Synthesis, crystal structure and Hirshfeld surface analysis of bis­{2-[(pyridin-2-yl)amino]­pyridinium} tetra­cyano­nickelate(II)

摘要: In the title mol-ecular salt, (C10H10N3)2[Ni(CN)4], dihedral angle between pyridine rings in cation is 1.92 (13)° and complete anion generated by a crystallographic centre of symmetry. An intra-molecular N-H⋯N hydrogen bond occurs cation, which closes an S(6) ring. crystal, components are linked weak C-H⋯N bonds, generate chains propagating [101] direction. Weak aromatic π-π stacking inter-actions also observed. A Hirshfeld surface analysis two-dimensional fingerprint plots indicate that most important contact types crystal packing N⋯H/H⋯N, C⋯H/H⋯C H⋯H with contributions 37.2, 28.3 21.9%, respectively.