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| Section2 = | Section3 = | Section7 = | Section8 = }} Pentamethylcyclopentadienyl iridium dichloride is an organometallic compound with the formula ()2, commonly abbreviated ()2 This bright orange air-stable diamagnetic solid is a reagent in organometallic chemistry.〔 ==Preparation, structure, reactions== The compound has C2h symmetry. Each metal is pseudo-octahedral. It was first prepared by the reaction of hydrated iridium trichloride with hexamethyl dewar benzene.〔 〕 More conveniently, iridium trihydrate and pentamethylcyclopentadiene consistently gives the product in both high yield and purity according to this idealized equation: :2 Cp *H + 2 IrCl3(H2O)3 → ()2 + 2 HCl + 6 H2O The two Ir-μ-Cl bonds are labile and can be cleaved to give a variety of adducts of the general formula Cp *IrCl2L. Such adducts undergo further substitution to afford cations ()+ and ()2+. The chloride ligands can also be replaced by other anions such as carboxylates, nitrite, and azide. Reduction of ()2 under an atmosphere of CO affords the dicarbonyl Cp *Ir(CO)2], which can be decarbonylated to give the unsaturated derivative ()2. Treatment of ()2 with borohydride under an atmosphere of H2 gives the iridium(V) derivative Cp *IrH4. ()2 is a precursor to catalysts for the asymmetric transfer hydrogenation of ketones. 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「Pentamethylcyclopentadienyl iridium dichloride dimer」の詳細全文を読む スポンサード リンク
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