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Gold(I,III) chloride : ウィキペディア英語版 | Gold(I,III) chloride
|Section2= }} Gold(I,III) chloride is a black solid with the chemical formula Au4Cl8. It is an example of a mixed valence compound as it contains gold in two different oxidation states; square-planar gold(III) and almost linear gold(I). The compound must be handled carefully as it is photosensitive as well as extremely air and moisture sensitive. ==Synthesis== Gold(I,III) chloride may be prepared by the reaction of gold(III) chloride with gold carbonyl chloride or carbon monoxide at room temperature in thionyl chloride. Au2(CO)Cl4 + Au2Cl6 → COCl2 + Au4Cl8 2 Au2Cl6 + 2 CO → Au4Cl8 + 2 COCl2
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