Hypervalent Octahedral SiH₆²⁻Species from High‐Pressure Synthesis

Abstract

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. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.