A novel 2D framework containing M2L2 24-membered rings interconnected through secondary N–H⋯I bonds

A novel complex, Hg2I4L2 (L: 2,2′-(ethane-1,2-diylbis(oxy))dibenzenamine), containing a “dumb-bell” channel in a 2D framework has been prepared. Single crystal X-ray analysis has revealed that two metal atoms and two ligands L form a M2L2 24-membered ring with a metal–metal separation of 6.836 Å in the complex. The whole structure was stabilized by weak π–π interactions and the N–H⋯I bonds to form 2D network. The thermal decomposition of free ligand L and complex A were studied using TG/DTG/DTA techniques. The thermogram reveals that complex A undergoes two steps between 155 and 370 °C, while there is only a single endothermic step in the free ligand L.