Contributions to the chemistry of silicon-sulphur compounds: LV. Isosteric isobutyl(isopropoxy)silanethiols. Preparation and spectroscopic properties

Contributions to the chemistry of silicon-sulphur compounds: LV. Isosteric isobutyl(isopropoxy)silanethiols. Preparation and spectroscopic properties

The reactions of isobutyl(isopropoxy)silyl bromides i-Bu n (i-PrO) 3− n SiBr ( n = 0–3) with H 2S in the presence of Et 3N yield the corresponding silanethiols, i-Bu n (i-PrO) 3− n SiSH. The transition energy σ → σ ★ and the IP of SiS bond, as well as the first IP of sulphur lone pairs do not chang...

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Veröffentlicht in:Journal of organometallic chemistry 1989-12, Vol.378 (3), p.317-326
Hauptverfasser: Pikies, J., Wojnowski, W.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Exact sciences and technology
Organic chemistry
Organometalloidal and organometallic compounds
Preparations and properties
Si derivatives
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Zusammenfassung:The reactions of isobutyl(isopropoxy)silyl bromides i-Bu n (i-PrO) 3− n SiBr ( n = 0–3) with H 2S in the presence of Et 3N yield the corresponding silanethiols, i-Bu n (i-PrO) 3− n SiSH. The transition energy σ → σ ★ and the IP of SiS bond, as well as the first IP of sulphur lone pairs do not change significantly as the number of electronegative i-PrO groups is varied. The geminal anomeric effects seems to be the reason for the increased reactivity of i-Bu(i-PrO) 2SiSH and i-Bu(i-PrO) 2SiH.
ISSN:0022-328X
1872-8561
DOI:10.1016/0022-328X(89)85359-8