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The University of Southampton
Chemistry

Research project: Levason: Coordination chemistry of metal and non-metal fluorides

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The coordination chemistry of metal and non-metal fluorides is quite different to that of the same elements with chlorides, bromides or iodides.

The coordination chemistry of metal and non-metal fluorides is quite different to that of the same elements with chlorides, bromides or iodides. This results from the extreme electronegativity of fluoride ligands which greatly alter the properties of the metal(non-metal) centres, and correspondingly affect how these interact with other ligands.1 Metal fluoride bridges are also much stronger than those containing heavier halides, and in some cases fluoride bridges are preferred to the formation of metal-ligand bonds. We have recently reported on complexes of high valent d-block fluorides, especially on their chemistry with soft donor ligands such as phosphines or thioethers- examples are the complexes of TiF42 NbF5,3 TaF54 Very hard Lewis acids such as ZrF4 and HfF4 complex only with N- or O- donor ligands.5 Complexes of P-block fluorides have also been explored including those of SnF4 and GeF4 ..6

The use of Al, Ga and In fluoride complexes with triazamacrocycles and related ligands is currently under investigation, along with their use as 18F- carriers for late stage fluorination of PET diagnostic imaging agents.7

Future projects will involve extension of these studies to other early d-block metals and to lower valent p-block fluorides.

1 Benjamin, Levason and Reid, Chem. Soc. Rev., 2013, 42, 1460.

2. Jura et. al. Dalton Trans., 2010, 39, 10264.

3. Jura et. al. Dalton Trans., 2010, 39, 883.

4. Benjamin et. al., J. Fluorine Chem., 2012, 137, 77.

5. Benjamin et. al. Dalton Trans., 2012, 41, 2548.

6. Davis et. al., Dalton Trans., 2008, 533.

7. Bhalla et. al. Chem. Sci. , 2014, 5, 381.

Related research groups

Functional Inorganic, Materials and Supramolecular Chemistry
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