Palladium(II) driven self-assembly of a saturated quadruple-stranded metallo helicate

Complexation of the bridging bidentate ligand N,N'-(pyridine- 2,6-diyl)dinicotinamide, L with palladium(II) resulted in a single discrete M2L4 self-assembly, 1, in a quantitative manner. The entropically-controlled assembly of 1 resulted in a rare saturated, quadruple-stranded metallo-helicate, in which both the left-handed (M) and right-handed (P) helicates exist in the crystal structure.