Crystal structure, Raman spectrum, and nuclear magnetic resonance spectrum of methoxythionyl .mu.-fluoro-bis(pentafluoroantimonate(V)), CH3OSO+Sb2F11-

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

“…Abstracts, but the first -in its overseas form, "sulpholane" -is the shown to contain MeOSO' Sb,F,+, (13)(14)(15). The reaction of sulfolane (1) with this methylating agent appeared, from preliminary experiments in conventional round-bottomed flasks, to lead to the 0-methylated product (2).…”

Synthesis and Structure of [Ni(SO2)6](AsF6)2 and [Fe(SO2)4(FAsF5)2]

“…The synthesis [14], isolation. and preparation of single crystals o f 3 was achieved in an analogous fashion [18] …”

A Very Strong Methylation Agent: [Me2Cl][Al(OTeF5)4]

“…Strong and easily accessible electrophilic methylation agents are rare. The strongest known methylation systems are MeF/SbF 5 in liquid SO 2 or anhydrous HF, and the closo ‐carborates Me(CHB 11 Me 5 X 6 ) (X=Cl, Br) . It is possible to crystallize methylated SO 2 , that is, [MeSO 2 ][SbF 6 ], from a mixture of MeF/SbF 5 /SO 2.…”

“…The usage of 1 as a strong methylation agent was demonstrated by methylation of very weak bases, yielding the [MeP(CF 3 ) 3 ] + , [Me 2 Br] + , and [Me 2 I] + cations, as well as the first spectroscopic evidence for the elusive [MePF 3 ] + cation. The methylating agent 1 combines the advantages of Me(CB 11 Me 5 X 6 ) and the MeF/SbF 5 system: a Lewis acid free, non‐oxidizing compound with large‐scale accessibility.…”