB sequence along the chain.