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|Section2= |Section3= }} Tris(ethylenediamine)cobalt(III) chloride is a coordination complex with the formula ()Cl3 (where "en" is the abbreviation for ethylenediamine). This complex was important in the history of coordination chemistry because of its stability and its stereochemistry. Many different salts have been described. The complex was first described by Alfred Werner who isolated this salt as yellow-gold needle-like crystals. ==Synthesis and structure== The compound is prepared from an aqueous solution of ethylenediamine and virtually any cobalt(II) salt, such as cobalt(II) chloride. The solution is purged with air to oxidize the cobalt(II)-ethylenediamine complexes to cobalt(III). The reaction proceeds in 95% yield, and the trication can be isolated with a variety of anions. A detailed product analysis of a large-scale synthesis revealed that one minor by-product was ()Cl3, which contains a rare monodentate ethylenediamine ligand (protonated). The cation ()3+ is octahedral with Co-N distances in the range 1.947–1.981 Å. The N-Co-N angles are 85° within the chelate rings and 90° between nitrogen atoms on adjacent rings. 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「Tris(ethylenediamine)cobalt(III) chloride」の詳細全文を読む スポンサード リンク
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