The mercury (II) complex, Hg (Meca₂en)I₂ (1), containing bidentate Schiff base ligand  Meca₂en = N,N′-bis[(E)-2-benzylidenepropylidene]ethane-1,2-diamine, has been synthesized and characterized by elemental analyses (CHN) and ¹H-NMR spectroscopy. The crystal structure of 1 was determined using single-crystal X-ray diffraction. Structural investigation shows that 1 crystallizes in a monoclinic system, with space group P2₁/n. The Schiff base ligand Meca₂en acts as a bidentate ligand coordinating via two N atoms to mercury (II) ion.