  We introduce a new database SC1MC-2020 of artificial mono transition metal
complexes involving reference data (HF energy, orbitals, and integrals), and
one- and two-site entropies obtained from corresponding DMRG calculations. The
purpose of this database is to include all important metal - ligand
interactions of strongly correlated systems and obtain as much as possible
information about the electronic correlation structure, which could be
exploited by machine learning models to estimate these important information
almost immediately for any similar systems with high degree of transferability.
