On the fused-to-single ring transition in 10π structures. Insights from naphthalene to [10]annulene series

- The transition between a fused-ring structure toward its single-ring counterpart is studied.
- The change occurs at certain structure instead of a gradual transition.
- The fused counterparts can be treated as a modification in the aromatic path of a single ring aromatic motif.
- Useful approach to evaluate the formation of defects or larger-rings in graphene motifs.