Hypervalent Octahedral SiH62− Species from High-Pressure Synthesis

Hypervalent Octahedral SiH62− Species from High-Pressure Synthesis

High‐pressure conditions afford unique all‐hydrido hypervalent complexes [SiH6]2− in the crystalline hydridosilicates A2SiH6 (A=K, Rb). Compared to normal‐valent silanes the SiH bond appears considerably enlarged, by about 0.15 Å. Accordingly, SiH stretching frequencies are drastically reduced, by...

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Veröffentlicht in:Angewandte Chemie International Edition 2012-03, Vol.51 (13), p.3156-3160
Hauptverfasser: Puhakainen, Kati, Benson, Daryn, Nylén, Johanna, Konar, Sumit, Stoyanov, Emil, Leinenweber, Kurt, Häussermann, Ulrich
Format: Artikel
Sprache:eng
Schlagworte:
coordination chemistry
high pressure hydrogenation
hydrido complexes
hypervalent silicon
materialkemi
Materials Chemistry
multi-anvil technique
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Zusammenfassung:High‐pressure conditions afford unique all‐hydrido hypervalent complexes [SiH6]2− in the crystalline hydridosilicates A2SiH6 (A=K, Rb). Compared to normal‐valent silanes the SiH bond appears considerably enlarged, by about 0.15 Å. Accordingly, SiH stretching frequencies are drastically reduced, by about 400–500 cm−1, thus reflecting the weakness of a hypervalent SiH bond.
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201108713