AI Article Synopsis
- The synthesis of fluorine, long thought impossible, was finally achieved in 1986 but remains under-studied.
- There were doubts about the stability of MnF, as it was thought to decompose spontaneously, but new experiments and electronic calculations have clarified its behavior.
- The process of fluorine elimination involves adding excess SbF to trigger a mechanism that uses tridentate anions to facilitate the release of fluorine.
Article Abstract
The purely chemical synthesis of fluorine is a spectacular reaction which for more than a century had been believed to be impossible. In 1986, it was finally experimentally achieved, but since then this important reaction has not been further studied and its detailed mechanism had been a mystery. The known thermal stability of MnF casts serious doubts on the originally proposed hypothesis that MnF is thermodynamically unstable and decomposes spontaneously to a lower manganese fluoride and F . This apparent discrepancy has now been resolved experimentally and by electronic structure calculations. It is shown that the reductive elimination of F requires a large excess of SbF and occurs in the last reaction step when in the intermediate [SbF ][MnF ][Sb F ] the addition of one more SbF molecule to the [SbF ] anion generates a second tridentate [Sb F ] anion. The two tridentate [Sb F ] anions then provide six fluorine bridges to the Mn atom thereby facilitating the reductive elimination of the two fluorine ligands as F .
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| http://dx.doi.org/10.1002/anie.202307218 | DOI Listing |
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