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Sun J, Wang Y. How Does Spin Play with the Cycloaddition to Paramagnetic Endohedral Metallofullerenes? The Curious Case of TiSc 2N@C 80. Inorg Chem 2022; 61:19183-19192. [DOI: 10.1021/acs.inorgchem.2c02784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Jing Sun
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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Wang L, Wang Y. Exploring Reactivity and Regioselectivity of Dimerization of Paramagnetic Endohedral Metallofullerenes. Inorg Chem 2020; 59:10962-10975. [DOI: 10.1021/acs.inorgchem.0c01448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lihong Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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El Bakouri O, Garcia-Borràs M, Girón RM, Filippone S, Martín N, Solà M. On the regioselectivity of the Diels-Alder cycloaddition to C 60 in high spin states. Phys Chem Chem Phys 2018; 20:11577-11585. [PMID: 29417103 PMCID: PMC5932534 DOI: 10.1039/c7cp07965f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 01/24/2018] [Indexed: 11/21/2022]
Abstract
Controlling the regioselectivity in the exohedral functionalization of fullerenes and endohedral metallofullerenes is essential to produce specific desired fullerene derivatives. In this work, using density functional theory (DFT) calculations, we show that the regioselectivity of the Diels-Alder (DA) cycloaddition of cyclopentadiene to 2S+1C60 changes from the usual [6,6] addition in the singlet ground state to the [5,6] attack in high spin states of C60. Changes in the aromaticity of the five- and six-membered rings when going from singlet to high spin C60 provide a rationale to understand this regioselectivity change. Experimentally, however, we find that the DA cycloaddition of isoindene to triplet C60 yields the usual [6,6] adduct. Further DFT calculations and computational analysis give an explanation to this unanticipated experimental result by showing the presence of an intersystem crossing close to the formed triplet biradical intermediate.
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Affiliation(s)
- Ouissam El Bakouri
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , c/Maria Aurèlia Capmany 6 , 17003 Girona , Spain .
| | - Marc Garcia-Borràs
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , c/Maria Aurèlia Capmany 6 , 17003 Girona , Spain .
- Department of Chemistry and Biochemistry , University of California , Los Angeles 607 Charles E Young Drive East , 90095 Los Angeles , CA , USA
| | - Rosa M. Girón
- Departamento de Química Orgánica , Facultad de Química , Universidad Complutense , Avda. Complutense s/n , E-28040 Madrid , Spain .
| | - Salvatore Filippone
- Departamento de Química Orgánica , Facultad de Química , Universidad Complutense , Avda. Complutense s/n , E-28040 Madrid , Spain .
| | - Nazario Martín
- Departamento de Química Orgánica , Facultad de Química , Universidad Complutense , Avda. Complutense s/n , E-28040 Madrid , Spain .
- IMDEA–Nanociencia , C/Faraday, 9 , Campus de Cantoblanco , E-28049 Madrid , Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , c/Maria Aurèlia Capmany 6 , 17003 Girona , Spain .
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