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|Section2= |Section3= |Section7= |Section8= }} Cerium(III) chloride (CeCl3), also known as cerous chloride or cerium trichloride, is a compound of cerium and chlorine. It is a white hygroscopic solid; it rapidly absorbs water on exposure to moist air to form a hydrate, which appears to be of variable composition,〔Several major manufacturers such as Alfa and Strem list their products simply as a "hydrate" with "xH2O" in the formula, but Aldrich sells a heptahydrate.〕 though the heptahydrate CeCl3·7 H2O is known. It is highly soluble in water, and (when anhydrous) it is soluble in ethanol and acetone. ==Preparation of anhydrous CeCl3== Simple rapid heating of the hydrate alone may cause small amounts of hydrolysis. A useful form of anhydrous CeCl3 can be prepared if care is taken to heat the heptahydrate gradually to over many hours under vacuum.〔 This may or may not contain a little CeOCl from hydrolysis), but it is suitable for use with organolithium and Grignard reagents. Pure anhydrous CeCl3 can be made by dehydration of the hydrate either by slowly heating to with 4–6 equivalents of ammonium chloride under high vacuum,〔 or by heating with an excess of thionyl chloride for three hours.〔 The anhydrous halide may alternatively be prepared from cerium metal and hydrogen chloride. It is usually purified by high temperature sublimation under high vacuum. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cerium(III) chloride」の詳細全文を読む スポンサード リンク
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