Dr Mark Crimmin
Winner: 2020 Chemistry of Transition Metals Award
Imperial College London
For the discovery of an unprecedented transition metal complex with a hexagonal planar geometry.
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Molecules based on transition metals are widely used in the physical and biological sciences. They play essential roles in the manufacture of pharmaceuticals, agrochemicals and polymers. They are also vital for the function of some proteins inside our bodies.
The properties of these molecules are related to the shape that atoms adopt when placed around the transition metal. Studies over the last 100 years have revealed a number of common shapes (or geometries) for transition metals, including octahedral, tetrahedral, square planar, linear, and others.
Dr Crimmin’s research team have discovered a molecule with six atoms each connected to a central transition metal but only weakly connected to each other, forming a hexagonal planar geometry. This geometry is extremely uncommon for transition metals and importantly the work was able to establish the underlying theory behind the unusual shape and associated chemical bonding. The discovery is a fundamental advance and in the longer term it may give new design principles for how to use molecules based on transition metals to improve quality of life through chemistry.
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