Bis(pyridine-κN){N,N-[1,1'-(pyridine-2,6-di-yl)diethyl-idyne]benzene-sulfono-hydrazonato-κO,N,N',N'',O'}nickel(II).

In the crystal structure of the title compound, [Ni(C(21)H(19)N(5)O(4)S(2))(C(5)H(5)N)(2)], the metal center is seven-coordinate, with an approximate penta-gonal-bipyramidal configuration. The Ni atom is chelated by a dianionic penta-dentate Schiff base via the pyridine N atom, the two azomethine N atoms and the two sulfonyl O atoms. The latter coordinate to Ni at different distances, viz. 2.3337†(12) and 2.7988†(12)†à . Two apically coordinated pyridine mol-ecules complete the seven-coordin-ate geometry. The dihedral angle between the two pyridine ring planes is 68.25†(6)°.