Aqua-(1,4,7,10-tetra-aza-cyclo-dodeca-ne)zinc(II) bis-(perchlorate)

Area of Science:

• Coordination Chemistry
• Crystal Engineering
• Inorganic Chemistry

Background:

• Zinc(II) complexes with macrocyclic ligands are of interest due to their diverse applications.
• Understanding the solid-state structure is crucial for predicting chemical behavior and designing new materials.

Purpose of the Study:

• To elucidate the crystal structure of aqua-(1,4,7,10-tetra-aza-cyclo-dodeca-ne)zinc(II) bis-(perchlorate).
• To investigate the coordination environment of the zinc(II) ion and the packing of the complex in the solid state.

Main Methods:

• Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
• The crystal structure was analyzed to identify coordination geometry, ligand conformation, and intermolecular interactions.

Main Results:

• The cationic zinc(II) complex, [Zn(C8H20N4)(H2O)](ClO4)2, adopts a distorted square-pyramidal coordination geometry with a water molecule at the apical position.
• The tetra-aza macrocyclic ligand exhibits conformational isomerism in the crystal lattice.
• Perchlorate anions display positional disorder, and intermolecular hydrogen bonding connects the complexes in the crystal.

Conclusions:

• The study provides a detailed structural characterization of a novel zinc(II) macrocyclic complex.
• The observed structural features, including coordination geometry and hydrogen bonding, offer insights into the supramolecular assembly of metal complexes.