Halonium Ions as Halogen Bond Donors in the Solid State [XL2]Y Complexes

Area of Science:

• Supramolecular Chemistry
• Solid-State Chemistry
• Crystallography

Background:

• Halogen bonding is a rapidly advancing field in supramolecular chemistry.
• While other non-covalent interactions are well-understood, halogen bonding's nature and applications remain largely unexplored.
• Perfluorohalocarbons are common halogen bond donors, but extreme polarization offers new possibilities.

Purpose of the Study:

• To review the solid-state structural chemistry of halonium ions.
• To discuss halonium ions as potent halogen bond donors.
• To explore novel [XL2]Y complexes in the solid state.

Main Methods:

• Literature review of solid-state structural data.
• Analysis of crystal structures containing halonium ions.
• Comparison of halonium ion halogen bonding with traditional donors.

Main Results:

• Halonium ions represent the most extremely polarized halogen atoms.
• These ions act as effective halogen bond donors in solid-state [XL2]Y complexes.
• Structural data confirms the viability of halonium ions in halogen bonding.

Conclusions:

• Halonium ions offer a new frontier in halogen bonding research.
• Their unique electronic properties enable strong halogen bond donation.
• This work expands the scope of known halogen bond donors and their applications in materials science.