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, [Ni-1.5(N-3)(nic)(2)(Hnic)](n) (1) with unusual magnetic properties. In 1, Hnic and nic(-1) coexist and show different coordination modes (mu(2)-Hnic-N,O,mu(2)-nic-N,O, and mu(3)-nic-N,O,O bridging Ni-II ions), and azide groups adopt mu-1,1 (EO) bridging mode linking Ni-II ions with an unusual Ni-N-Ni angle.