We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Identifying Multinuclear Organometallic Intermediates in On‐Surface [2+2] Cycloaddition Reactions.
- Authors
Zhang, Ran; Xia, Bowen; Xu, Hu; Lin, Nian
- Abstract
We investigate the on‐surface [2+2] cycloaddition reaction of 2,3,6,7,10,11‐hexabromotriphenylene (HBTP) on Ag(111), Cu(111), Au(111), and Cu‐dosed Au(111) surfaces using STM and DFT simulation focusing on the organometallic intermediates. The fully debrominated HBTP molecules form an organo‐silver framework on Ag(111) and an organo‐copper framework on Cu(111), both incorporating multinuclear metal adatom clusters. The organo‐silver framework is converted into porous covalent networks via [2+2] cycloaddition above 240 °C. In contrast, the organo‐copper framework is very stable and does not undergo [2+2] cycloaddition even at 300 °C. On Au(111), no organo‐gold intermediate of [2+2] cycloaddition is observed. After loading Cu onto Au(111), the partially debrominated HBTP molecules bind to Cu adatom dimers to form multinuclear organo‐copper complexes at 100 °C which undergo [2+2] cycloaddition at 140 °C. This study shows that the choice of surface can direct the reaction pathway.
- Subjects
RING formation (Chemistry); METAL clusters; BROMINATION
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 46, p16637
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201909278