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

Ravi Shankar, Priyanka Chauhan, Ekta Jakhar, Archishmati Dubey, Gabriele Kociok-Köhn

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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.

Original languageEnglish
Pages (from-to)2181-2187
JournalInorganic Chemistry
Issue number5
Early online date25 Jan 2023
Publication statusPublished - 6 Feb 2023

Bibliographical note

Funding Information:
This work was supported by CSIR, India [Grant No. 01(2651)/12/EMR-II]. The grant of research fellowships to P.C., E.J., and A.D. from IIT Delhi and UGC, India, is acknowledged. We gratefully acknowledge Professor Tanmay Dutta and Bipasa Dey, Department of Chemistry, IIT Delhi for antimicrobial studies. The authors thank DST-India for providing a grant for the single crystal X-ray instrument.

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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