Half-opened clamshell and one-dimensional chain structures constructed of bis(macrocyclic) dinickel(II) complexes with iodide and terephthalate anions

We report the synthesis of two new dinickel(II) complexes with iodide and bridging terephthalate (tp2−) dianionic co-ligands, namely [Ni2L]I4 · 3H2O and catena-poly[[{Ni2L(OH2)2}2(μ-endo-tp)](μ-exo-tp)](ClO4)4 · 4H2O, where L represents a bis(macrocyclic) ligand, 7,7′-(propane-1,3-diyl)bis{3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),13,15-triene}, and the elucidation of their structures by single crystal X-ray analysis.