The benzophenone-sodium still is a widely used method to produce moisture, oxygen, and peroxide free organic solvents, especially for tetrahydrofuran (THF). The soluble benzophenone ketyls can be formed as radical anion by one-electron reduction of carbonyls with sodium.
Revisiting of Benzophenone Ketyl Still: Use of a Sodium …
2018年10月5日 · A new protocol for the dehydration of solvents to pass through alumina and copper columns developed by Grubbs was shown to produce extremely anhydrous solvents by a simple procedure, which completely replaced the conventional distillation protocol employing sodium–benzophenone ketyl.
Ketyl - Wikipedia
Ketyls can be formed as radical anions by one-electron reduction of carbonyls with alkali metals. Sodium and potassium metal reduce benzophenone in THF solution to the soluble ketyl radical. Ketyls are also invoked as intermediates in the pinacol coupling reaction.
Revisiting of Benzophenone Ketyl Still: Use of a Sodium …
2018年10月10日 · A facile generation of organic solvents of anhydrous grade can be performed by distillation from sodium–benzophenone ketyl, which is prepared from commercial sodium dispersion and benzophenone. The distilled tetrahydrofuran, diethyl ether, hexane, 1,2-dimethoxyethane, and 1,4-dioxane with water contents less than 10 ppm were obtained by a ...
Distillation of the anhydrous solvent from sodium dispersion ...
A facile generation of organic solvents of anhydrous grade can be performed by distillation from sodium–benzophenone ketyl, which is prepared from commercial sodium dispersion and...
ABSTRACT: A facile generation of organic solvents of anhydrous grade can be performed by distillation from sodium−benzophenone ketyl, which is prepared from commercial sodium dispersion and benzophenone.
Revisiting of Benzophenone Ketyl Still: Use of a Sodium
2018年10月31日 · A facile generation of organic solvents of anhydrous grade can be performed by distillation from sodium-benzophenone ketyl, which is prepared from commercial sodium dispersion and benzophenone. The distilled tetrahydrofuran, diethyl ether, hexane, 1,2-dimethoxyethane, and 1,4-dioxane with water cont …
(PDF) Revisiting of Benzophenone Ketyl Still: Use of a Sodium ...
2018年10月31日 · A facile generation of organic solvents of anhydrous grade can be performed by distillation from sodium–benzophenone ketyl, which is prepared from commercial sodium dispersion and...
Revisiting of Benzophenone Ketyl Still: Use of a Sodium …
Explore the efficient generation of anhydrous grade organic solvents using sodium dispersion and benzophenone ketyl distillation.
An expeditious and consistent procedure for tetrahydrofuran (THF ...
2009年1月1日 · Despite the availability of alternative methods for drying tetrahydrofuran (THF), the use of the still apparatus, wherein a THF solution containing Na-bezophenone ketyl is …