A High Yield Synthesis of an Octastannacubane and a Bis(silyl) Stannylene via Reductive Elimination of a Silane

Roman Bashkurov, Yosi Kratish, Natalia Fridman, Dmitry Bravo-Zhivotovskii*, Yitzhak Apeloig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Thermolysis of tris(silyl) tin hydride 2 at 70 °C for 3 hours results in elimination of tBu2MeSiH and generation of bis(silyl) stannylene 3 which dimerizes instantaneously yielding distannene 4. Compound 3 can be trapped by NHCMe yielding stannylene-NHCMe complex 5. Upon heating (70 °C, 24 h) 4 yields stannyl radical 8 along with pentastannatricyclo[2.1.0.02, 5]pentane 10 (ca. 30 %) and traces (ca. 5 %) of the novel octastannacubane 9. Remarkably, octastannacubane 9 is produced in 70 % yield by mild heating (50 °C) of 1,1,2,2-tetrasilyldistannane 11, along with tBu2MeSiH. Octastannacubane 9 was characterized by X-ray crystallography, NMR and UV/Vis spectroscopy. Based on DFT quantum-mechanical calculations the 11 → 9 transformation occurs via reductive elimination of two tBu2MeSiH molecules from 11 yielding a distannyne, (or its bis-stannylene isomer), followed by its tetramerization.

Original languageEnglish (US)
Pages (from-to)2898-2902
Number of pages5
JournalAngewandte Chemie - International Edition
Volume60
Issue number6
DOIs
StatePublished - Feb 8 2021
Externally publishedYes

Keywords

  • cluster compounds
  • cubanes
  • low-valent tin compounds
  • stannylenes
  • tin

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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