Hydrogen Bond-Assisted Fluoride Binding by a Stiborane

To augment the fluoride binding ability of Lewis acidic stiboranes, we have synthesized and characterized a Sb-V derivative (PhSbF2((o-(NH(2,6-C6H3F2)C6H4)(2), 3) featuring diarylamine groups installed in proximity to the antimony center and poised to engage Sb-bound fluoride anions in hydrogen bonding interactions. A competition experiment between 3 and Ph3SbF2 (4) along with calculations show that the fluoride ion affinity of 3 is superior to that of 4.

Automated summary

To enhance the fluoride binding ability of Lewis acidic stiboranes, a Sb-V derivative has been synthesized and characterized. The derivative features diarylamine groups positioned near the antimony center, allowing for hydrogen bonding interactions with Sb-bound fluoride anions. Experimental and computational results demonstrate that the fluoride ion affinity of this derivative is superior to other compounds.