Water–chloride interactions: Left- and right-handed aqua-chloro supramolecular helices anchored by a chiral Schiff-base nickel complex

Both left- and right-handed supramolecular aqua-chloro helices, formed by hydrogen bonding interactions, are anchored by a new chiral Schiff-base nickel complex [NiL] in the compound [NiL] · 2HCl · 7H2O (1) (see scheme 1 for L); The asymmetric unit in the crystal structure of compound 1 contains fourteen non-coordinated water molecules and four hydrochloric acid molecules. All water molecules and chloride anions, present in the crystal lattice of 1, are exclusively involved in hydrogen bonding interactions.