An isolable, crystalline complex of square-planar silicon(IV)
The structure and reactivity of silicon(IV), the second most abundant element in our Earth's crust, is determined by its invariant tetrahedral coordination geometry. Silicon(IV) with a square-planar configuration (ptSiIV) represents a transition state. Quantum theory supported the feasibility o...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 9, 2021
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| In: |
Chem
Year: 2021, Jahrgang: 7, Heft: 8, Pages: 2151-2159 |
| ISSN: | 2451-9294 |
| DOI: | 10.1016/j.chempr.2021.05.002 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.chempr.2021.05.002 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S2451929421002205 
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| Verfasserangaben: | Fabian Ebner and Lutz Greb |
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| 520 | |a The structure and reactivity of silicon(IV), the second most abundant element in our Earth's crust, is determined by its invariant tetrahedral coordination geometry. Silicon(IV) with a square-planar configuration (ptSiIV) represents a transition state. Quantum theory supported the feasibility of stabilizing ptSiIV by structural constraint, but its isolation has not been achieved yet. Here, we present the synthesis and full characterization of the first square-planar coordinated silicon(IV). The planarity provokes an extremely low-lying unoccupied molecular orbital that induces unusual silicon redox chemistry and CH-agostic interactions. The small separation of the frontier molecular orbitals enables visible-light ligand-element charge transfer and bond-activation reactivity. Previously, such characteristics have been reserved for d-block metals or low-valent p-block elements. Planarization transfers them, for the first time, to a p-block element in the normal valence state. | ||
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| 650 | 4 | |a planar | |
| 650 | 4 | |a silicon | |
| 650 | 4 | |a structural constraint | |
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