Three-Coordinate Iron(0) Complexes with <i>N</i>-Heterocyclic Carbene and Vinyltrimethylsilane Ligation: Synthesis, Characterization, and Ligand Substitution Reactions
作者:Jun Cheng、Qi Chen、Xuebing Leng、Shengfa Ye、Liang Deng
DOI:10.1021/acs.inorgchem.9b02009
日期:2019.10.7
7-tetrahydro-1,3-diazepin-2-ylidene (7-IPr), 3). Complexes 1–3 were synthesized from the one-pot reactions of ferrous dihalides with the N-(2,6-diisopropylphenyl)-substituted NHC ligands, vtms, and KC8. Reactivity study of 1 revealed its facile ligand substitution reactions with terminal aryl alkynes, ketones, isocyanides, and CO, by which iron(0) complexes [(IPr)Fe(η2-HCCAr)] (Ar = Ph, 5; p-CH3C6H4, 6; 3,5-(CF3)2C6H3
低配位铁(0)物种被暗示为一系列铁催化有机转化的中间体。但是,配位数小于4的可分离铁(0)络合物鲜为人知。为了满足我们对带有N杂环卡宾(NHC)和烯烃连接的三配位铁(0)配合物的兴趣,我们在此报告了具有单齿烯烃配体的三配位铁(0)配合物的合成和配体取代反应性,[ (NHC)的Fe(η 2 -vtms)2 ](VTMS =乙烯基三甲基硅烷,NHC = 1,3-双(2',6'-二异丙基苯基) -咪唑-2-亚基(IPR),1 ; 1,3-二(2',6'-二异丙基苯基)-4,5-四亚甲基-咪唑-2-亚烷基(cyIPr),2; 1,3-双(2',6'-二异丙基苯基)-4,5,6,7-四氢-1,3-二氮杂-2-亚乙基(7-IPr),3)。配合物1 - 3分别从与亚铁二卤化物的一锅反应合成Ñ(2,6-二异丙基) -取代的NHC配体,VTMS,和KC - 8。的反应性研究1揭示了与末端芳炔烃,酮,胩和CO