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 language | English (US) |
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Pages (from-to) | 2898-2902 |
Number of pages | 5 |
Journal | Angewandte Chemie - International Edition |
Volume | 60 |
Issue number | 6 |
DOIs | |
State | Published - Feb 8 2021 |
Funding
This research was supported by the Israel Science Foundation (ISF) and by the Alexander Goldberg research fund at the Technion. D.B.‐Z. is grateful to the Ministry of Immigrant Absorption, State of Israel, for a Kamea fellowship.
Keywords
- cluster compounds
- cubanes
- low-valent tin compounds
- stannylenes
- tin
ASJC Scopus subject areas
- Catalysis
- General Chemistry