Ketil
Ketil(ketyl), orKetyl radicalis a species generated by giving one electron. It is drawn by the following resonance expression.
Although it is unstable under normal conditions, it can be generated in a system from which oxygen and water have been removed.
Occurrence
When it acts on the ketone or the like, one electron moves from the metal to the ketone to generate ketil. That is, the ketone undergoes a one-electron reduction to become ketyl.
RR'C = O + Na -> RR'C - - O - \ + Na +
This reduction reaction can be carried out in the presence of a metal, Such as reducing agents. Is metal magnesium, and low valence titanium is used as a reducing agent to generate ketyl, and the carbonyl groups are homo-coupled with each other.
Use
It developed to deep blue color by benzophenone ketyl
Benzophenone ketyl is used to dry organic solvents such as and. Dissolve in solvent and add sodium to give deep blue benzophenone ketyl. If oxygen or water remains in the solvent, it reacts promptly and the color disappears, so this ketil is a desiccant and also serves as an indicator that oxygen and water do not remain. When benzophenone ketyl further accepts one electron, it becomes dianion and it gets purple.
External link
- \ - IUPAC Gold Book
Acquired from ""
Post Date : 2018-02-14 06:00
This article is taken from the Japanese Wikipedia Ketil
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