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Kikukawa Y, Seto K, Watanabe D, Kitajima H, Katayama M, Yamashita S, Inada Y, Hayashi Y. Induced Fitting and Polarization of a Bromine Molecule in an Electrophilic Inorganic Molecular Cavity and Its Bromination Reactivity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007406] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yuji Kikukawa
- Department of Chemistry Graduate School of Natural Science and Technology Kanazawa University, Kakuma, Kanazawa 920-1192 Ishikawa Japan
- JST PRESTO 4-1-8 Honcho, Kawaguchi 332-0012 Saitama Japan
| | - Kensuke Seto
- Department of Chemistry Graduate School of Natural Science and Technology Kanazawa University, Kakuma, Kanazawa 920-1192 Ishikawa Japan
| | - Daiki Watanabe
- Department of Chemistry Graduate School of Natural Science and Technology Kanazawa University, Kakuma, Kanazawa 920-1192 Ishikawa Japan
| | - Hiromasa Kitajima
- Department of Chemistry Graduate School of Natural Science and Technology Kanazawa University, Kakuma, Kanazawa 920-1192 Ishikawa Japan
| | - Misaki Katayama
- Department of Applied Chemistry Graduate School of Life Sciences Ritsumeikan University 1-1-1 Noji-Higashi, Kusatsu 525-8577 Shiga Japan
| | - Shohei Yamashita
- Photon Factory Institute of Materials Structure Science High Energy Accelerator Research Organization 1-1 Oho, Tsukuba 305-0801 Ibaraki Japan
| | - Yasuhiro Inada
- Department of Applied Chemistry Graduate School of Life Sciences Ritsumeikan University 1-1-1 Noji-Higashi, Kusatsu 525-8577 Shiga Japan
| | - Yoshihito Hayashi
- Department of Chemistry Graduate School of Natural Science and Technology Kanazawa University, Kakuma, Kanazawa 920-1192 Ishikawa Japan
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Kikukawa Y, Seto K, Watanabe D, Kitajima H, Katayama M, Yamashita S, Inada Y, Hayashi Y. Induced Fitting and Polarization of a Bromine Molecule in an Electrophilic Inorganic Molecular Cavity and Its Bromination Reactivity. Angew Chem Int Ed Engl 2020; 59:14399-14403. [PMID: 32511879 DOI: 10.1002/anie.202007406] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Indexed: 02/05/2023]
Abstract
Dodecavanadate, [V12 O32 ]4- (V12), possesses a 4.4 Å cavity entrance, and the cavity shows unique electrophilicity. Owing to the high polarizability, Br2 was inserted into V12, inducing the inversion of one of the VO5 square pyramids to form [V12 O32 (Br2 )]4- (V12(Br2)). The inserted Br2 molecule was polarized and showed a peak at 185 cm-1 in the IR spectrum. The reaction of V12(Br2) and toluene yielded bromination of toluene at the ring, showing the electrophilicity of the inserted Br2 molecule. Compound V12(Br2) also reacted with propane, n-butane, and n-pentane to give brominated alkanes. Bromination with V12(Br2) showed high selectivity for 3-bromopentane (64 %) among the monobromopentane products and preferred threo isomer among 2-,3-dibromobutane and 2,3-dibromopenane. The unique inorganic cavity traps Br2 leading the polarization of the diatomic molecule. Owing to its new reaction field, the trapped Br2 shows selective functionalization of alkanes.
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Affiliation(s)
- Yuji Kikukawa
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Ishikawa, Japan.,JST, PRESTO, 4-1-8 Honcho, Kawaguchi, 332-0012, Saitama, Japan
| | - Kensuke Seto
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Ishikawa, Japan
| | - Daiki Watanabe
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Ishikawa, Japan
| | - Hiromasa Kitajima
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Ishikawa, Japan
| | - Misaki Katayama
- Department of Applied Chemistry, Graduate School of Life Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, 525-8577, Shiga, Japan
| | - Shohei Yamashita
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, 305-0801, Ibaraki, Japan
| | - Yasuhiro Inada
- Department of Applied Chemistry, Graduate School of Life Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, 525-8577, Shiga, Japan
| | - Yoshihito Hayashi
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Ishikawa, Japan
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