Carborane substituents — rather than alkyl or aryl groups — have now been used to tune ligand properties. Attaching a carborane cluster to a ligand through either a carbon or a boron atom markedly changes its coordination behaviour without altering its steric profile.
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Weller, A. The two faces of carboranes. Nature Chem 3, 577–578 (2011). https://doi.org/10.1038/nchem.1102
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DOI: https://doi.org/10.1038/nchem.1102
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