L = PPh3, P(C4H4N)3), is described. These chelate complexes were prepared by exposure of π-allyl chloride dimers, (η3-(CH2-CX-CH2)PdCl)2, to either 1,3-butadiene or isoprene to yield π-allyl chloride dimers of the type (η3-CH2CHCRCH2CH2CH = CH(X)PdCl)2 which result from insertion of the diene into each π-allyl unit. Abstraction of chloride with either AgSbF6 or NaB(ArF)4 in the presence of L gives
摘要合成一系列阳离子“包裹”配合物η3-,η2-(
CH2-CH-CHR- - -CH CHX)Pd(II)L +(R = H,
CH3; X = H,Cl ,描述为CO 2 Me; L = PPh 3,P(C 4 H 4 N)3)。通过将π-烯丙基
氯二聚物(η3-( -CX- )PdCl)2暴露于
1,3-丁二烯或
异戊二烯以产生(η3- CHCR CH = CH(X)PdCl)2,这是由于将二烯插入每个π-烯丙基单元而产生的。在L存在下用AgSbF6或NaB(ArF)4提取
氯化物可以高收率得到阳离子包裹复合物。8a(R = – ,X = –Cl,L = PPh3)和9a(R = –H,X = –Cl,L = PPh3)的单晶X射线衍射研究表明Pd(II)基本上采用正方形的平面几何形状和螯合臂相对于烯丙基单元处于同一个方向。将这些环绕配合物暴露于不同碱性的腈中