作者:Rudolf Taube、Jörg-Peter Gehrke、Reiner Radeglia
DOI:10.1016/0022-328x(85)80206-0
日期:1985.8
η3-allylbis(triarylphosphite)nickel(II) complexes with butadiene under chain propagation to give the polybutadienyl complex, [3-RC3H4Ni(P(OAr)3)2]PF6, was monitored by 31P NMR spectroscopy. In the case of the triphenylphosphite complex both the anti- and the syn-configuration could be identified by means of their different AB spectra. The anti-syn isomerization, the higher reactivity of the thermodynamically
的η的反应3 -allylbis与丁二烯(三芳基亚磷酸酯)合镍(II)配合下链增长,得到聚丁二烯复杂,[3-RC 3 ħ 4的Ni(P(OAR)3)2 ] PF 6,被监测的31 P NMR光谱。在的亚磷酸三苯酯复合两种情况下的反-和SYN构型可以通过各自不同的AB光谱来确定。所述抗顺式异构化,在热力学上更稳定的更高的反应性顺式-形式,并且形成抗还证明了每个丁二烯插入步骤的结构。从这些观察结果中,可以首次得出反式调节的实验基础,以反syn异构化为速率确定步骤。