| NBO | Natural Bond Orbitals |
| NL | Non–Lewis Orbitals |
| DFT | Density Functional Theory |
| DLPNO–CCSD(T) | domain-based local pair natural orbital coupled-cluster |
| QTAIM | Quantum Theory of Atoms in Molecules |
| NCI | Non–Covalent Interactions |
| NBO | Natural Bond Orbitals |
| NL | Non–Lewis Orbitals |
| DFT | Density Functional Theory |
| DLPNO–CCSD(T) | domain-based local pair natural orbital coupled-cluster |
| QTAIM | Quantum Theory of Atoms in Molecules |
| NCI | Non–Covalent Interactions |