Effects of Anionic Geometries on Hydrogen-Bonding Networks of 1-(4-pyridyl) Piperazine

摘要: A series of new salts have been obtained by the self-assembly 1-(4-pyridyl) piperazine and inorganic ions or metal chloride in hydrochloric acid medium, i.e. (C9H15N3 2+)·(Cl−)2 (1) 2+)·(NO3 −)2 (2), 2+)·(CuCl4 2−) (3), 2+)·(CoCl4 (4), 2+)·(ZnCl4 (5), {(C9H15N3 2+)·[Mn(H2O)2Cl4 2−]}·H2O (6), (C9H14N3 +)·(Sb2Cl7 −) (7) 2+)·(PbCl4 (8). Structural analyses indicate that different anionic structure (e.g. spherical, trigonal planar, tetrahedral, octahedral, polyhedral chain) can induce formation diverse architectures, influencing crystallization ratio, protonated number final structures. Extensive intermolecular interactions utilized for frameworks, ranging from strong X–H···Y (X=O, N; Y=Cl, O) hydrogen bonds to weak C–H···M (M=O, Cl) interactions. Among them, 3D hydrogen-bonding architectures are observed 1–7 but only a 2D architecture is 8. Salt 6 crystallizes with water molecules others do not. Interestingly, anions 7 8 dinuclear 1D complex ions, respectively. supramolecular acids medium.