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Gu J, Lee S, Eom S, Ki H, Choi EH, Lee Y, Nozawa S, Adachi SI, Kim J, Ihee H. Structural Dynamics of C 2F 4I 2 in Cyclohexane Studied via Time-Resolved X-ray Liquidography. Int J Mol Sci 2021; 22:9793. [PMID: 34575954 PMCID: PMC8469616 DOI: 10.3390/ijms22189793] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/06/2021] [Accepted: 09/08/2021] [Indexed: 11/28/2022] Open
Abstract
The halogen elimination of 1,2-diiodoethane (C2H4I2) and 1,2-diiodotetrafluoroethane (C2F4I2) serves as a model reaction for investigating the influence of fluorination on reaction dynamics and solute-solvent interactions in solution-phase reactions. While the kinetics and reaction pathways of the halogen elimination reaction of C2H4I2 were reported to vary substantially depending on the solvent, the solvent effects on the photodissociation of C2F4I2 remain to be explored, as its reaction dynamics have only been studied in methanol. Here, to investigate the solvent dependence, we conducted a time-resolved X-ray liquidography (TRXL) experiment on C2F4I2 in cyclohexane. The data revealed that (ⅰ) the solvent dependence of the photoreaction of C2F4I2 is not as strong as that observed for C2H4I2, and (ⅱ) the nongeminate recombination leading to the formation of I2 is slower in cyclohexane than in methanol. We also show that the molecular structures of the relevant species determined from the structural analysis of TRXL data provide an excellent benchmark for DFT calculations, especially for investigating the relevance of exchange-correlation functionals used for the structural optimization of haloalkanes. This study demonstrates that TRXL is a powerful technique to study solvent dependence in the solution phase.
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Affiliation(s)
- Jain Gu
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Seonggon Lee
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Seunghwan Eom
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Hosung Ki
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Eun Hyuk Choi
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Yunbeom Lee
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Shunsuke Nozawa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Ibaraki, Japan; (S.N.); (S.-i.A.)
- Department of Materials Structure Science, School of High Energy Accelerator Science, The Graduate University for Advanced Studies, 1-1 Oho, Tsukuba 305-0801, Ibaraki, Japan
| | - Shin-ichi Adachi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Ibaraki, Japan; (S.N.); (S.-i.A.)
- Department of Materials Structure Science, School of High Energy Accelerator Science, The Graduate University for Advanced Studies, 1-1 Oho, Tsukuba 305-0801, Ibaraki, Japan
| | - Jeongho Kim
- Department of Chemistry, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea;
| | - Hyotcherl Ihee
- Department of Chemistry and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (J.G.); (S.L.); (S.E.); (H.K.); (E.H.C.); (Y.L.)
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Korea
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Chen YH, Cheng YK, Lee YP. Formation and Infrared Spectrum of the Open-Form 2-Bromoethyl Radical (2-C 2H 4Br •) from Ultraviolet Irradiation of a C 2H 4/Br 2/ p-H 2 Matrix. J Phys Chem A 2021; 125:2139-2145. [PMID: 33687215 DOI: 10.1021/acs.jpca.1c00577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The addition reaction of halogens to alkenes is important in organic synthesis, but the reaction intermediate has rarely been detected. Whether the structure of the intermediate bromoethyl (C2H4Br•) radical is a bridged form or an open form is unclear. We took advantage of the diminished cage effect of solid p-H2 and employed infrared (IR) absorption to record the IR spectrum of C2H4Br• after photolysis of a C2H4/Br2/p-H2 matrix at 254 nm, followed by annealing. New spectral features at 676.9, 776.7, 1068.5, 1148.0, 3041.8, and 3126.8 cm-1 are assigned to the open-form 2-bromoethyl radical, according to their photolytic behavior and comparison with scaled harmonic vibrational wavenumbers and IR intensities calculated with the B2PLYPD3/6-311++G(2df,2p) method.
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Affiliation(s)
- Yu-Hsuan Chen
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Yueh-Kuei Cheng
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.,Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 300093, Taiwan.,Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106319, Taiwan
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Gulvi NR, Patel P, Maliekal PJ, Badani PM. Effect of substitution on dissociation kinetics of C 2H 5X, (X = F, Cl, Br and I): A theoretical study. Mol Phys 2021. [DOI: 10.1080/00268976.2020.1807635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Nitin R. Gulvi
- Department of Chemistry, University of Mumbai, Mumbai, India
| | - Priyanka Patel
- Chemistry Department, G. N. Khalsa College, Matunga, Mumbai, India
| | | | - Purav M. Badani
- Department of Chemistry, University of Mumbai, Mumbai, India
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5
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Park S, Shin J, Yoon H, Lim M. Photodissociation Dynamics of
CF
2
I
2
in
CCl
4
Solution Probed by Femtosecond Infrared Spectroscopy. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Seongchul Park
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 South Korea
| | - Juhyang Shin
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 South Korea
| | - Hojeong Yoon
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 South Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 South Korea
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Park S, Lee T, Shin J, Yoon H, Pak Y, Lim M. Conformer-Specific Photodissociation Dynamics of CF2ICF2I in Solution Probed by Time-Resolved Infrared Spectroscopy. J Phys Chem B 2020; 124:8640-8650. [DOI: 10.1021/acs.jpcb.0c06241] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seongchul Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Taegon Lee
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Juhyang Shin
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Hojeong Yoon
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Youngshang Pak
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
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Park S, Shin J, Yoon H, Pak Y, Lim M. Complete photodissociation dynamics of CF2I2in solution. Phys Chem Chem Phys 2019; 21:6859-6867. [DOI: 10.1039/c9cp00507b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoexcited CF2I2in c-C6H12undergoes various secondary reactions including complex and isomer formation, after ultrafast two- or three-body dissociations.
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Affiliation(s)
- Seongchul Park
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Korea
| | - Juhyang Shin
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Korea
| | - Hojeong Yoon
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Korea
| | - Youngshang Pak
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Korea
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