Dichloridobis(phenanthridine-κN)zinc(II)

In the molecule of the title compound, [ZnCl2(C13H9N)2], the ZnII atom is four-coordinated in a distorted tetrahedral configuration by two N atoms from two phenanthridine ligands and by two terminal Cl atoms. The dihedral angle between the planes of the phenanthridine ring systems is 69.92 (3)°. An intramolecular C—H⋯Cl interaction results in the formation of a planar five-membered ring, which is oriented at a dihedral angle of 8.32 (3)° with respect to the adjacent phenanthridine ring system. In the crystal structure, π–π contacts between the phenanthridine systems [centroid–centroid distances = 3.839 (2), 3.617 (1) and 3.682 (1) Å] may stabilize the structure. Two weak C—H⋯π interactions are also found.

In the molecule of the title compound, [ZnCl 2 (C 13 H 9 N) 2 ], the Zn II atom is four-coordinated in a distorted tetrahedral configuration by two N atoms from two phenanthridine ligands and by two terminal Cl atoms. The dihedral angle between the planes of the phenanthridine ring systems is 69.92 (3) . An intramolecular C-HÁ Á ÁCl interaction results in the formation of a planar five-membered ring, which is oriented at a dihedral angle of 8.32 (3) with respect to the adjacent phenanthridine ring system. In the crystal structure, contacts between the phenanthridine systems [centroidcentroid distances = 3.839 (2), 3.617 (1) and 3.682 (1) Å ] may stabilize the structure. Two weak C-HÁ Á Á interactions are also found.
In the molecule of the title compound (Fig 1), Zn II atom is four-coordinated in a distorted tetrahedral configuration by two N atoms from two phenanthridine and two terminal Cl atoms (Table 1). The bond lengths (Allen et al., 1987) and angles are within normal ranges. Phenanthridine ring systems A (N1/C1-C13) and B (N2/C14-C26) are, of course, planar and the dihedral angle between them is A/B = 69.92 (3)°. Intramolecular C-H···Cl interaction (Table 2) results in the formation of a planar five-membered ring C (Zn1/Cl1/N1/C1/H1), which is oriented with respect to the adjacent phenanthridine ring system A at a dihedral angle of 8.32 (3)°.

Experimental
For the preparation of the title compound, (I), a solution of phenanthridine (0.30 g, 1.66 mmol) in methanol (15 ml) was added to a solution of ZnCl 2 (0.11 g, 0.83 mmol) in acetonitrile (30 ml) and the resulting colorless solution was stirred for 30 min at 313 K, and then it was left to evaporate slowly at room temperature. After one week, colorless prismatic crystals of the title compound were isolated (yield; 0.31 g, 75.5%).
supplementary materials sup-2 Refinement H atoms were positioned geometrically, with C-H = 0.93 Å for aromatic H and constrained to ride on their parent atoms, with U iso (H) = 1.2U eq (C). Fig. 1. The molecular structure of the title molecule, with the atom-numbering scheme. Displacement ellipsoids are drawn at the 40% probability level.

Dichloridobis(phenanthridine-κN)zinc(II)
Crystal data [ZnCl 2 (C 13  Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating Rfactors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.