Trinuclear Heterobimetallic Complexes with Binucleating Dithioxamides: Stereoselective Synthesis and Solution Behavior Involving Pd−N Bond Rupture
作者:Santo Lanza、Giuseppe Bruno、Francesco Nicolò、Giovanna Callipari、Giuseppe Tresoldi
DOI:10.1021/ic034233d
日期:2003.7.1
of the temperature, the trimetallic Pd-Pt-Pd complexes undergo rapid allyl isomerization; the mechanism of the isomerization, which is similar to that found by us in an analogue Pt-Pd bimetallic complex, is discussed. The crystal and molecular structure of bis-[(eta(3)-allyl)-palladium(II)](mu-bis-[S]-phenylethyl-dithioxamidate-platinum (II) kappa-S,S-kappa-S',S'-Pt-kappa-N,N-Pd-kappa-N',N'-Pd') has
类型为[Pt(HR(2)-N(2)C(2)S(2))(2)]的双螯合物铂(II)络合物(HR(2)-N(2)C(2)S( 2)(-)=二烷基-二硫代氨基甲酸酯)是对位受体,在第一个Pd(eta(3)-烯丙基)(+)部分配位后,诱导第二个钯-烯丙基片段的取向。因此,一系列式为双-[((eta(3)-烯丙基)-钯(II)](mu-双-二烷基-二硫代氨基甲酸酯-铂(II))的三金属配合物kappa-S,S-kappa-S',已经制备了S'-Pt-kappa-N,N-Pd-kappa-N',N'-Pd'),其中烯丙基片段朝向分子平面的同一侧。我们还使用由外消旋苯乙胺制得的二硫代乙酰胺制备了三金属配合物。只有两种异构体以等摩尔比产生:具有四个高手性烷基取代基的外消旋体和含有在分子平面的同一侧具有高手性取代基的内消旋二硫代乙酰胺的内消旋体。在温度的影响下,三金属Pd-Pt-Pd配合物经历快速的烯丙基异