Crystal structure of dichlorido{N1-phenyl-N4-[(quinolin-2-yl-κN)methylidene]benzene-1,4-diamine-κN4}mercury(II)

Abstract

In the mononuclear title complex, [HgCl2(C22H17N3)], synthesized from the quinoline-derived Schiff baseN1-phenyl-N4-[(quinolin-2-yl)methylidene]benzene-1,4-diamine (PQMBD) and HgCl2, the coordination sphere around the Hg2+atom is distorted tetrahedral, comprising two Cl atoms [Hg—Cl = 2.3487 (14) and 2.4490 (15) Å] and two N atom donors from the PQMBD ligand,viz. the quinolyl and the imine N atom [Hg—N = 2.270 (4) and 2.346 (4) Å, respectively]. The dihedral angle between the two benzene rings attached to the amino group is 43.7 (3)°. In the crystal, N—H...Cl and C—H...Cl hydrogen bonds, as well as π–π stacking interactions between one phenyl ring and the pyridine ring of the quinoline moiety of an adjacent molecule [centroid-to-centroid separation = 3.617 (4) Å] are observed, resulting in a three-dimensional network.