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

Abstract

In the crystal, the coordination dimers are linked via N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds and π–π stacking inter­actions into a two-dimensional framework parallel to (100).

Crystal structure of poly[(μ3-4-amino-1,2,5-oxadiazole-3-hydroxamato)thallium(I)]

“…The substituent amino-and hydroxamate groups in the 4-and 3-positions, respectively, of the 1,2,5-oxadiazole ring are nearly coplanar with the oxadiazole ring, with a deviation of 0.071 Å for nitrogen atom N4 of the amino group and a dihedral angle between the mean plane of the heterocycle and the hydroxamate group C1/O2/N1/O1 of 8.4 (4) . The C3-N4 [1.360 (13) Å ] and N1-O1 [1.412 (9) Å ] bond lengths are typical for a non-coordinating amino group (Fonari et al, 2003;Viterbo & Serafino, 1978) and for a deprotonated hydroxamate group (Golenya et al, 2012;Safyanova et al, 2017), respectively. On the other hand, the C1-N1 [1.314 12 (Larsen, 1988), accompanied by a delocalization of the electrons over the N1-C1-O2 backbone and a disorder of the corresponding hydrogen atom that could not be localized from difference-Fourier maps.…”