Synthesis of Triangular Tripalladium Cations as Noble-Metal Analogues of the Cyclopropenyl Cation

摘要

The first C3-symmetric 44-core-valence-electron triangular palladium clusters, [((SAr~1)(PAr3)PdJ3J~+, have been synthesized by activation of the CS bond of isothioureas. Owing to delocalized metal-metal bonding, these stable complexes are the first noble-metal analogues of the π-aromatic cyclopropenyl cation [C3H3J~+, with their all-metal aromaticity involving d-type atomic orbitals.