Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies
Тип публикации: Journal Article
Дата публикации: 2005-10-21
scimago Q2
wos Q1
БС1
SJR: 0.676
CiteScore: 5.1
Impact factor: 2.9
ISSN: 02767333, 15206041
Organic Chemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Краткое описание
The coupling reaction of silyl hydrides with alkoxysilanes to produce siloxanes and hydrocarbons catalyzed by tris(pentafluorophenyl)borane was studied by gas chromatography and UV spectroscopy using model reagent systems: Ph2MeSiH + Ph2MeSiOn-Oct (I) and Ph2MeSiH + Me3SiOn-Oct (II). Detailed kinetic studies performed for system I showed that the reaction is first order in both substrates and the rate is proportional to the catalyst concentration. A highly negative apparent entropy of activation points to a crowded transition state structure, leading to a significant dependence of the rate on steric effects. Studies of system II demonstrated that the exchange of the Si−H and Si−OR functionality accompanies the coupling process and in many cases is the dominating reaction in this system. Ultraviolet spectra recorded during the reaction show a distinct strong absorption band with λmax = 303−306 nm, which is due to an allowed electronic transition in the uncomplexed B(C6F5)3 molecule. This absorption also g...
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Chojnowski J. et al. Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies // Organometallics. 2005. Vol. 24. No. 25. pp. 6077-6084.
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Chojnowski J., Rubinsztajn S., Cella J. A., Fortuniak W., Cypryk M., Kurjata J., Kaźmierski K. Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies // Organometallics. 2005. Vol. 24. No. 25. pp. 6077-6084.
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TY - JOUR
DO - 10.1021/om050563p
UR - https://doi.org/10.1021/om050563p
TI - Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies
T2 - Organometallics
AU - Chojnowski, J.
AU - Rubinsztajn, Slawomir
AU - Cella, James A
AU - Fortuniak, W.
AU - Cypryk, Marek
AU - Kurjata, Jan
AU - Kaźmierski, Krzysztof
PY - 2005
DA - 2005/10/21
PB - American Chemical Society (ACS)
SP - 6077-6084
IS - 25
VL - 24
SN - 0276-7333
SN - 1520-6041
ER -
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@article{2005_Chojnowski,
author = {J. Chojnowski and Slawomir Rubinsztajn and James A Cella and W. Fortuniak and Marek Cypryk and Jan Kurjata and Krzysztof Kaźmierski},
title = {Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies},
journal = {Organometallics},
year = {2005},
volume = {24},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021/om050563p},
number = {25},
pages = {6077--6084},
doi = {10.1021/om050563p}
}
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MLA
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Chojnowski, J., et al. “Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies.” Organometallics, vol. 24, no. 25, Oct. 2005, pp. 6077-6084. https://doi.org/10.1021/om050563p.