Dichlorido(2,4,6-tri-2-pyridyl-1,3,5-triazine)manganese(II)

In the title complex, [MnCl2(C18H12N6)], the MnII ion is five-coordinated in an approximately square-pyramidal geometry defined by three N atoms of the tridentate 2,4,6-tri-2-pyridyl-1,3,5-triazine ligand and two Cl atoms. In the crystal, the molecules are stacked in columns along the c axis and display intermolecular π–π interactions between the six-membered rings, the shortest centroid–centroid distance being 3.553 (3)Å. Intermolecular C—H⋯Cl contacts are also noted.

In the title complex, [MnCl 2 (C 18 H 12 N 6 )], the Mn II ion is fivecoordinated in an approximately square-pyramidal geometry defined by three N atoms of the tridentate 2,4,6-tri-2-pyridyl-1,3,5-triazine ligand and two Cl atoms. In the crystal, the molecules are stacked in columns along the c axis and display intermolecularinteractions between the six-membered rings, the shortest centroid-centroid distance being 3.553 (3)Å . Intermolecular C-HÁ Á ÁCl contacts are also noted.

Experimental
To a solution of 2,4,6-tri-2-pyridyl-1,3,5-triazine (0.25 g, 0.80 mmol) in EtOH (30 ml) was added MnCl 2 .4H 2 O (0.16 g, 0.81 mmol) and stirred for 2 h at room temperature. The formed precipitate was separated by filtration and washed with EtOH and dried under vacuum, to give a yellow powder (0.14 g). Crystals suitable for X-ray analysis were obtained by slow evaporation from a CH 3 CN solution.

Refinement
H atoms were positioned geometrically and allowed to ride on their respective parent atoms [C-H = 0.95 Å and U iso (H) = 1.2U eq (C)]. Fig. 1. The structure of the title complex, with displacement ellipsoids drawn at the 50% probability level for non-H atoms.

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
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.