Synthesis of N-heterocyclic carbene palladium(ii) bis-phosphine complexes and their decomposition in the presence of aryl halides
作者:Alison M. Magill、Brian F. Yates、Kingsley J. Cavell、Brian W. Skelton、Allan H. White
DOI:10.1039/b706053j
日期:——
phosphine ligands, with the rate of decomposition being nominally linked to the size of the chelate ring. The decomposition of these complexes in the presence of aryl halides-expected to yield Pd(Ar)X(P-P)-was studied and shown instead to yield PdX(2)(P-P) and [Pd(tmiy)X(P-P)]BF(4). Additionally, Pd(Me)X(P-P) and Pd(Ar)X(P-P) were observed in some cases. Intermolecular cross-over reactions between the
合成了[Pd(NHC)Me(PP)] BF(4)类型的甲基钯(II)卡宾配合物(NHC = N-杂环卡宾,PP =螯合膦),配合物[Pd(tmiy)Me(dcype) )] BF(4)(tmiy = 1,3,4,5-四甲基咪唑-2-亚基,dcype = 1,2-双(二环己基膦基)乙烷)在晶体学上具有特征。带有tmiy配体的配合物显示出与带有单齿膦配体的配合物类似的分解方式,分解速率名义上与螯合环的大小有关。研究了这些配合物在芳基卤化物的存在下的分解,预期可产生Pd(Ar)X(PP)-,反而显示出可产生PdX(2)(PP)和[Pd(tmiy)X(PP)] BF (4)。此外,在某些情况下还观察到Pd(Me)X(PP)和Pd(Ar)X(PP)。