Discrete sandwich compounds of monolayer palladium sheets |
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| Authors: | Murahashi Tetsuro Fujimoto Mayu Oka Masa-Aki Hashimoto Yasuhiro Uemura Tomohito Tatsumi Yasuki Nakao Yoshihide Ikeda Atsushi Sakaki Shigeyoshi Kurosawa Hideo |
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| Institution: | Department of Applied Chemistry, Graduate School of Engineering, Osaka University, and PRESTO, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan. tetsu@chem.eng.osaka-u.ac.jp |
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| Abstract: | 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. |
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