Synthesis, structure and reactivity of the homoleptic iron(II) complex of the novel 4′-(4‴-pyridyl-N-oxide)-2,2′:6′,2″-terpyridine ligand
作者:Jesús Pitarch López、Werner Kraus、Günter Reck、Andreas Thünemann、Dirk G. Kurth
DOI:10.1016/j.ica.2005.04.034
日期:2005.8
Abstract The newligand4′-(4‴-pyridyl-N-oxide)-2,2′:6′,2″-terpyridine (pyNoxterpy) and its homoleptic iron(II) complex have been synthesised, and structural and spectroscopic studies have been carried out. The obtained results have been compared with the reported data for the parent ligand4′-(4‴-pyridyl)-2,2′:6′,2″-terpyridine (pyterpy) and its homoleptic iron(II) complex. Significant differences
A sizeselectivity in the coordination of different lanthanides ions to the two donor sites of the ditopic pyterpyNO ligand has been evidenced in heteronuclear complexes of formula RE2RE*2(tta)12(pyterpyNO)2, where smaller (larger) ions normally display a higher affinity for the eight (nine)-coordinated oxygen (nitrogen) site. The present results, obtained in solution and in the solid state with a
在式 RE 2 RE* 2 (tta) 12 (pyterpyNO) 2的异核络合物中,已经证明了不同镧系元素离子与双位 pyterpyNO 配体的两个供体位点配位的尺寸选择性,其中较小(较大)的离子通常显示对八(九)配位氧(氮)位点具有更高的亲和力。目前的结果是通过多种技术方法(X 射线衍射、 19 F NMR、磁力测定和光致发光)在溶液和固态中获得的,与所采用的合成路线无关。