[Ni2O( l -Asp)(H2O)2]·4H2O: A Homochiral 1D Helical Chain Hybrid Compound with Extended Ni−O−Ni Bonding

The hydrothermally synthesized 1D homochiral nickel aspartate oxide [Ni2O(l-Asp)(H2O)2].4H2O is based on infinite helical chains of edge- and corner-sharing nickel octahedra. It represents the first example of a chiral one-dimensional compound with an extended helical TM-O-TM subnetwork synthesized as an optically pure product. Its structure was determined ab initio by real-space methods from laboratory powder diffraction data.