Fig. 6
From: SMILES all around: structure to SMILES conversion for transition metal complexes
Examples of fixed CSD SMILES compared to Hückel SMILES where both representations are valid. For QAPWIP and HUVCUW, the SMILES are resonance forms of each other. The two solutions for TETCOK differ in their ligand charge (and hence oxidation state of Iridium). However, one solution is not clearly superior to the other