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Title: | Revisiting indeno[1,2-b]fluorene by steric promoted synthesis while isolating the second stable 4nπ indeno[2,1-a]fluorene |
Authors: | Sharma, H. Bhardwaj, N. Das, S. |
Issue Date: | 15-Dec-2022 |
Abstract: | Described herein are the steric promoted synthesis and characterization of symmetric, unsymmetric, and benzo-extended indeno[1,2-b]fluorenes 1–5, including the isolation of stable 4nπ indeno[2,1-a]fluorene 6. Single-crystal XRD analyses of 5 and 6 gave the unambiguous confirmation of unsymmetrical [1,2-b]IF and [2,1-a]IF motifs, respectively. The different ground state antiaromaticity of 5 and 6 was explained by Gimarc's approach for topological charge destabilization. The electronic properties of unsymmetrical IFs 2–5 mostly lie midway between 1 and its other known symmetrical counterparts. |
URI: | http://localhost:8080/xmlui/handle/123456789/4307 |
Appears in Collections: | Year-2022 |
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