Synthesis of triangular tripalladium cations as noble-metal analogues of the cyclopropenyl cation.
The first C3 -symmetric 44-core-valence-electron triangular palladium clusters, [{(SAr')(PAr3 )Pd}3 ](+) , have been synthesized by activation of the CS bond of isothioureas. Owing to delocalized metal-metal bonding, these stable complexes are the first noble-metal analogues of the π-aromatic cyclopropenyl cation [C3 H3 ](+) , with their all-metal aromaticity involving d-type atomic orbitals.
UPMC Sorbonne Universités, IPCM (UMR CNRS 7201), 4 place Jussieu, C. 229, 75005 Paris (France).
Sébastien
S
Blanchard
Louis
L
Fensterbank
Geoffrey
G
Gontard
Emmanuel
E
Lacôte
Giovanni
G
Maestri
Max
M
Malacria
aromaticity; cluster compounds; metal-metal interactions; metallacycles; palladium