[N'-(1,3-Dioxoindan-2-yl-idene)-2-oxido-benzohydrazidato-κO,N,O]tripyridine-nickel(II) pyridine solvate.

In the title compound, [Ni(C(16)H(8)N(2)O(4))(C(5)H(5)N)(3)]·C(5)H(5)N, the Ni(II) atom is six-coordinated by two O atoms and one N atom from the Schiff base ligand and by three N atoms from three pyridine mol-ecules, forming a distorted octa-hedral geometry. The Ni-O(phenolate) bond [1.9750 (16) Å] is shorter than the Ni-O(carbon-yl) bond [2.