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An Iodido‐Bridged Dimer of Cubane‐Type RuIr3S4 Cluster: Structural Rearrangement to New Octanuclear Core and Catalytic Reduction of Hydrazine
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2019-12-23 , DOI: 10.1002/ejic.201901146
Hidetake Seino 1 , Keiichi Hirata 2 , Yusuke Arai 1 , Risa Jojo 1 , Masaaki Okazaki 3
Affiliation  

Nitrogen‐fixing enzymes contain octanuclear metal–sulfur clusters at the active site, which are constructed on the basis of combined two cubic M4S3C skeletons. In this study, the dimer of cubane‐type RuIr3S4 cluster [{(Cp*Ir)33‐S)4Ru}22‐I)3]I (2: Cp* = η5‐C5Me5) was synthesized via oxidation of [(Cp*Ir)33‐S)4(CymRu)] (Cym = η6piPrC6H4Me) with I2 followed by ligand exchange. Two cubane cores are bridged by three iodido ligands in 2, while these cubes are fused into a unique Ru2Ir6S8 framework by 2e‐reductuion to give [(Cp*Ir)6Ru23‐S)8][I]2. Addition of excess PhNHNH2 to 2 cleaved the dimer structure to form the hydrazine adduct of single cubane [(Cp*Ir)33‐S)4{RuI(NH2NHPh)2}]I. Reduction of N2H4 with Cp2Co and [HNEt3][BF4] was catalyzed by 2 in much higher rate than disproportionation of N2H4. The molecular structures of all new cluster compounds were characterized by X‐ray diffraction studies.

中文翻译:

古巴型RuIr3S4簇的碘桥二聚体:新八核核的结构重排和肼的催化还原

固氮酶在活性位点含有辛核金属-硫簇,这些簇是在结合两个立方M 4 S 3 C骨架的基础上构建的。在这项研究中,立方烷型RuIr的二聚体3小号4簇[{(CP * Ir)的3(μ 3 -S)4的Ru} 2(μ 2 -I)3 ] I(2:的Cp * =η 5 -C 55)通过[(CP * Ir)的氧化合成3(μ 3 -S)4(库姆)](CYM =η 6 - p -PrC 6 H 4 Me)与I 2进行配体交换。两个古巴核心被2中的三个碘配体桥连,而这些立方体通过2e还原被融合成独特的Ru 2 Ir 6 S 8骨架,从而得到[(Cp * Ir)6 Ru 2(µ 3 -S)8 ]。 [I] 2。向2中添加过量的PhNHNH 2会裂解二聚体结构,从而形成单个古巴[[Cp * Ir)3(µ 3 -S)4 {RuI(NH 2 NHPh)2}]一世。N中的还原2 ħ 4再用Cp 2 Co和[HNET 3 ] [BF 4 ]通过催化2高得多的速率小于N的歧化2 ħ 4。所有新的簇状化合物的分子结构都通过X射线衍射研究进行了表征。
更新日期:2019-12-23
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