Two chiral multinuclear palladium(II) complexes comprising alternately arranged isomerous hexanuclear clusters

Two new chiral hexanuclear palladium(II) complexes [Pd6(Cys)4(CysH)4][Pd6(CysH)8]Cl4·24H2O (1) and [Pd6(HCys)10](NO3)2·11H2O (2) are prepared through careful control of the reaction conditions. Both complexes comprise two alternately arranged isomerous hexanuclear Pd(II) clusters. As supported by ESI-MS spectra and CD analyses, the integrity of the structures can be maintained in aqueous solution and the chirality of L-Cys ligands can be preserved to the multinuclear Pd complexes.