Discrete sandwich compounds of monolayer palladium sheets
Discrete sandwich compounds of monolayer palladium sheets
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DOI：
10.1126/science.1125245
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发表时间：
2006-08-25
期刊：
影响因子：
56.9
通讯作者：
Kurosawa, Hideo
中科院分区：
文献类型：
--
作者：
Murahashi, Tetsuro;Fujimoto, Mayu;Kurosawa, Hideo
尽管存在大量的“双”配合物，其中两个环状芳烃配体位于金属中心的侧翼，但该基序尚未扩展到多个金属原子的片。我们制备并分离了两个这样的化合物。在第一个，三个钯中心形成一个平面的三角形阵列，由氯化物，两个环庚三烯基配体之间。在第二种结构中，五钯片在两个并四苯环之间采用共边的三角梯形骨架。通过X射线晶体学和核磁共振光谱对化合物进行了表征。通过量子计算分析了团簇中成键的性质。
Despite the abundance of "sandwich'' complexes, in which two cyclic aromatic hydrocarbon ligands flank a metal center, this motif has not been extended to sheets of multiple metal atoms. We prepared and isolated two such compounds. In the first, three palladium centers form a planar triangular array, capped by chlorides, between two cycloheptatrienyl ligands. In the second, a pentapalladium sheet adopts an edge-sharing triangle-trapezoid skeleton between two naphthacene rings. The compounds were characterized by x-ray crystallography and nuclear magnetic resonance spectroscopy. The nature of bonding in the clusters was analyzed by quantum calculations.