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A Silylene–Germylene Molecule Containing a Si I −Ge I Single Bond
Author(s) -
Qin Yingying,
Zheng Gang,
Guo Yan,
Gao Fangfang,
Ma Jiani,
Sun Wei,
Xie Gang,
Chen Sanping,
Wang Yaoyu,
Sun Huaming,
Li Anyang,
Wang Wenyuan
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202000836
Subject(s) - silylene , crystallography , chemistry , molecule , bent molecular geometry , metathesis , germanium , bond length , ion , molecular geometry , computational chemistry , silicon , crystal structure , organic chemistry , polymerization , polymer
The first isolable silylene–germylene complex 5 was assembled by a salt metathesis reaction between the germylene anion 3 and the N‐heterocyclic chlorosilylene 4 , and structurally characterized. The central structure of 5 demonstrates a remarkable gauche ‐bent geometry with the silylene and germylene units, which are interconnected by a Si−Ge bond with a length of 2.4498(9) Å. This value is not only perceptibly longer than the distances known in doubly bonded germasilenes, and also slightly longer than those in germylsilanes. The DFT calculations on 5 confirmed a nearly nonpolar Si I −Ge I single‐bond nature and its bonding orbital, as well as the aromaticity of the C 3 NGe‐rings in 3 and 5 . The latter increases the molecular stability of 3 and 5 , and makes the preparation of silylene–germylene complex 5 a reality.