Ortho-Carborane-Derived Halogen-Bonded Sandwich Complexes

Area of Science:

• Supramolecular Chemistry
• Organometallic Chemistry
• Crystallography

Background:

• Multidentate halogen-bonding receptors based on C-iodinated ortho-carborane moieties were previously introduced.
• Solution studies indicated a secondary binding event for halide guests at sub-stoichiometric concentrations.

Purpose of the Study:

• To systematically evaluate the halogen-bonding capacities of these receptors in the solid-state.
• To investigate the coordination behavior of halide ions with the carborane-based receptors.

Main Methods:

• Co-crystallization of halide guests with the carborane-based receptors.
• X-ray diffraction analysis to determine solid-state structures.

Main Results:

• Obtained solid-state structures of halide-receptor complexes.
• Identified two rare examples of octahedral coordination of a halide ion by a pair of tridentate receptors.

Conclusions:

• The study confirms and expands upon the halogen-bonding capabilities of carborane-based receptors in the solid state.
• The findings highlight the potential of these receptors as catalysts and in supramolecular assembly.