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|Section2= |Section3= |Section7= |Section8= }} Hexaamminecobalt(III) chloride is the chemical compound with the formula ()Cl3. This coordination compound is considered an archetypal "Werner complex", named after the pioneer of coordination chemistry, Alfred Werner. This salt consists of ()3+ trications with three Cl− anions. The term "ammine" refers to ammonia in its metal complexes, and the prefix hex (Greek: six) indicates that there are six ammonias per cation. Originally this compound was described as a "luteo" (Latin: yellow) complex, but this name has been discarded as modern chemistry considers color less important than molecular structure. Other similar complexes also had color names, such as purpureo (Latin: purple) for a pentammine complex, and praseo (Greek: green) and violeo (Latin: violet) for two isomeric tetrammine complexes. 〔Huheey James E., "Inorganic Chemistry" (3rd edition 1983), p.360〕 ==Properties and structure== ()3+ is diamagnetic, with a low-spin octahedral Co(III) center. The cation obeys the 18-electron rule and is considered to be a classic example of an exchange inert metal complex. As a manifestation of its inertness, ()Cl3 can be recrystallized unchanged from concentrated hydrochloric acid: the NH3 is so tightly bound to the Co(III) centers that it does not dissociate to allow its protonation. In contrast, labile metal ammine complexes, such as ()Cl2, react rapidly with acids reflecting the lability of the Ni(II)-NH3 bonds. Upon heating, hexamminecobalt(III) begins to lose some of its ammine ligands, eventually producing a stronger oxidant. The chlorides in ()Cl3 can be exchanged with a variety of other anions such as nitrate, bromide, and iodide to afford the corresponding ()X3 derivative. Such salts are bright yellow and display varying degrees of water solubility. 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「Hexamminecobalt(III) chloride」の詳細全文を読む スポンサード リンク
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