Chlorido[1-(2-ethoxyphenyl)3-(4-nitrophenyl)triazenido]mercury(II)

In the title compound, [Hg(C(14)H(13)N(4)O(3))Cl], the HgII atom is four-coordinated by one O atom and two N atoms from a tridentate 1-(2-ethoxyphenyl)-3-(4-nitrophenyl)triazenide ligand and one terminal chloride ion in a distorted square-planar geometry. In the crystal structure, the mononuclear complexes are linked into pairs through C-H...O and C-H...Cl hydrogen bonds as well as pi-pi and C-H...pi stacking interactions. In addition, weak Hg-mu 6-arene pi-interactions [mean distance of 3.667 (2) A] are present between these dimers. The pi-pi stacking interactions are between aromatic rings with a centroid-centroid distance of 3.884 (2) A. Moreover, edge-to-face interactions are present between ethoxy CH groups and aromatic rings with H...pi distances of 2.81 A.