A novel left-handed double helicate constructed from l-tartrate bridged molybdenum(vi) and gadolinium(iii) atomsElectronic supplementary information (ESI) available: crystallographic data, TGA, powder X-ray patterns, ORTEP structure and molar susceptibility plot for compound 1. See http://www.rsc.org/suppdata/cc/b3/b301542d/

Abstract

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 eight-coordinated Gd^III pieces in an enantiopure left-handed double helical configuration, of which each helix is formed by L-tartrate bridged six-coordinated Mo^VI atoms.