We describe the graph of electronic properties as a graph G E = (V, E), where V are nodes of the graph, and E are the edges. In this case, V can represent atoms, lone pairs, and bond orbitals, where a mapping function ϕ = V → A describes the types of nodes in the graph. Edges of this graph can represent atom to atom covalent interactions, node to bond, and second-order interactions between possible combinations of lone pairs and bond orbitals.