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Formation of iron(III)–thiolate metallocyclophane using a ferrocene-based bis-isocyanide
New Journal of Chemistry ( IF 3.3 ) Pub Date : 2020-09-28 , DOI: 10.1039/d0nj03967e
Yen-Chung Huang, Wan-Yu Lan, Wei-Min Ching, Sodio C. N. Hsu

Two ferrocene–isocyanide ligands, 1-isocyanoferrocene (FcNC) and 1,1′-diisocyanoferrocene [Fc(NC)2], were observed to react with the redox active iron–thiolate core complexes [(CpFe)2(μ-SEt)2(CH3CN)2][BF4]2 (1[BF4]2) to form the respective ferrocenyl–isocyanide adducts, [(CpFe)2(μ-SEt)2(FcNC)2][BF4]2 (2[BF4]2) and [(CpFe)2(μ-SEt)2(Fc(NC)2)][BF4]2 (3[BF4]2). By using ESI-MS, we demonstrated that the kinetic product in the route for the formation of 3[BF4]2 from 1[BF4]2 and Fc(NC)2 is complex [(CpFe)2(μ-SEt)2(Fc(NC)2)2][BF4]2 (4[BF4]2). The kinetic product, 4[BF4]2, would gradually transform to its corresponding thermodynamic product (3[BF4]2) due to the syn-orientation effect of Fc(NC)2 and syn ligand directed binding site of the iron–thiolate core system. The results of structural, spectroscopic and electrochemical characterization of new iron–thiolate core complexes are described. Chemical reduction and oxidation reactions of 2[BF4]2 and 3[BF4]2 were examined to elucidate the nature of the species generated in the electrochemical measurement.

中文翻译:

使用二茂铁基双异氰酸酯形成铁(III)-硫醇盐金属环烷

观察到两个二茂铁-异氰化物配体1-异氰基二茂铁(FcNC)和1,1'-二异氰基二茂铁[Fc(NC)2 ]与氧化还原活性铁-硫醇盐核心配合物[(CpFe)2(μ-SEt)2(CH 3 CN)2 ] [BF 4 ] 21 [BF 4 ] 2)形成相应的二茂铁基-异氰酸酯加合物,[(CpFe)2(μ-SEt)2(FcNC)2 ] [BF 4 ] 22 [BF 4 ] 2)和[(CpFe)2(μ-SEt)2(Fc(NC)2)] [BF 4 ] 23 [BF 4 ] 2)。通过使用ESI-MS,我们证明了从1 [BF 4 ] 2和Fc(NC)2形成3 [BF 4 ] 2的路线中的动力学产物是复杂的[(CpFe)2(μ-SEt)2(Fc(NC)22 ] [BF 4 ] 24 [BF 4 ] 2)。动力学乘积4 [BF 4] 2,将逐渐转变成其相应的热力学产物(3 [BF 4 ] 2),由于顺式的Fc的-orientation效果(NC)2SYN铁硫醇盐核心系统的配体定向结合位点。描述了新的硫醇铁核心配合物的结构,光谱和电化学表征结果。检查了2 [BF 4 ] 23 [BF 4 ] 2的化学还原和氧化反应,以阐明电化学测量中产生的物质的性质。
更新日期:2020-10-19
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