论文部分内容阅读
我们曾经用氢化钠还原双(环戊二烯基)氯化镥,与Schumann报道的结果不同,得到中性的双(环戊二烯基)氢化镥二聚体,[Cp_2LuH·OC_4H_8]_2(Cp=环戊二烯基),并且它能还原烯烃。然而,将有机镥氢化物在四氢呋喃中重结晶时,除了得到氢化物单晶外,还获得少量三茂镥四氢呋喃配合物,它可能是二茂氯化镥的岐化产物。从而我们设想三茂镥-氢化钠体系可能有还原烯烃的作用。本文报道九种烯土有机配合物,Cp_3Ln(Ln=La,Pr,Nd,Sm,Tb,Y,Er,Yb和Lu),与氢化钠组成一种新的还原体系,与烯烃进行还原反应的结果。Cp_3Ln-NaH体系在45℃,四氢呋喃溶液中都能程度不同的将1-已烯还原成己烷。其结果见表1.从表1中可以看出,还原活性与稀土金属三价离子的离子半径密切相关。总的来
We have previously used sodium hydride to reduce bis (cyclopentadienyl) thulium chloride, in contrast to the results reported by Schumann, resulting in a neutral bis (cyclopentadienyl) hydride dimer, [Cp 2 LuH · OC 4 H 8] 2 Cp = cyclopentadienyl), and it can reduce olefins. However, when the organonium hydride is recrystallized in tetrahydrofuran, a small amount of trimanganate tetrahydrofuran complex is obtained, which may be the disproportionation product of acenaphthene chloride, in addition to the hydride single crystal. Thus we envisage that trimacrolein-sodium hydride system may have the effect of reducing olefins. In this paper, nine new ternary complexes of organotin compounds, Cp_3Ln (Ln = La, Pr, Nd, Sm, Tb, Y, Er, Yb and Lu), are reported to form a new reduction system with sodium hydride result. The Cp_3Ln-NaH system can reduce 1-hexene to hexane to different extent in tetrahydrofuran solution at 45 ℃. The results are shown in Table 1. As can be seen from Table 1, the reduction activity is closely related to the ionic radius of the rare earth metal trivalent ions. Overall