作者:Yingjie Zhao、Xin Yu、Huilan Hu、Xinlong Hu、Sakthi Raje、Raja Angamuthu、Chen-Ho Tung、Wenguang Wang
DOI:10.1016/j.cclet.2018.03.013
日期:2018.11
2-Cy2PC6H4SMe)(PPh3)(CO)3]+ ([2]+) was synthesized. Reduction of [2]+ provided the neutral tri-substituted Fe(I)Fe(I) compound 2. The substitution of the CO in 1 ligand by PPh3 results in an anodic shift of the FeIIFeI/FeIFeI couple of 470 mV. Most importantly, this substitution also leads to the Fe-Fe bonds in 1 and 2 with large Lewis basicity difference, i.e. ΔpKaMeCN ∼ 10.
摘要以Fe2(Me2pdt)(1,2-Cy2PC6H4SMe)(CO)4(Me2pdt = Me2C(CH2S-)2,1)为基础,合成了一系列带有膦硫醚螯合配体的2Fe3S}配合物。即使对[Fe(I)Fe(II)] + / 0对,二取代的Fe(I)Fe(I)化合物1也显示出可逆的单电子氧化还原。基于1到[1] +的氧化,三取代的[Fe(I)Fe(II)] +阳离子络合物[Fe2(Me2pdt)(1,2-Cy2PC6H4SMe)(PPh3)(CO)3] +合成了[[2] +)。还原[2] +可得到中性三取代的Fe(I)Fe(I)化合物2。PPh3取代1个配体中的CO导致FeIIFeI / FeIFeI对的阳极位移为470 mV。最重要的是,这种取代还导致1和2中的Fe-Fe键具有较大的Lewis碱度差,即ΔpKaMeCN〜10。