(2,3-Di-2-pyridyl­pyrazine-κ2 N 2,N 3)diiodidopalladium(II)

The Pd(II) ion in the title complex, [PdI(2)(C(14)H(10)N(4))], is four-coordinated in a slightly distorted square-planar environment by the two pyridine N atoms of the chelating 2,3-di-2-pyridyl-pyrazine (dpp) ligand and two iodide anions. In the crystal, the pyridine rings are considerably inclined to the least-squares plane of the PdI(2)N(2) unit [maximum deviation = 0.090 (2) Å], making dihedral angles of 65.0 (2) and 66.6 (2)°. The pyrazine ring is perpendicular to the unit plane, with a dihedral angle of 89.9 (2)°. The complex mol-ecules are connected by C-H⋯I hydrogen bonds, forming a helical chain along the b axis.