title: Discrete sandwich compounds of monolayer palladium sheets.
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.
authors.affiliation: 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
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Murahashi
authors.forename: Mayu
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Masa-Aki
authors.initials: MA
authors.lastname: Oka
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Hashimoto
authors.forename: Tomohito
authors.initials: T
authors.lastname: Uemura
authors.forename: Yasuki
authors.initials: Y
authors.lastname: Tatsumi
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Nakao
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ikeda
authors.forename: Shigeyoshi
authors.initials: S
authors.lastname: Sakaki
authors.forename: Hideo
authors.initials: H
authors.lastname: Kurosawa