Tris acetylacetonato silicon Chloride Hydrochloride and Some Derivatives

TRIS(ACETYLACETONATO)SILICON CHLORIDE HYDROCHLORIDE AND SOME DERIVATIVES 

Submitted by Reed F. Riley, Robebt West, and Robebt BabbabinJ Checked by George Slusabozuk and Stanley Kibsohneb  

The chelates which silicon forms with /3 diketones (1,3-diketones) and d-keto esters - are of interest as 

A 300-ml. three-necked flask is equipped with a dropping funnel and Avith a short condenser, both isolated from atmospheric moisture by means of calcium chloride drying tubes. If the reaction is not to be carried out in a hood, a tube should lead from the drying tube at the top of the condenser to a trap for absorbing gaseous hydrogen chloride. 

The acetylacetone solution is then added over a period of 10 minutes with occasional agitation of the flask and its contents. A light yellow oily layer appears immediately, accompanied by evolution of hydrogen chloride. Upon completion of the addition of the acetylacetone, the solution is brought to reflux and heated for thirty minutes, during which time the oily layer changes to an ivory-colored solid. The precipitate is removed by rapid filtration with suction 

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