Crystal chemical analysis of structures of the unsaturated tetraazamacrocyclic gold(III) complexes

Abstract

The detailed comparative study is carried out for crystal structure packings of the following gold(III) complexes with unsaturated ligands: [Au(C₁₄H₂₂N₄)]Br (I), [Au(C₁₄H₂₃N₄)](ClO₄)₂ (II), [Au(C₁₄H₂₄N₄)](H₃O)(ClO₄)₄ (III). The determining role in the topological pattern of packings I–III belongs to the compositions and structures of the cations along with the ability of the ions of the complexes to act as donors and acceptors of hydrogen bonds. The 3D packings of complexes I and II containing iminate six-membered rings are determined and stabilized by a wide network of weak hydrogen bonds (C–H…π, C–H…Au, and C–H…Br(O)) and short contacts Au(N)…O (in structure II). The structure of imine complex III is characterized by one-dimensional piles formed due to hydrogen bonds O(w)–H…O and contacts Au…O of the О(2) atom of anion Сl(1)О₄^- with cations (H₃O)⁺ and [Au(C₁₄H₂₄N₄)]³⁺ (CIF files CCDC 251258 (I), 276132 (II), and 287784 (III)).