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The shape complementarity between the active site of a catalyst and a substrate influences how effectively a reaction can be catalysed. Computational tools can be used to visualize the shape around the active centre of a range of catalysts and the application of such approaches to rationalize the behaviour of known catalysts — and to design new ones — is discussed.
Spins in molecules provide a simple platform with which to encode a quantum bit (qubit), the elementary unit of future quantum computers. This Perspective discusses how chemistry can contribute to designing robust spin systems based, in particular, on mononuclear lanthanoid complexes.