3.1 QTAIM topologies and intermolecular geometries
The QTAIM molecular graphs, showing the possibility of various bonding interactions between atoms in the complex anions examined are given in Fig. 1. Evidence of these interactions come from the presence of well-defined bond paths and (3,–1) bcps between the bonded atomic basins in each binary complex. Such topological signatures are expected when the constituent atoms in the monomers are engaged in the formation of either covalent or noncovalent interactions. The results are consistent with the IUPAC recommendation for identifying the presence of chalcogen bonding.77