Second sphere supramolecular chirality:: racemic hybrid H-bonded 2-D molecular networks

Neutral hybrid 2-D networks have been generated using a bis-amidinium capable of chelating M(CN)(6)(3-) anions via hydrogen bonds: the packing of the achiral 2-D networks leads to channels which are occupied by water molecules forming polymeric H-bonded chains; furthermore, owing to the dihapto mode of H-bonding, the presence of supramolecular chirality of the Delta' and L Lambda' types taking place within the second coordination sphere of the metallic centre has been demonstrated.