In situ syntheses, crystal structures and magnetic properties of CuIIand MnIIcoordination assemblies based on a novel heteroalicyclic dicarboxylate tecton and N-donor co-ligands

摘要: This work focuses on coordination chemistry of a heteroalicyclic dicarboxylate ligand 5,6-dihydro-1,4-dithiin-2,3-dicarboxylate (L) with transition metals in the presence N-donor co-ligands. A series five CuII and MnII complexes L building blocks different chelating/bridging co-ligands have been prepared, namely [Cu(L)(phen)]n (1), [Cu(L)(4bpy)(H2O)]n (2), {[Cu2(L)2(μ3-OH)](H2dabco)0.5(H2O)}n (3), {[Mn2(L)(phen)4](H2O)2(ClO4)2}2 (4), {[Mn2(L)(2bpy)4](2bpy)0.5(ClO4)2}2 (5) (phen = 1,10-phenanthroline, 4bpy 4,4′-bipyridine, dabco 1,4-diazabicyclo[2,2,2]octane, 2bpy 2,2′-bipyridine), which is obtained by an situhydrolysis reaction 5,6-dihydro-1,4-dithiin-2,3-dicarboxylic anhydride lithium hydroxide. Single-crystal X-ray diffraction reveals that these display variety motifs, from discrete tetranuclear species (4 5) to infinite 1-D arrays (1 3) 2-D → 3-D polycatenated architecture are regulated multiple modes L. Furthermore, introduction auxiliary N-heterocyclic ligands plays critical role extending dimensionality metallosupramolecular systems via and/or secondary interactions such as hydrogen bonds aromatic stacking. The magnetic properties thermal stability also investigated discussed detail.