61228-28-2Relevant academic research and scientific papers
Mechanistic Study of Arylsilane Oxidation through 19F NMR Spectroscopy
Rayment, Elizabeth J.,Mekareeya, Aroonroj,Summerhill, Nick,Anderson, Edward A.
, p. 6138 - 6145 (2017)
The mechanism of the oxidation of arylsilanes to phenols has been investigated using19F NMR spectroscopy. The formation of silanols in these reactions results from a rapid background equilibrium between silanol and alkoxysilane; the relative rates of reaction of these species was evaluated by modeling of concentration profiles obtained through 19F NMR spectroscopic reaction monitoring. Combining these results with a study of initial rates of phenol formation, and of substituent electronic effects, a mechanistic picture involving rapid and reversible formation of a pentavalent peroxide ate complex, prior to rate-limiting aryl migration, has evolved.
Zur Synthese von Siloxanen XI. Spaltung von Siloxanen durch Bortrifluorid
Scheim, U.,Porzel, A.,Ruehlmann, K.
, p. 31 - 38 (2007/10/02)
The cleavage of siloxane bonds by BF3 was investigated kinetically by 1H NMR spectroscopy.The reactions could be evaluated by use ofa pseudo-first order rate law, when a sufficiently large excess of BF3 was used.The order with respect to BF3 was found to be 4.7.The rate constants obtained could be correlated to ?*- values with a ρ*-value of -1.0.The ?*-value found previously by 29Si NMR spectroscopy for the Me3SiO group of 0.35 was confirmed.
REACTIONS IN THE CHLOROSILANE-SILANOL-SILOXANE SYSTEM
Ruehlmann, K.
, p. 139 - 152 (2007/10/02)
We obtained the first ?*-values and ES-values for siloxy groups by spectroscopic and kinetic methods.Detailed mechanistic investigations are performed on the hydrolysis of chlorosilanes, the cleavage of Si-O-Si bonds by HCl, and the substituent exchange reaction between silanols and chlorosilanes.
