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|Section2= |Section3= |Section4= |Section7= |Section8= }} Rhodium(III) chloride refers to inorganic compounds with the formula RhCl3(H2O)n, where n varies from 0 to 3. These are diamagnetic solids featuring octahedral Rh(III) centres. Depending on the value of n, the material is either a dense brown solid or a soluble reddish salt. The soluble salt is widely used to prepare compounds used in homogeneous catalysis, notably for the industrial production of acetic acid. ==Structures== Hydrated rhodium trichloride usually refers to compound with the approximate formula RhCl3(H2O)3. 103Rh NMR spectroscopy shows that solutions of this material consist of several species, the proportions of which change with time and depend on the concentration of chloride. The relative distribution of these species determines the colour of the solutions, which can range from yellow (the hexaaquo ion) to "raspberry-red". Some of these species are ()3+, ()2+, ''cis''- and ''trans''-()+, and ().〔Christopher Carr, Julius Glaser, Magnus Sandström "103Rh NMR chemical shifts of all ten ()3−n complexes in aqueous solution" ''Inorganica Chimica Acta'', 1987; vol. 131, pp. 153–156 〕 Individual ions have been separated by ion exchange chromatography. Anhydrous rhodium chloride crystallises with a monoclinic crystal structure, as in YCl3 and AlCl3. It is a dense brown solid that is insoluble in common solvents and of little value in the laboratory. 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「Rhodium(III) chloride」の詳細全文を読む スポンサード リンク
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