Novel 3-D Framework Nickel(II) Complex with Azide, Nicotinic Acid, and Nicotinate(1−) as Coligands: Hydrothermal Synthesis, Structure, and Magnetic Properties

The hydrothermal reaction of Ni(NO3)2, NaN3, and nicotinic
acid (Hnic) yielded a 3-D supramolecular framework complex,
[Ni1.5(N3)(nic)2(Hnic)]n (1) with unusual magnetic properties. In 1,
Hnic and nic-1 coexist and show different coordination modes
(μ2-Hnic-N,O, μ2-nic-N,O, and μ3-nic-N,O,O bridging NiII ions), and
azide groups adopt μ-1,1 (EO) bridging mode linking NiII ions with
an unusual Ni−N−Ni angle.