Organotin(IV) trifluoromethanesulfonates chemistry: Isolation and characterization of a new di-n-butyl derivative presenting a Sn3O3 core

Approach to Di/Triorganotin(IV) Cations via Hydrolysis of Stannate Salts Bearing Alkanesulfonate Ligands

An in-depth study of the class of organotin cations bearing weakly coordinating trifluoromethanesulfonate/arylsulfonate has led to key insights into their stability, structural aspects, and role as catalysts. Related chemistry with alkanesulfonate ligands remains a missing link due to the strong Sn-O bond. The study reported herein describes the scope of diorganostannates, [n-Bu₄N][R₂Sn(OSO₂R¹)₃] (R = n-Bu, R¹ = Me(1), Et(2); R = Ph, R¹ = Me(3)), as reactive substrates in the presence of adventitious water to afford [n-Bu₂SnOH(OSO₂Me)] (4), [n-Bu₂Sn(H₂O)₄][n-Bu₄N][OSO₂Et]₃·H₂O (5), and [Ph₂Sn(H₂O)₄][n-Bu₄N]₂[OSO₂Me]₄ (6), respectively, the latter two being the first examples of salt cocrystals comprising tetra(aqua)diorganotin cations. Hydrolysis of 3 in the presence of 1,4-bis((1H-imidazol-1-yl)methyl)benzene (bix) as the N-donor ligand proceeds via disproportionation and yields [Ph₃Sn(bix)](OSO₂Me) (7) along with an insoluble solid, likely derived from the hydrolysis of PhSn(OSO₂Me)₃. Direct evidence of this phenomenon can be gleaned from ESI-MS of 3, which identifies mass clusters corresponding to [Ph₃Sn(OSO₂Me)₂]^- and [PhSn(OSO₂Me)₃-H⁺]^-. X-ray crystallographic studies of 1-7 are reported to establish their structural identity and the role of alkanesulfonate anions in the formation of supramolecular assemblies.

The reaction of phenoxatellurine with single-electron oxidizers revisited

Baking Pancakes: Dicationic products of the single-electron oxidation of phenoxatellurine.