Template or Ligand? Different Structural Behaviours of Aromatic Amines in Combination with Zinco-phosphite Networks

The solution-mediated syntheses and crystal structures of -poly[bis-(2-amino-3-hy-droxy-pyridinium) [zinc-di-μ-phospho-nato] dihydrate], {(CHNO)[Zn(HPO)]·2HO} , (I), and poly[(benzene-1,2-di-amine)(μ-phospho-nato)zinc], [Zn(HPO)(CHN)] , (II) are described. The extended structure of (I) features [010] anionic chains of vertex-sharing ZnO tetra-hedra and HPO pseudopyramids; these chains are characterized by disorder over major [occupancy 0.7962 (13)] and minor [0.2038 (13)] components, which can be superimposed on each other by a nominal translational shift. The 2-amino-3-hy-droxy-pyridinium cations and water mol-ecules of crystallization inter-act with the ZnPO chains by way of numerous O-H⋯O and N-H⋯O hydrogen bonds. The structure of (II) features a direct Zn-N bond to the neutral 1,2-di-amino-benzene species as part of ZnON tetra-hedra as well as HPO pseudopyramids. The Zn- and P-centred groupings are linked through their O-atom vertices into infinite (010) sheets and the structure is consolidated by N-H⋯O hydrogen bonds and N-H⋯π inter-actions. The crystal of (I) chosen for data collection was found to be an inversion twin in a 0.56 (2):0.44 (2) domain ratio.