Hydrogen Bonded 3D Supramolecular Architectures of Two Organic Salts Assembled from 2-Aminoheterocyclic Compounds and Phosphoric Acid

摘要

Two phosphate salts (2-aminopyrimidine): (phosphoric acid): H_2 O [HL1~+ (H_2 PO_4)~?]·H_2 O (1), and (4-phenylthiazol-2-amine): (phosphoric acid) [HL2~+ ·(H_2 PO_4)~?] (2) based on 2-aminoheterocyclic compounds, 2-aminopyrimidine (L1), and 4-phenylthiazol-2-amine (L2) were prepared and structurally characterized by X-ray crystallography. Compound 1 crystallizes in the triclinic, space group P-1, with a = 6.2201(7) ?, b = 8.6139(9) ?, c = 9.4800(10) ?, α = 109.685(2)°, β = 106.3340(10)°, γ = 95.4450(10)°, V = 448.72(8) ?~3, Z = 2. For 1, the cations were linked to each other via intermolecular C-H···N hydrogen bonds to form a 1-D chain structure running along the a-axis direction. The anions and the water molecules were connected alternatively along the a-axis direction through O-H···O hydrogen bonds to form a 1-D chain also. The cationic chains and the anionic chains were alternatively connected along the c-axis direction through N-H···O and C-H···O hydrogen bonds to form a 2D corrugated sheet. Adjacent sheets were combined together through π-π interaction to form double sheet. These double sheets were further joined together by O-H···O and N-H···O hydrogen bonds to produce a 3D network structure. Compound 2 crystallizes in the Orthorhombic, space group Pbca, with a = 10.1929(10) ?, b = 8.4406(9) ?, c = 27.589(2) ?, α = 90°, β = 90°, γ = 90°, V = 2373.6(4) ?~3, Z = 8. In 2, the phosphates formed 1D chain along the b-axis through two P-O-H···O = P hydrogen bonds. The cations formed 1D zigzag chain along the b-axis direction under the CH-π interaction. The anionic chains were intercalated between two adjacent cationic chains through N-H···O, O-H···O, C-H···O, and O-S contacts. Such stacking repeated along the c-axis direction to form a 3D network structure. Graphical Abstracts Due to the weak interactions, the complex displays 3D network structure.