The reaction of [Ru₃(CO)₁₂] (1) with six equiv. of FcC(O)CH₂C(O)R (2a, R = Me; 2b, R = Fc; Fc = Fe(η⁵‐C₅H₄)(η⁵‐C₅H₅)) produced the Ru^II compounds [Ru(CO)₂(FcC(O)CHC(O)R)₂] (3a, R = Me; 3b, R = Fc) in moderate yields. IR studies and single‐crystal X‐ray analysis (3a) confirmed that the CO ligands are cis‐oriented and that the respective β‐diketonates O,O'‐chelate‐bonded setting‐up an octahedral surrounding at Ru^II. Electrochemical (cyclic and square‐wave voltammetry) and spectroelectrochemical (UV/Vis‐NIR, IR) measurements were additionally carried out. Compounds 3a,b display two (3a: E₁^o' = 140; E₂^o' = 255 mV; ΔE^o' = 115 mV for [3a]⁺/[3a]²⁺) or four (3b: E₁^o' = 80 mV, E₂^o' 190 mV (ΔE^o' = 110 mV, [3b]⁺/[3b]²⁺), E₃^o' = 355 mV (ΔE^o' = 165 mV, [3b]²⁺/[3b]³⁺), E₄^o' = 490 mV (ΔE^o' = 135 mV, [3b]³⁺/[3b]⁴⁺)) electrochemical reversible one‐electron redox processes indicating electrostatic interactions among the ferrocenyl groups as oxidation progresses, which was confirmed by UV/Vis‐NIR and in situ IR spectroscopy. One ferrocenyl group on each β‐diketonate ligand is by this means 1^st oxidized before the 2^nd ferrocenyl group of the same β‐diketonate building block follows.

中文翻译：

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钌（II）二羰基双（二茂铁基-β-二酮酸酯）的合成及电化学研究

[Ru ₃（CO）₁₂ ]（1）与六当量反应 FCC的（O）CH ₂ C（O）R（图2a，R =甲基;图2b，R = Fc筛选; FC =铁（η ⁵ -C ₅ H ^ ₄）（η ⁵ -C ₅ H ^ ₅））中产生的钌^II化合物[Ru（CO）₂（FcC（O）CHC（O）R）₂ ]（3a，R = Me；3b，R = Fc）以中等收率得到。红外研究和单晶X射线分析（3a）证实，CO配体是顺式的，各自的β-二酮O， O'-螯合键合-在Ru ^II处设置八面体。另外进行了电化学（循环伏安法和方波伏安法）和光谱电化学（UV / Vis-NIR，IR）测量。化合物3a，b显示两个（3a：E ₁ ^o '= 140; E ₂ ^o '= 255 mV;对于[ 3a ] ⁺ / [ 3a ] ²⁺）ΔE ^o '= 115 mV或四个（3b：E ₁ ^ø '= 80毫伏，ë ₂ ^ö ' 190毫伏（Δ Ë^o '= 110 mV，[ 3b ] ⁺ / [ 3b ] 2 ⁺），E ₃ ^o '= 355 mV（ΔE ^o '= 165 mV，[ 3b ] ²⁺ / [ 3b ] ³⁺），E ₄ ^o '= 490 mV（ΔE ^o '= 135 mV，[ 3b ] ³⁺ / [ 3b ] ⁴⁺））电化学可逆的单电子氧化还原过程表明二茂铁基之间的静电相互作用随着氧化的进行而被UV / Vis-NIR和原位红外光谱。在每个β二酮配位体之一二茂铁基是通过该装置1^第一氧化的2之前^第二同β二酮积木的二茂铁基如下。