XBphos-Rh: a halogen-bond assembled supramolecular catalyst.

Area of Science:

• Organometallic chemistry
• Supramolecular chemistry

Background:

• Halogen bonding is an attractive non-covalent interaction for molecular assembly.
• Designing catalysts with specific structural motifs is crucial for efficient chemical transformations.

Purpose of the Study:

• To investigate the utility of halogen bonding in constructing catalyst backbones.
• To synthesize and characterize a novel rhodium-phosphine complex formed via halogen bonding.
• To evaluate the catalytic activity of the synthesized complex in hydroboration reactions.

Main Methods:

• Assembly of pyridyl- and iodotetrafluoroaryl-substituted phosphines with a rhodium(i) precursor.
• Formation and characterization of the halogen-bonded complex (XBphos-Rh).
• Testing the complex in the catalytic hydroboration of terminal alkynes.

Main Results:

• A halogen-bonded complex, XBphos-Rh, was successfully synthesized.
• The rhodium center templated the halogen bonding, obviating the need for fluorine substituents.
• The XBphos-Rh complex demonstrated efficacy in catalyzing the hydroboration of terminal alkynes.

Conclusions:

• Halogen bonding can be effectively employed to construct catalyst backbones.
• Rhodium-templated halogen bonding offers a versatile approach to catalyst design.
• The developed catalyst shows promise for synthetic applications in alkyne functionalization.