Complexation-induced conformational regulation of ferrocene-dipeptide conjugates to nucleate γ-turn-like structure

The complexation of the ferrocene-dipeptide conjugate bearing one dipeptide chain of heterochiral sequence (-l-Ala-d-Pro-NHPy) with PdCl2(MeCN)2 was demonstrated to afford the 2:1 trans palladium complex, which is present in the pseudo-helical conformation and γ-turn-like structure in the crystal structure through complexation and intramolecular hydrogen bonding. Furthermore, the left-handed pseudo-helical molecular arrangement was formed through a network of intermolecular hydrogen bonds.