Abstract
Cycloaddition is one of the best-studied types of reactions in the organic chemistry of fullerenes, engendering [6,6]-closed adducts in the vast majority of cases. Notwithstanding that a formation of open fulleroid structures is undoubtedly of theoretical interest, no one has demonstrated the conformation of [5,6]-open fulleroid via the direct cycloadditions. Here, we establish that cycloaddition between C60 and benzyne in situ generated from 2-amino-4,5-dibutoxybenzoic acid affords a new type of elusive [5,6]-open structure that is characterized on the basis of NMR, UV-vis spectroscopy, and cyclic voltammetry. Additionally, from density functional theory (DFT) calculations for possible [5,6]-open and [6,6]-closed adducts induced of benzyne-C60 reaction, as expected, features such as the charge distributions, binding characteristics, and frontier molecular orbital levels, are affected by the different binding modes in C60 cage.
Original language | English |
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Pages (from-to) | 7354-7359 |
Number of pages | 6 |
Journal | Tetrahedron |
Volume | 69 |
Issue number | 35 |
DOIs | |
State | Published - 2 Sep 2013 |
Keywords
- Benzyne
- Buckminsterfullerene
- Cycloaddition
- [5,6]-Open adduct
- [6,6]-Closed adduct