approaches leading to small deviations from coplanarity. The removal of one coordinated chloride in [NiCl2(cis-dppen)] by AgBF4 followed by subsequent treatment with bis(diphenylphosphino)amine, NH(PPh2)2 (dppam), leads to the novel complex [NiCl(cis-dppen) (dppam)](BF4) (4). However, the analogous abstraction of both chlorides in [MCl2(cis-dppen)] (M Pd, Pt) and reaction with dppam produces [M(cis-dppen)(dppam)](BF4)2
摘要制备了顺式或反式1,2-双(
二苯基膦基)
乙烯(顺式或反式dppen)的单核和双核NiII,PdII和PtII配合物,并通过X射线衍射法对其进行了表征[19; Pt] 1H和31P 1H NMR光谱,FAB质谱,IR光谱,元素分析和熔点。给出了[M(CN)2(cis-dppen)]类型(M Ni(1),M Pd(2),M Pt(3))的一些罕见实例的顺式-二
氰化物配合物的X射线结构首次。所有三个晶格都是同构的,可以比较Ni,Pd和Pt原子的半径。在1-3中,协调是方形平面。在所有情况下,
乙烯桥都几乎与配位面共面,这可以通过π键相互作用来解释。由于同晶的晶格,图1–3显示了类似的最短分子间排斥C–H···M接触方法,导致与共面性的微小偏差。用
AgBF4除去[NiCl2(顺式-dppen)]中的一种配位
氯化物,然后用双(
二苯基膦基)胺NH(PPh2)2(dppam)处理,得到了新的络合物[NiCl(顺式-dppen)(