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- W2907726076 abstract "Abstract As anionic five‐coordinate silicon species (five‐coordinate silicates) exhibit high reactivity and unique fluxional behavior, their structure and property have received substantial attention. We report herein synthesis, structure, and fluxional behavior of alkoxy(tetraaryl)silicates having the 9,10‐disilatriptycene skeleton ( 6 − and 7 − ). The molecular structure of the cryptate salt [Li(crypt‐222)] + 7 − shows that the five‐coordinate silicon adopts a distorted trigonal bipyramidal structure with oxygen atom occupying an equatorial position. In the 1 H and 13 C{ 1 H} NMR spectra of [Li(crypt‐222)] + 7 − , a set of signals due to o ‐phenylene blades in 7 − was observed at room temperature, which indicates fluxional behavior of 7 − on the NMR timescale. Computational study suggests that the observed process proceeds via a 120° rotation of bidentate ligand around the Si‐Si axis that consists of two sequential Berry pseudorotations." @default.
- W2907726076 created "2019-01-11" @default.
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- W2907726076 date "2018-12-01" @default.
- W2907726076 modified "2023-09-25" @default.
- W2907726076 title "Alkoxy(tetraaryl)silicates bearing 9,10-disilatriptycene skeleton" @default.
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- W2907726076 doi "https://doi.org/10.1002/hc.21481" @default.
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