文摘
Four new compounds composed of chiral complex cations and anions: Δ-[Fe(bpy)3] Λ-[Fe(bpy)3][V4O8((2R,3R)-tart)2]·12H2O (1), Δ-[Fe(bpy)3]2Λ-[Fe(bpy)3]2[V4O8((2R,3R)-tart)2][V4O8((2S,3S)-tart)2]·24H2O (2), Δ-[Ni(bpy)3]Λ-[Ni(bpy)3][V4O8((2R,3R)-tart)2]·12H2O (3) and Δ-[Ni(bpy)3]2Λ-[Ni(bpy)3]2[V4O8((2R,3R)-tart)2][V4O8((2S,3S)-tart)2]·24H2O (4) have been prepared. The compounds have been characterized by spectral methods, and their thermal decomposition was studied by simultaneous DTA, TG measurements. The final products after dynamic decomposition and additional heating were Fe2V4O13 for 1 and 2 and Ni(VO3)2 for 3 and 4. The crystal structures determined for 1, 2 and 4 have evidenced that 1 is “hemiracemic-and 2 and 4 are “fully racemic-compounds.