{"id":4831,"date":"2025-02-21T11:25:00","date_gmt":"2025-02-21T11:25:00","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/esisna\/?p=4831"},"modified":"2025-10-08T14:54:40","modified_gmt":"2025-10-08T14:54:40","slug":"concavity-vs-convexity-what-is-the-role-of-molecular-configuration-on-the-reaction-pathway","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/esisna\/2025\/02\/21\/concavity-vs-convexity-what-is-the-role-of-molecular-configuration-on-the-reaction-pathway\/","title":{"rendered":"Concavity vs convexity: what is the role of molecular configuration on the reaction pathway?"},"content":{"rendered":"

\"\"The role of stereochemistry\u2014the spatial arrangement of atoms within molecules\u2014on the reaction pathway has been largely overlooked in on-surface synthesis despite being crucial in organic chemistry. In this work, we demonstrate how the starting diastereomeric configuration can drive the surface-induced transformation of a substituted cyclooctatetraene (COT) structure\u2014a key molecule in the study of aromaticity\u2014into a cyclopenta[c,d]azulene (CPA) structure, within a chevron-shaped graphene nanoribbon (GNR). Remarkably, the predominant product, the CPA chevron-like GNR, displays the lowest bandgap ever recorded for an all-carbon chevron-shaped GNR. This research opens up new possibilities for applying stereochemical principles in the design of innovative graphene-based nanostructures.<\/p>\n

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Diastereomeric Configuration Drives an On-Surface Specific Rearrangement into Low Bandgap Non-Benzenoid Graphene Nanoribbons<\/strong>, F. Villalobos, J. I. Mendieta-Moreno, J. Lobo-Checa, S. P. Morcillo, J. I Mart\u00ednez, J. M. G\u00f3mez-Fern\u00e1ndez, P. L. de Andres, J. A Martin-Gago, J. M. Cuerva, A. G. Campa\u00f1a, C. S\u00e1nchez-S\u00e1nchez, J. Am. Chem. Soc.<\/i><\/span> 147 (2025) 7245.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

The role of stereochemistry\u2014the spatial arrangement of atoms within molecules\u2014on the reaction pathway has been largely overlooked in on-surface synthesis despite being crucial in organic chemistry. In this work, we demonstrate how the starting diastereomeric configuration can drive the surface-induced transformation of a substituted cyclooctatetraene (COT) structure\u2014a key molecule in\u2026<\/p>\n

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