[1,3-Bis(2-ethoxy-phen-yl)triazenido]bromidomercury(II)

Area of Science:

• Inorganic Chemistry
• Crystal Engineering
• Coordination Chemistry

Background:

• Mercury(II) complexes with triazenide ligands are of interest due to their diverse coordination geometries.
• Understanding intermolecular interactions is crucial for designing extended solid-state structures.

Purpose of the Study:

• To elucidate the crystal structure and supramolecular assembly of a novel mercury(II) bromide complex with a 1,3-bis-(2-ethoxy-phenyl)triazenide ligand.
• To investigate the role of non-classical hydrogen bonds and π-interactions in the self-assembly of mercury(II) complexes.

Main Methods:

• Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
• Analysis of intermolecular contacts, including hydrogen bonds and π-interactions, was performed.

Main Results:

• The mercury(II) center exhibits a distorted square-planar geometry, coordinated by one bromide ion and the triazenide ligand via one O and two N atoms.
• Mononuclear complexes form centrosymmetric dimers through intermolecular C-H⋯N hydrogen bonds and weak Hg-arene π-interactions.
• Dimeric units assemble into zigzag chains along the crystallographic c axis via secondary C-H⋯π edge-to-face benzene ring interactions.

Conclusions:

• The study reveals a unique supramolecular architecture driven by a combination of coordination, hydrogen bonding, and π-stacking interactions.
• The findings contribute to the understanding of crystal engineering principles in mercury(II) coordination compounds.