Ruthenium(II) Complexes Having a Pincer‐Type Ligand with Two N‐Heterocyclic Carbene Moieties
Ruthenium(II) Complexes Having a Pincer‐Type Ligand with Two N‐Heterocyclic Carbene Moieties
复制标题
具有带有两个 N-杂环卡宾部分的钳型配体的钌 (II) 配合物
DOI：
10.1002/zaac.201800104
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Takahiko Kojima
中科院分区：
文献类型：
--
作者：
Yoshihiro Shimoyama;Tomoya Ishizuka;Hiroaki Kotani;Takahiko Kojima
合成了2,2′-联吡啶基和钳型亚甲基桥dn -杂环碳（NHC）配体的新型rui配合物，并对其进行了表征，评价了配合物的结构特征对其氧化还原和光化学性质的影响。亚甲基桥接的NHC配体呈子向配位，NHC环上的异丙基与2,2′-联吡啶配体发生了分子内CH/π相互作用，这对维持畸变配体结构起了强有力的作用。此外，这两种钌配合物在循环伏安图中表现出可逆的氧化还原波，并被电子转移氧化剂氧化生成钌配合物，并通过yepr光谱和理论分析对其进行了表征。
Two novel RuIIcomplexes, having 2,2′‐bipyridyl and a pincer‐type methylene‐bridgedN‐heterocyclic carbene (NHC) ligand, were synthesized and characterized to evaluate the effects of structural features of the complexes on their redox and photochemical properties. The methylene‐bridged NHC ligand coordinated in a meridional manner and the isopropyl groups on the NHC rings exhibited intramolecular CH/π interaction with the 2,2′‐bipyridyl ligand, which played a role to strongly maintain the distorted ligand structure. In addition, the two Ru complexes exhibited reversible redox waves in the cyclic voltammograms and they were oxidized by an electron‐transfer oxidant to afford RuIIIcomplexes, which were characterized byEPRspectroscopy and theoretical analyses.