Assignment of a methylated sulfur dioxide structure, [CH3O:S:O]+, to the species present in methyl fluoride-antimony pentafluoride-sulfur dioxide solutions and precipitation of a salt of [CH3O:S:O]+ upon addition of sulfur dioxide to methyl fluoride-antimony pentafluoride-sulfuryl chloride fluoride

1976 ◽  
Vol 98 (9) ◽  
pp. 2660-2661 ◽  
Author(s):  
Paul E. Peterson ◽  
Rhett Brockington ◽  
D. Warren Vidrine
Keyword(s):  
Sulfur Dioxide ◽  
Sulfuryl Chloride ◽  
Antimony Pentafluoride ◽  
Methyl Fluoride

O-Methylation of a sulfone with methyl fluoride – antimony pentafluoride – sulfur dioxide. Preparation and properties of tetrahydro-1-methoxythiophenium 1-oxide hexafluoroantimonate

1984 ◽  
Vol 62 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Magdy Malak Abdel-Malik ◽  
Philip Arthur Woodworth Dean ◽  
James Frederick King
Keyword(s):  
Sulfur Dioxide ◽  
Antimony Pentafluoride ◽  
Liquid Sulfur ◽  
Methyl Fluoride ◽  
Methyl Group ◽  
Spectroscopic Evidence ◽  
Group A

Reaction of sulfolane (tetrahydrothiophene 1,1-dioxide) (1) with methyl fluoride – antimony pentafluoride in liquid sulfur dioxide gives crystalline tetrahydro-1-methoxythiophenium 1-oxide hexafluoroantimonate (2), thereby providing the first characterized example of an alkoxysulfoxonium salt. This salt (2) is also formed, but more slowly, by reaction of methyl fluoride with the crystalline 1:1 complex of sulfolane and antimony pentafluoride. Reaction of 2 with nucleophiles leads to transfer of the methyl group, a facile process even with such weak nucleophiles as nitrobenzene and phenyl N,N-dimethylsulfamate. Spectroscopic evidence has been obtained for O-methylation of other sulfones, either by reaction with MeF•SbF5•SO2, or via the sulfone•SbF5 complex and methyl fluoride, or by transmethylation with 2.

scholarly journals Eightfold Electrophilic Methylation of Octacyanotungstate [W(CN)8]4−/3−: Preparation of Homoleptic, Eight-coordinate Methylisocyanide Complexes [W(CNMe)8]4+/5+

2021 ◽  
Author(s):  
Malte Sellin ◽  
Susanne Margot Rupf ◽  
Ulrich Abram ◽  
Moritz Malischewski
Keyword(s):  
Sulfur Dioxide ◽  
Single Crystal ◽  
Epr Spectroscopy ◽  
X Ray Diffraction ◽  
Liquid Sulfur ◽  
Methyl Fluoride ◽  
X Ray ◽  
First Time ◽  
Ir And Raman ◽  
Methyl Triflate

Homoleptic eight-fold coordinated methylisocyanide complexes of W(IV) and W(V) have been prepared for the first time. The reaction of [NBu4]4[W(CN)8] with methyl triflate MeOTf gives [W(CNMe)8][OTf]4. The even stronger methylating mixture of methyl fluoride MeF and arsenic pentafluoride AsF5 in liquid sulfur dioxide SO2 is able to fully alkylate both [NBu4]4[W(CN)8] and [NBu4]3[W(CN)8]. The paramagnetic octakis(methylisocyanide)- tungsten(V) [W(CNMe)8][AsF6]5 is thermally highly unstable above −30 °C. All compounds have been characterized via single-crystal X-ray diffraction, IR and Raman, as well as NMR or EPR spectroscopy<br>

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