A novel left-handed double helicate constructed from L-tartrate bridged molybdenum(VI) and gadolinium(III) atoms

The one-dimensional double helicate, [NH4][Mo2O4Gd(H2O)6(L-C4H2O6)2]·4H2O (1), which was synthesized by the reaction of GdCl3, L-tartaric acid and ammonium molybdate in acidified water solution, is built up by two heft-handed single-helical chains, linked up further by eightcoordinated GdIII pieces in an enantiopure left-handed double helical configuration, of which each helix is formed by L-tartrate bridged sixcoordinated MoVI atoms.