Molybdenum(II) Complexes with α‐Diimines: Catalytic Activity in Organic and Ionic Liquid Solvents
作者:Marta S. Saraiva、Carla D. Nunes、Vítor Félix、Ana P. C. Ribeiro、Carlos Nieto Castro、Maria José Calhorda
DOI:10.1002/ejic.201800700
日期:2018.9.23
The new [MoX(η3‐C3H5)(CO)2(α‐diimine)] complexes with: (i) X = Br or triflate and α‐diimine = 1,10‐phenanthroline (phen) and dipyridophenazine (dppz); and (ii) X = Br and α‐diimine = phen and dppz, with several substituents, are synthesized and characterized. The structures of [MoBr(η3‐C3H5)(CO)2(Cl‐phen)] and [Mo(CF3SO3)(η3‐C3H5)(CO)2(dppz)] are determined by using single‐crystal X‐ray diffraction
新的[MOX(η 3 -C 3 H ^ 5)(CO)2(α-二亚胺)]配合物的:(ⅰ)X = Br或三氟甲磺酸酯和α二亚胺= 1,10-菲咯啉(phen)的和二吡啶并( dppz); (ii)合成并表征了X = Br和α-diimine= phen和dppz,带有多个取代基。[MOBr(η的结构3 -C 3 H ^ 5)(CO)2(CL-phen)的]和[沫(CF 3 SO 3)(η 3 -C 3 H ^ 5)(CO)2(dppz)]是通过使用单晶X射线衍射确定的。在二氯甲烷中几种烯烃的均相催化环氧化中测试了2,3'和2,2'-联吡啶基(bpy)的这三种配合物及其两个具有Me和t Bu取代基的衍生物,通常显示出对各个烯烃的良好选择性。环氧和相对较低的TOF。首次在某些室温离子液体(RTIL)中也进行了其中一些催化剂对顺式环辛烯的氧化反应。在[MOBr(η存在3 -C 3 H ^ 5)(CO
Synthesis and Chiroptical Properties of Quinoxaline‐Fused Polyaza[5]–[7]helicenes with Orange‐Color CPL Emissions
achieved a two‐type synthesis of quinoxaline‐fused polyaza[5]‐ and [7]helicenes through consecutive N−H/C−H coupling with a hypervalent iodine reagent as a key reaction. By fusing electron‐deficient quinoxaline, these polyazahelicenes constitute an efficient donor‐acceptor type of molecule with absorption edges that reach up to approximately 650 nm. Evaluating the chiroptical properties reveals that the