Crystal structure of bis­(μ-N-hy­droxy­picolin­amid­ato)bis­[bis­(N-hy­droxy­picolinamide)­sodium]

The title compound, [Na(2)(C(6)H(5)N(2)O(2))(2)(C(6)H(6)N(2)O(2))(4)], is a centrosymmetric coordination dimer based on the sodium(I) salt of N-hy­droxy­picolinamide. The mol­ecule has an {Na(2)O(6)(μ-O)(2)} core with two bridging carbonyl O atoms and two hydroxamate O atoms of two mono-deprotonated residues of N-hy­droxy­picolinamide, while two neutral N-hy­droxy­picolinamide mol­ecules are coordinated in a monodentate manner to each sodium ion via the carbonyl O atoms [the Na—O distances range from 2.3044 (2) to 2.3716 (2) Å]. The penta­coordinated sodium ion exhibits a distorted trigonal–pyramidal coordination polyhedron. In the crystal, the coordination dimers are linked into chains along the c axis via N—H⋯O and N—H⋯N hydrogen bonds; the chains are linked into a two-dimensional framework parallel to (100) via weak C—H⋯O and π–π stacking inter­actions.