title: Bis{2-amino-2-oxo-N-[(1E)-1-(pyridin-2-yl-κN)ethyl-idene]acetohydrazidato-κ(2)N',O(1)}nickel(II).
abstract: In the title compound, [Ni(C(9)H(9)N(4)O(2))(2)], the Ni(II) ion is situated on a twofold rotation axis and is coordinated by two O and four N atoms from two tridentate {2-amino-2-oxo-N-[(1E)-1-(pyridin-2-yl-κN)ethyl-idene]acetohydrazidate ligands in a distorted octa-hedral geometry. In the crystal, N-H⋯O and N-H⋯N hydrogen bonds link the mol-ecules into columns in [001]. The porous crystal packing is further stabilized via π-π inter-actions between the pyridine rings of neighbouring mol-ecules [centroid-centroid distance = 3.746 (3) Å] with voids of 270 Å(3).
authors.forename: Cheikh Hamidou
authors.initials: CH
authors.lastname: Kane
authors.forename: Ibrahima Elhadj
authors.initials: IE
authors.lastname: Thiam
authors.forename: Farba Bouyagui
authors.initials: FB
authors.lastname: Tamboura
authors.forename: Mohamed
authors.initials: M
authors.lastname: Gaye
authors.forename: Pascal
authors.initials: P
authors.lastname: Retailleau