Crystal and Molecular Structures of Two Salts Based on Polyamine Deribatives

Abstract

The crystal structures of salts (C₁₈H₂₂N₃)(NO₃) (I) and (C₈H₂₄N₄)[ZnCl₄]Cl₂(II), based on protonated polyamines (diethylenetriamine and N,N′-bis(2-aminoethyl)piperazine) are studied by single crystal X-ray diffraction. Salt I exhibits a wave-like 1D chain formed by N-H⋯O hydrogen bonds from monoprotonated (C₁₈H₂₂N₃)⁺ cations and NO₃⁻ anions. In salt II, multi-protonated N,N′-bis(2-aminoethyl)piperazinium ions are connected into two types of infinite subloop chains through N-H⋯Cl and C-H⋯Cl halogen bonding contacts from (C₈H₂₄N₄)⁴⁺ cations and [ZnCl₄]²⁻ and Cl⁻ anions. The analysis of the Hirshfeld surfaces shows the intermolecular interactions involved in the crystal structures. The corresponding quantitative information is presented by fingerprint plots.