钌多氢化合物的低温FTIR光谱研究

LOW TEMPERATURE FTIR STUDY OF THE STRUCTURE OF RUTHENIUM POLYHYDRIDES

在氢气氛下合成了新化合物Ｒｕ２Ｈ４（ＣＯ）（ＰＰｈ３）４，建立了可至液氮温度的原位红外测试装置，在室温至液氮温度下进行了钌多氢化合物的结构研究。发现ＲｕＨ４（ＣＯ）（ＰＰｈ３）３在室温下会发生分子氢与原子氢的结构流变。

A novel compound of Ru 2H 4(CO)(PPh 3) 4(A) is synthesized under hydrogen atmosphere.An in situ infrared apparatus which can be operated at liquid nitrogen temperarure is established.The structural conversion of RuH 4(PPh 3) 3 between dihydrogen and dihydride is observed firstly at room temperature.It is suggested that a fluxional molecule between terminal and bridged hydrogen appears in (A) with temperature changes.H 2 molecule coordinated in ruthenium complex is rather easy to be substituted by CO,N 2 and small organic molecule,this property is very important for activing molecular hydrogen and using in hydrogenation of unsaturated compounds.