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- W4214809764 abstract "Abstract σ‐Type 3‐electron‐2‐center (3e‐2c) bonds have been extensively studied as one of the key bonding motifs in radical chemistry and some biological systems. “π‐Type 3e‐2c‐bonded species” that contain a 3e‐2c π‐bond without an underlying σ‐bond framework, however, have been unexplored so far both theoretically and experimentally. Herein, we report the synthesis of the first stable π‐type 3e‐2c‐bonded species, a silicon analogue of a bicyclo[1.1.0]butane radical anion. This compound exhibits an extremely long bridgehead Si−Si bond (3.0638(8) Å) and a strong near‐IR absorption at 922 nm in solution which arises from a HOMO→SOMO [π(Si−Si)→π*(Si−Si)] transition. DFT calculations revealed a π‐type bonding interaction between the two bridgehead silicon atoms with an unpaired electron mainly delocalized across the corresponding π*‐type orbital, which introduces a novel bonding motif for constructing π‐electron systems." @default.
- W4214809764 created "2022-03-05" @default.
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- W4214809764 date "2022-03-16" @default.
- W4214809764 modified "2023-10-09" @default.
- W4214809764 title "Synthesis, Structure and Electronic Properties of a Stable π‐Type 3‐Electron‐2‐Center‐Bonded Species: A Silicon Analogue of a Bicyclo[1.1.0]butane Radical Anion" @default.
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- W4214809764 doi "https://doi.org/10.1002/ange.202117584" @default.
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