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Tran P, Wang Y, Dzikovski B, Lahm ME, Xie Y, Wei P, Klepov VV, Schaefer HF, Robinson GH. A Stable Aluminum Tris(dithiolene) Triradical. J Am Chem Soc 2024; 146:16340-16347. [PMID: 38820231 PMCID: PMC11177253 DOI: 10.1021/jacs.4c05631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/21/2024] [Accepted: 05/22/2024] [Indexed: 06/02/2024]
Abstract
A stable aluminum tris(dithiolene) triradical (3) was experimentally realized through a low-temperature reaction of the sterically demanding lithium dithiolene radical (2) with aluminum iodide. Compound 3 was characterized by single-crystal X-ray diffraction, UV-vis and EPR spectroscopy, SQUID magnetometry, and theoretical computations. The quartet ground state of triradical 3 has been unambiguously confirmed by variable-temperature continuous wave EPR experiments and SQUID magnetometry. Both SQUID magnetometry and broken-symmetry DFT computations reveal a small doublet-quartet energy gap [ΔEDQ = 0.18 kcal mol-1 (SQUID); ΔEDQ = 0.14 kcal mol-1 (DFT)]. The pulsed EPR experiment (electron spin echo envelop modulation) provides further evidence for the interaction of these dithiolene-based radicals with the central aluminum nucleus of 3.
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Affiliation(s)
- Phuong
M. Tran
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Yuzhong Wang
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Boris Dzikovski
- Department
of Chemistry and Chemical Biology, and ACERT, National Biomedical
Center for Advanced Electron Spin Resonance Technology, Cornell University, Ithaca, New York 14853-1301, United States
| | - Mitchell E. Lahm
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Yaoming Xie
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Pingrong Wei
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Vladislav V. Klepov
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Henry F. Schaefer
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gregory H. Robinson
- Department
of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, United States
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2
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Ershova IV, Meshcheryakova IN, Yu. Trofimova O, Pashanova KI, Arsenyeva KV, Rumyantsev RV, Fukin GK, Piskunov AV. Structural diversity of 9,10-phenanthrenequinone molecular complexes with metal halides. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Witwicki M, Lewińska A, Ozarowski A. o-Semiquinone radical anion isolated as an amorphous porous solid. Phys Chem Chem Phys 2021; 23:17408-17419. [PMID: 34351330 DOI: 10.1039/d1cp01596f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of metal cations is a commonly applied strategy to create S > 1/2 stable molecular systems containing semiquinone radicals. Persistent mono-semiquinonato complexes of diamagnetic metal ions (S = 1/2) have been hitherto less common and mostly limited to the complexes of heavy metal ions. In this work, a mono-semiquinonato complex of aluminum, derived from 1,2-dihydroxybenzene, is obtained using a surprisingly short and uncomplicated procedure. The isolated product is an amorphous and porous solid that exhibits very good stability under ambient conditions. To characterise its molecular and electronic structure, 9.7, 34 and 406 GHz EPR spectroscopy was used in concert with computational techniques (DFT and DLPNO-CCSD). It was revealed that the radical complex is composed of two chemically equivalent aluminum cations and two catechol-like ligands with the unpaired electron uniformly distributed between the two organic molecules. The good stability and porous structure make this complex applicable in heterogeneous aerobic reactions.
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Affiliation(s)
- Maciej Witwicki
- Faculty of Chemistry, Wroclaw University, Joliot-Curie 14, 50-383 Wroclaw, Poland.
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4
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Ershova IV, Piskunov AV, Cherkasov VK. Complexes of diamagnetic cations with radical anion ligands. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4957] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Bubnov MP, Piskunov AV, Zolotukhin AA, Meshcheryakova IN, Skorodumova NA, Bogomyakov AS, Baranov EV, Fukin GK, Cherkasov VK. Homoligand Tris-o-Dioxolene Complexes. Peculiarities of the Molecular Structures and Magnetic Properties. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s107032842003001x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Pandey P, Tripathi S, Shanmugam M, Butcher R, Sunkari SS. Discrete and one dimensional extended Mn(III) Schiff base complexes with pseudohalides: Synthesis, structure and magnetic studies. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.118997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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7
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Radhika S, Saranya S, Harry NA, Anilkumar G. Recent Advances and Prospects in the Chemistry of
o
‐Benzoquinones. ChemistrySelect 2019. [DOI: 10.1002/slct.201902637] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sankaran Radhika
- School of Chemical SciencesMahatma Gandhi University, Priyadarsini Hills P.O., Kottayam Kerala 686560 India
| | - Salim Saranya
- School of Chemical SciencesMahatma Gandhi University, Priyadarsini Hills P.O., Kottayam Kerala 686560 India
| | - Nissy Ann Harry
- School of Chemical SciencesMahatma Gandhi University, Priyadarsini Hills P.O., Kottayam Kerala 686560 India
| | - Gopinathan Anilkumar
- School of Chemical SciencesMahatma Gandhi University, Priyadarsini Hills P.O., Kottayam Kerala 686560 India
- Advanced Molecular Materials Research Centre (AMMRC)Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam Kerala 686560 India
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8
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Ershova IV, Bogomyakov AS, Fukin GK, Piskunov AV. Features of Magnetic Behavior in the Row of Pentacoordinated Bis‐
o
‐Iminobenzosemiquinonato Metal (Al, Ga, In) Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801348] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP‐445 603950 Nizhny Novgorod Russia
| | - Artem S. Bogomyakov
- International Tomography Center Siberian Branch of the Russian Academy of Sciences 3a Institutskaya str. 630090 Novosibirsk Russia
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP‐445 603950 Nizhny Novgorod Russia
| | - Alexandr V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP‐445 603950 Nizhny Novgorod Russia
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