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The tmQM Dataset - Quantum Geometries and Properties of 86k Transition Metal Complexes

preprint
submitted on 30.08.2020 and posted on 31.08.2020 by David Balcells, Bastian Bjerkem Skjelstad
We report the transition metal quantum mechanics dataset (tmQM), which contains the geometries and properties of a large transition metal-organic compound space. tmQM is comprised of 86,665 mononuclear complexes extracted from the Cambridge Structural Database, including Werner, bioinorganic and organometallic complexes based on a large variety of organic ligands and 30 transition metals (the 3d, 4d and 5d from groups 3 to 12). All complexes are closed-shell, and with a formal charge in the range {+1, 0, -1}e. The tmQM dataset provides the Cartesian coordinates of all metal complexes optimized at the DFTB(GFN2-xTB) level, and their molecular size, stoichiometry, and metal node degree. The quantum properties were computed at the DFT(TPSSh-D3BJ/def2-SVP) level, and include the electronic and dispersion energies, HOMO and LUMO orbital energies, HOMO-LUMO gap, dipole moment, and natural charge of the metal center; DFTB(GFN2-xTB) polarizabilities are also provided. Pairwise representations showed the low correlation between these properties, providing nearly continuous maps with unusual regions of the chemical space; e.g. complexes combining large polarizabilities with wide HOMO-LUMO gaps, and complexes combining low-energy HOMO orbitals with electron-rich metal centers. The
tmQM dataset can be exploited in the data-driven discovery of new metal complexes, including predictive models based on machine learning. These models may have a strong impact on the fields in which transition metal chemistry plays a key role; e.g. catalysis, organic synthesis, and materials science. tmQM is an open dataset that can be downloaded free of charge from https://github.com/bbskjelstad/tmqm

History

Email Address of Submitting Author

david.balcells@kjemi.uio.no

Institution

University of Oslo

Country

Norway

ORCID For Submitting Author

0000-0002-3389-0543

Declaration of Conflict of Interest

No conflict of interest

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