AI Article Synopsis
- A new ligand platform with two ditopic Lewis acids has been developed to efficiently capture and activate diatomic substrates like NO and hydrazine.
- The design involves two 9-borabicyclo[3.3.1]nonane (9-BBN) units linked to a carbon structure, allowing effective coordination with metal ions such as Fe, Zn, and Ni.
- Experiments indicated that this dual-structure significantly enhances binding selectivity and activation pathways for hydrazine, creating unique ligands during reactions with metal complexes.
Article Abstract
We present a ligand platform featuring appended ditopic Lewis acids to facilitate capture/activation of diatomic substrates. We show that incorporation of two 9-borabicyclo[3.3.1]nonane (9-BBN) units on a single carbon tethered to a pyridine pyrazole scaffold maintains a set of unquenched nitrogen donors available to coordinate Fe , Zn , and Ni . Using hydride ion affinity and competition experiments, we establish an additive effect for ditopic secondary sphere boranes, compared to the monotopic analogue. These effects are exploited to achieve high selectivity for binding NO in the presence of competitive anions such as F and NO . Finally, we demonstrate hydrazine capture within the second-sphere of metal complexes, followed by unique activation pathways to generate hydrazido and diazene ligands on Zn and Fe, respectively.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10023486 | PMC |
| http://dx.doi.org/10.1002/anie.202218907 | DOI Listing |
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