Synthesis, Structures, and Catalytic Properties of Ionic Metallacyclodimeric Palladium(II) Complexes
作者:Sung Min Kim、Kyung Hwan Park、Haeri Lee、So Yun Moon、Ok-Sang Jung
DOI:10.5012/bkcs.2012.33.12.4069
日期:2012.12.20
Metallacyclodimeric complexes of $[(Me_4en)Pd(L)]_2(ClO_4)_4$ ($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; L = dimethylbis(4-pyridyl)silane (dmps), methylvinylbis(4-pyridyl)silane (mvps)) have been synthesized, and their structures have been characterized by X-ray single crystallography. The skeletal structures consist of one 20-membered metallamacrocycle, two 5-membered metallacycles, and four pyridyl groups. The local geometry around the palladium(II) ion approximates to a typical square planar arrangement with four nitrogen donors. Delicate difference in catalytic effects on hydrogenation was investigated based on the structure of catalyst and substrates.
$[(Me_4en)Pd(L)]_2(ClO_4)_4$($Me_4en$ = N,N,N',N'-四甲基乙二胺;L = 二甲基双(4-吡啶基)硅烷 (dmps),甲基乙烯基双(4-吡啶基)硅烷 (mvps))已被合成,其结构已通过 X 射线单晶学进行了表征。它们的骨架结构由一个 20 元金属环、两个 5 元金属环和四个吡啶基组成。钯(II)离子周围的局部几何结构近似于典型的方形平面布置,有四个氮供体。根据催化剂和底物的结构,研究了氢化催化效果的微妙差异。