18312-49-7Relevant academic research and scientific papers
ZUR SYNTHESE VON SILOXANEN. II, STERISCHE SUBSTITUENTENKONSTANTEN FUER SILOXYRESTE
Scheim, U.,Grosse-Ruyken, H.,Ruehlmann, K.,Porzel, A.
, p. 29 - 36 (1985)
The acetolysis reactions of compounds of the type XSiMe2Cl (I) with acetic acid in the presence of acetic anhydride were studied kinetically by means of 1H NMR spectroscopy.We found these reactions exclusively influenced by steric effects (ρ=0).The steric susceptibility constant (δ) of the acetolysis reaction, using alkylchlorodimethylsilanes was found to be 1.3.In this investigation the Taft Es nvalues showed a better correlation than the Es(Si) values of Cartledge.From the rate constants of the acetolysis reactions with I (X=Cl, acetoxy or siloxy) we could then obtain for the first time Es values for Cl, acetoxy and a series of siloxy groups at silicon.
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.
