C-H Center Dot Center Dot Center Dot Ni-Ii Interaction-Driven Homochiral M And P Helices Of Neutral (R,R)-And (Ss)-Bis(Pyrrol-2-Ylmethyleneamino)Cyclohexane Ni-Ii Complexes

Reaction of (R,R)- and (S,S)-bis(pyrrol-2-ylmethyleneamino)-cyclohexane with Ni-II(OAc)(2)center dot 4H(2)O afforded enantiomeric nickel(II) Schiff-base complexes (R,R)-1 and (S,S)-1, respectively. Rare C-H center dot center dot center dot Ni-II interactions were found to be responsible for the facile formation of homochiral M and P helices of the neutral, chiral, mononuclear complexes in crystal lattices. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007).