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Dau PD, Maurice R, Renault E, Gibson JK. Heptavalent Neptunium in a Gas-Phase Complex: (NpVIIO3+)(NO3–)2. Inorg Chem 2016; 55:9830-9837. [DOI: 10.1021/acs.inorgchem.6b01617] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phuong D. Dau
- Chemical Sciences
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rémi Maurice
- SUBATECH, UMR CNRS 6457, IN2P3/EMN Nantes/Université de Nantes, 4 rue Alfred
Kastler, BP 20722, 44307 Nantes Cedex 3, France
| | - Eric Renault
- CEISAM, UMR
CNRS 6230, Université de Nantes, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - John K. Gibson
- Chemical Sciences
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Varga Z, Truhlar DG. B2N2O4: Prediction of a Magnetic Ground State for a Light Main-Group Molecule. Inorg Chem 2015; 54:8552-9. [PMID: 26273729 DOI: 10.1021/acs.inorgchem.5b01223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cyclobutanetetrone, (CO)4, has a triplet ground state. Here we predict, based on electronic structure calculations, that the B2N2O4 molecule also has a triplet ground state and is therefore paramagnetic; the structure is an analogue of (CO)4 in which the carbon ring is replaced by a (BN)2 ring. Similar to (CO)4, the triplet ground-state structure of B2N2O4 is also thermodynamically unstable. Besides analysis of the molecular orbitals, we found that the partial atomic charges are good indicators for predicting magnetic ground states.
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Affiliation(s)
- Zoltan Varga
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota , Minneapolis, Minnesota 55455, United States
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Singlet–triplet competition in the low-lying energy states of C4O4−n S n (n = 1–3) molecules. Struct Chem 2015. [DOI: 10.1007/s11224-015-0633-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ess DH, Cook TC. Unrestricted prescriptions for open-shell singlet diradicals: using economical ab initio and density functional theory to calculate singlet-triplet gaps and bond dissociation curves. J Phys Chem A 2012; 116:4922-9. [PMID: 22578025 DOI: 10.1021/jp300633j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Here we present and test several computational prescriptions for calculating singlet-triplet (ST) gap energies and bond dissociation curves for open-shell singlet diradicals using economical unrestricted single reference type calculations. For ST gap energies from Slipchenko and Krylov's atom and molecule test set (C, O, Si, NH, NF, OH(+), O(2), CH(2), and NH(2)(+)) spin unrestricted Hartree-Fock and MP2 energies result in errors greater than 15 kcal/mol. However, spin-projected (SP) Hartree-Fock theory in combination with spin-component-scaled (SCS) or scaled-opposite-spin (SOS) second-order perturbation theory gives ST gap energies with a mean unsigned error (MUE) of less than 2 kcal/mol. Density functionals generally give poor results for unrestricted energies and only the ωB97X-D, the M06, and the M06-2X functionals provide reasonable accuracy after spin-projection with MUE values of 4.7, 4.3, and 3.0 kcal/mol, respectively, with the 6-311++G(2d,2p) basis set. We also present a new one parameter hybrid density functional, diradical-1 (DR-1), based on Adamo and Barone's modified PW exchange functional with the PW91 correlation functional. This DR-1 method gives a mean error (ME) of 0.0 kcal/mol and a MUE value of 1.3 kcal/mol for ST gap energies. As another test of unrestricted methods the bond dissociation curves for methane (CH(4)) and hydrofluoric acid (H-F) were calculated with the M06-2X, DR-1, and ωB97X-D density functionals. All three of these functionals give reasonable results for the methane C-H bond but result in errors greater than 50 kcal/mol for the H-F bond dissociation. Spin-projection is found to significantly degrade bond dissociation curves past ~2.2 Å. Although unrestricted Hartree-Fock theory provides a very poor description of H-F bond dissociation, unrestricted SCS-MP2 and SOS-MP2 methods give accurate results.
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Affiliation(s)
- Daniel H Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA.
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Ess DH, Johnson ER, Hu X, Yang W. Singlet−Triplet Energy Gaps for Diradicals from Fractional-Spin Density-Functional Theory. J Phys Chem A 2010; 115:76-83. [DOI: 10.1021/jp109280y] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States, School of Natural Sciences, University of California—Merced, 5200 North Lake Road, Merced, California 95343, United States, and Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Erin R. Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States, School of Natural Sciences, University of California—Merced, 5200 North Lake Road, Merced, California 95343, United States, and Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Xiangqian Hu
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States, School of Natural Sciences, University of California—Merced, 5200 North Lake Road, Merced, California 95343, United States, and Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Weitao Yang
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States, School of Natural Sciences, University of California—Merced, 5200 North Lake Road, Merced, California 95343, United States, and Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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Saito T, Kataoka Y, Nakanishi Y, Kitagawa Y, Kawakami T, Yamanaka S, Okumura M, Yamaguchi K. Theoretical studies on the structural and magnetic property of arginase active site. Supramol Chem 2010. [DOI: 10.1080/10610278.2010.506552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Toru Saito
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yusuke Kataoka
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yasuyuki Nakanishi
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yasutaka Kitagawa
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Takashi Kawakami
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Shusuke Yamanaka
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Mitsutaka Okumura
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Kizashi Yamaguchi
- a Department of Chemistry , Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
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Saito T, Nishihara S, Kataoka Y, Nakanishi Y, Kitagawa Y, Kawakami T, Yamanaka S, Okumura M, Yamaguchi K. Reinvestigation of the Reaction of Ethylene and Singlet Oxygen by the Approximate Spin Projection Method. Comparison with Multireference Coupled-Cluster Calculations. J Phys Chem A 2010; 114:7967-74. [DOI: 10.1021/jp102635s] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toru Saito
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Satomichi Nishihara
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yusuke Kataoka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yasuyuki Nakanishi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yasutaka Kitagawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shusuke Yamanaka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kizashi Yamaguchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Saito T, Kataoka Y, Nakanishi Y, Matsui T, Kitagawa Y, Kawakami T, Okumura M, Yamaguchi K. Which hybrid GGA DFT is suitable for Cu2O2 systems if the spin contamination error is removed? Chem Phys 2010. [DOI: 10.1016/j.chemphys.2009.12.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Saito T, Nishihara S, Kataoka Y, Nakanishi Y, Matsui T, Kitagawa Y, Kawakami T, Okumura M, Yamaguchi K. Transition state optimization based on approximate spin-projection (AP) method. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.10.055] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Kitagawa Y, Saito T, Nakanishi Y, Kataoka Y, Matsui T, Kawakami T, Okumura M, Yamaguchi K. Spin Contamination Error in Optimized Geometry of Singlet Carbene (1A1) by Broken-Symmetry Method. J Phys Chem A 2009; 113:15041-6. [DOI: 10.1021/jp905125g] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yasutaka Kitagawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Toru Saito
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yasuyuki Nakanishi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yusuke Kataoka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Toru Matsui
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kizashi Yamaguchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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11
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Kitagawa Y, Saito T, Nakanishi Y, Kataoka Y, Matsui T, Kawakami T, Okumura M, Yamaguchi K. Spin Contamination Error in Optimized Geometry of Singlet Carbene (1A1) by Broken-Symmetry Method. J Phys Chem A 2009. [DOI: 10.1021/jp905125g pmid: 19817370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasutaka Kitagawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Toru Saito
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yasuyuki Nakanishi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yusuke Kataoka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Toru Matsui
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Takashi Kawakami
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kizashi Yamaguchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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12
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Theoretical studies of the magnetic couplings and the chemical indices of the biomimetic models of oxyhemocyanin and oxytyrosinase. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sander O, Henß A, Näther C, Würtele C, Holthausen M, Schindler S, Tuczek F. Aromatic Hydroxylation in a Copper Bis(imine) Complex Mediated by a μ-η2:η2Peroxo Dicopper Core: A Mechanistic Scenario. Chemistry 2008; 14:9714-29. [DOI: 10.1002/chem.200800799] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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