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Bozkaya U, Ünal A, Alagöz Y. Energy and analytic gradients for the orbital-optimized coupled-cluster doubles method with the density-fitting approximation: An efficient implementation. J Chem Phys 2020; 153:244115. [PMID: 33380091 DOI: 10.1063/5.0035811] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Efficient implementations of the orbital-optimized coupled-cluster doubles (or simply "optimized CCD," OCCD, for short) method and its analytic energy gradients with the density-fitting (DF) approach, denoted by DF-OCCD, are presented. In addition to the DF approach, the Cholesky-decomposed variant (CD-OCCD) is also implemented for energy computations. The computational cost of the DF-OCCD method (available in a plugin version of the DFOCC module of PSI4) is compared with that of the conventional OCCD (from the Q-CHEM package). The OCCD computations were performed with the Q-CHEM package in which OCCD are denoted by OD. In the conventional OCCD method, one needs to perform four-index integral transformations at each of the CCD iterations, which limits its applications to large chemical systems. Our results demonstrate that DF-OCCD provides dramatically lower computational costs compared to OCCD, and there are almost eightfold reductions in the computational time for the C6H14 molecule with the cc-pVTZ basis set. For open-shell geometries, interaction energies, and hydrogen transfer reactions, DF-OCCD provides significant improvements upon DF-CCD. Furthermore, the performance of the DF-OCCD method is substantially better for harmonic vibrational frequencies in the case of symmetry-breaking problems. Moreover, several factors make DF-OCCD more attractive compared to CCSD: (1) for DF-OCCD, there is no need for orbital relaxation contributions in analytic gradient computations; (2) active spaces can readily be incorporated into DF-OCCD; (3) DF-OCCD provides accurate vibrational frequencies when symmetry-breaking problems are observed; (4) in its response function, DF-OCCD avoids artificial poles; hence, excited-state molecular properties can be computed via linear response theory; and (5) symmetric and asymmetric triples corrections based on DF-OCCD [DF-OCCD(T)] have a significantly better performance in near degeneracy regions.
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Affiliation(s)
- Uğur Bozkaya
- Department of Chemistry, Hacettepe University, Ankara 06800, Turkey
| | - Aslı Ünal
- Department of Chemistry, Hacettepe University, Ankara 06800, Turkey
| | - Yavuz Alagöz
- Department of Chemistry, Hacettepe University, Ankara 06800, Turkey
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Bozkaya U. Orbital-optimized linearized coupled-cluster doubles with density-fitting and Cholesky decomposition approximations: an efficient implementation. Phys Chem Chem Phys 2016; 18:11362-73. [DOI: 10.1039/c6cp00164e] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient implementation of the orbital-optimized linearized coupled-cluster double method with the density-fitting (DF-OLCCD) and Cholesky decomposition (CD-OLCCD) approximations is presented.
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Affiliation(s)
- Uğur Bozkaya
- Department of Chemistry
- Hacettepe University
- Ankara 06800
- Turkey
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Khanal GP, Parajuli R, Arunan E, Yamabe S, Hiraoka K, Torikai E. Study of structures, energies and vibrational frequencies of (O2)n+ (n=2–5) clusters by GGA and meta-GGA density functional methods. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2014.12.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Rouillé G, Jäger C, Krasnokutski SA, Krebsz M, Henning T. Cold condensation of dust in the ISM. Faraday Discuss 2014; 168:449-60. [PMID: 25302393 DOI: 10.1039/c4fd00010b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The condensation of complex silicates with pyroxene and olivine composition under conditions prevailing in molecular clouds has been experimentally studied. For this purpose, molecular species comprising refractory elements were forced to accrete on cold substrates representing the cold surfaces of surviving dust grains in the interstellar medium. The efficient formation of amorphous and homogeneous magnesium iron silicates at temperatures of about 12 K has been monitored by IR spectroscopy. The gaseous precursors of such condensation processes in the interstellar medium are formed by erosion of dust grains in supernova shock waves. In the laboratory, we have evaporated glassy silicate dust analogs and embedded the released species in neon ice matrices that have been studied spectroscopically to identify the molecular precursors of the condensing solid silicates. A sound coincidence between the 10 microm band of the interstellar silicates and the 10 microm band of the low-temperature siliceous condensates can be noted.
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Jacox ME, Thompson WE. Absorptions between 3000 and 5500 cm–1 of Cyclic O4+ and O4– Trapped in Solid Neon. J Phys Chem A 2013; 117:13443-9. [DOI: 10.1021/jp4069174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marilyn E. Jacox
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland
20899-8441, United States
| | - Warren E. Thompson
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland
20899-8441, United States
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Jacox ME, Thompson WE. Infrared Spectra of Products of the Reaction of H Atoms with O2 Trapped in Solid Neon: HO2, HO2+, HOHOH–, and H2O(HO). J Phys Chem A 2012; 117:9380-90. [DOI: 10.1021/jp310849s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marilyn E. Jacox
- Sensor
Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland
20899-8441, United States
| | - Warren E. Thompson
- Sensor
Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland
20899-8441, United States
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Thompson WE, Lugez CL, Jacox ME. The infrared spectrum of HOOH+ trapped in solid neon. J Chem Phys 2012; 137:144305. [DOI: 10.1063/1.4757389] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Schlöder T, Riedel S. Investigation of heterodimeric and homodimeric radical cations of the series: [F2O2]+, [F2Cl2]+, [Cl2O2]+, [F4]+, and [Cl4]+. RSC Adv 2012. [DOI: 10.1039/c1ra00804h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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9
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Bozkaya U. Orbital-optimized third-order Møller-Plesset perturbation theory and its spin-component and spin-opposite scaled variants: Application to symmetry breaking problems. J Chem Phys 2011; 135:224103. [DOI: 10.1063/1.3665134] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Bozkaya U, Turney JM, Yamaguchi Y, Schaefer HF, Sherrill CD. Quadratically convergent algorithm for orbital optimization in the orbital-optimized coupled-cluster doubles method and in orbital-optimized second-order Møller-Plesset perturbation theory. J Chem Phys 2011; 135:104103. [DOI: 10.1063/1.3631129] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
This article tells of a lifelong fascination with light, a messenger bearing information from realms ranging from the galactic to the submicroscopic. Personal interactions have shaped and informed this life journey. Accounts of some of the most important of these are related. Infrared and electronic spectra have been obtained, often for the first time, for many small free radicals and molecular ions-short-lived reaction intermediates in most chemical processes. The infrared spectrum of a molecule tells how its atoms vibrate with respect to one another and is as characteristic of the molecule as a fingerprint is of a person. Analysis of this spectrum provides sometimes surprising information about the structure and chemical bonding of the molecule in its lowest-energy electronic state. The electronic spectrum provides information on the molecule in more highly excited electronic states, in which its structure or reaction pattern may change or it may decompose.
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Affiliation(s)
- Marilyn E Jacox
- Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8441, USA.
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Wang X, Andrews L. Infrared Spectroscopic Observation of the Group 13 Metal Hydroxides, M(OH)1,2,3 (M =Al, Ga, In, and Tl) and HAl(OH)2. J Phys Chem A 2007; 111:1860-8. [PMID: 17388275 DOI: 10.1021/jp066390e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Reactions of laser-ablated Al, Ga, In, and Tl atoms with H2O2 and with H2 + O2 mixtures diluted in argon give new absorptions in the O-H and M-O stretching and O-H bending regions, which are assigned to the metal mono-, di-, and trihydroxide molecules. Isotopic substitutions (D2O2, 18O2, 16,18O2, HD, and D2) confirm the assignments, and DFT calculations reproduce the experimental results. Infrared spectra for the Al(OH)(OD) molecule verify the calculated C2v structure. The trihydroxide molecules increase on annealing from the spontaneous reaction with a second H2O2 molecule. Aluminum atom reactions with the H2 + O2 mixtures favor the HAl(OH)2 product, suggesting that AlH3 generated by UV irradiation combines with O2 to form HAl(OH)2.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, USA
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Wang X, Andrews L. Infrared Spectra of M(OH)1,2,3 (M = Mn, Fe, Co, Ni) Molecules in Solid Argon and the Character of First Row Transition Metal Hydroxide Bonding. J Phys Chem A 2006; 110:10035-45. [PMID: 16913677 DOI: 10.1021/jp0624698] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reactions of laser-ablated Mn, Fe, Co, and Ni atoms with H(2)O(2) and with H(2) + O(2) mixtures in excess argon give new absorptions in the O-H and M-O stretching regions, which are assigned to metal dihydroxide and trihydroxide molecules, M(OH)(2) and M(OH)(3). Isotopic substitutions (D(2)O(2), (18)O(2), (16,18)O(2), D(2)) confirmed the assignments and DFT calculations reproduced the experimental results. The O-H stretching frequencies decreased in the dihydroxides from Sc to Zn. Mulliken and natural charge distributions indicate significant electron transfer from metal d orbitals to OH ligands that decreases from Sc to Zn, suggesting that the early transition metal hydroxides are more ionic and that the later transition metal hydroxides are more covalent.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, USA
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Wang X, Andrews L. Contrasting Products in the Reactions of Cr, Mo, and W Atoms with H2O2: Argon Matrix Infrared Spectra and Theoretical Calculations. J Phys Chem A 2006; 110:10409-18. [PMID: 16942046 DOI: 10.1021/jp063024m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Products in the reactions of H2O2 and H2, O2 mixtures have been observed by matrix infrared absorptions and identified through comparisons with vibrational frequencies calculated for these molecules. The chromium reactions are dominated by lower oxidation state products, whereas molybdenum and tungsten chemistry favors higher oxidation state products. For example chromium dihydroxide, Cr(OH)2, molybdenum hydride oxide, H2MoO2, and tungsten hydride oxide, H2WO2, were observed in laser-ablated metal atom reactions with H2O2, and calculations show that these are the most stable molecules for this stoichiometry. Chromium monohydroxide, CrOH, was identified through O-H and Cr-O stretching modes, while HWO was observed by W-H and W=O stretching modes. The metal oxyhydroxides, HMO(OH), were observed for all metals. However, reactions with two H2O2 molecules give OCr(OH)2, MoO2(OH)2, and WO2(OH)2. The relative stabilities of different structures for Cr, Mo, and W are due to different participations of occupied d orbitals. The reactivity of the cold metal atoms with H2O2 on annealing the solid argon matrix increases on going down the group.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, P O Box 400319, Charlottesville, Virginia 22904-4319, USA
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Wang X, Andrews L. Infrared Spectra of M(OH)1,2,4 (M = Pb, Sn) in Solid Argon. J Phys Chem A 2005; 109:9013-20. [PMID: 16332006 DOI: 10.1021/jp053420p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Infrared absorptions for the matrix-isolated lead and tin hydroxides M(OH), M(OH)2 and M(OH)4 (M = Pb, Sn) were observed in laser-ablated metal atom reactions with H2O2 during condensation in excess argon. The major M(OH)2 product was also observed with H2 and O2 mixtures, which allowed the substitution of 18O2. The band assignments were confirmed by appropriate D2O2, D2, 16O18O, and 18O2 isotopic shifts. MP2 and B3LYP calculations were performed to obtain molecular structures and to reproduce the infrared spectra. The minimum energy structure found for M(OH)2 has C(s) symmetry and a weak intramolecular hydrogen bond. In experiments with Sn, HD, and O2, the internal D bond is favored over the H bond for Sn(OH)(OD). The Pb(OH)4 and Sn(OH)4 molecules are calculated to have S4 symmetry and substantial covalent character.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Wang X, Andrews L. Zinc and Cadmium Dihydroxide Molecules: Matrix Infrared Spectra and Theoretical Calculations. J Phys Chem A 2005; 109:3849-57. [PMID: 16833701 DOI: 10.1021/jp050362z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Laser-ablated zinc and cadmium atoms were mixed uniformly with H2 and O2 in excess argon or neon and with O2 in pure hydrogen or deuterium during deposition at 8 or 4 K. UV irradiation excites metal atoms to insert into O2 producing OMO molecules (M = Zn, Cd), which react further with H2 to give the metal hydroxides M(OH)2 and HMOH. The M(OH)2 molecules were identified through O-H and M-O stretching modes with appropriate HD, D2, (16,18)O2, and (18)O2 isotopic shifts. The HMOH molecules were characterized by O-H, M-H, and M-O stretching modes and an M-O-H bending mode, which were particularly strong in pure H2/D2. Analogous Zn and Cd atom reactions with H2O2 in excess argon produced the same M(OH)2 absorptions. Density functional theory and MP2 calculations reproduce the IR spectra of these molecules. The bonding of Group 12 metal dihydroxides and comparison to Group 2 dihydroxides are discussed. Although the Group 12 dihydroxide O-H stretching frequencies are lower, calculated charges show that the Group 2 dihydroxide molecules are more ionic.
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Affiliation(s)
- Xuefeng Wang
- Chemistry Department, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319, USA
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Dong J, Miao L, Zhou M. Experimental and theoretical characterization of a C2H2O2+ cation in solid argon. J Chem Phys 2003. [DOI: 10.1063/1.1588633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dong J, Wang Y, Zhou M. The vibrational spectrum of the MnO2− and MnO4− anions in solid argon. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01381-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhou M, Shao L, Miao L. Matrix Isolation Infrared Spectroscopic and Density Functional Theoretical Calculations of the GeO2- and GeO4- Anions. J Phys Chem A 2002. [DOI: 10.1021/jp020030j] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mingfei Zhou
- Department of Chemistry and Laser Chemistry Institute, Fudan University, Shanghai 200433, P. R. China
| | - Limin Shao
- Department of Chemistry and Laser Chemistry Institute, Fudan University, Shanghai 200433, P. R. China
| | - Lei Miao
- Department of Chemistry and Laser Chemistry Institute, Fudan University, Shanghai 200433, P. R. China
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Miao L, Shao L, Wang W, Fan K, Zhou M. Matrix isolation FTIR spectroscopic and density functional theoretical studies of the O2SiCO and O2Si(CO)2 molecules. J Chem Phys 2002. [DOI: 10.1063/1.1452727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Zhou M, Zhang L, Lu H, Shao L, Chen M. Reaction of silicon dioxide with water: a matrix isolation infrared and density functional theoretical study. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(01)00767-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Dong J, Miao L, Zhou M. Infrared spectra and density functional calculations of the SiCO4 molecule in solid argon. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00145-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Reactions of silicon dioxide with ammonia molecules: formation and characterization of the SiO2–NH3 complex and the H2NSiOOH molecule. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01192-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Shao L, Zhang L, Chen M, Lu H, Zhou M. Reactions of titanium oxides with water molecules. A matrix isolation FTIR and density functional study. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00675-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lugez CL, Thompson WE, Jacox ME. The infrared spectra of OCS+ and OCS− trapped in solid neon. J Chem Phys 2001. [DOI: 10.1063/1.1370551] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cohen RD, Sherrill CD. The performance of density functional theory for equilibrium molecular properties of symmetry breaking molecules. J Chem Phys 2001. [DOI: 10.1063/1.1365419] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Thompson WE, Jacox ME. The infrared spectra of the NH3-dn+ cations trapped in solid neon. J Chem Phys 2001. [DOI: 10.1063/1.1349087] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang L, Zhou M, Chen M, Qin Q. Dioxygen bound to copper and nickel halides: matrix-isolation FTIR and DFT studies on ClCu(O2) and ClNi(O2) molecules. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00639-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhou M, Citra A, Liang B, Andrews L. Infrared Spectra and Density Functional Calculations of MO2, MO3, (O2)MO2, MO4, MO2- (M = Re, Ru, Os) and ReO3-, ReO4- in Solid Neon and Argon. J Phys Chem A 2000. [DOI: 10.1021/jp993026p] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingfei Zhou
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901
| | - Angelo Citra
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901
| | - Binyong Liang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901
| | - Lester Andrews
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901
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Lugez CL, Thompson WE, Jacox ME, Snis A, Panas I. Infrared spectra of (NO)2+, (NO)2−, and (NO)3− trapped in solid neon. J Chem Phys 1999. [DOI: 10.1063/1.478967] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhou M, Hacaloglu J, Andrews L. Infrared spectra of cyclic-O6+ and trans-O6+ in solid neon and argon. J Chem Phys 1999. [DOI: 10.1063/1.478910] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lugez CL, Jacox ME, Johnson RD. Vibrational spectra of molecular ions isolated in solid neon. XV. Infrared spectroscopic evidence for NeHF+ and HFFH+. J Chem Phys 1999. [DOI: 10.1063/1.478402] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Lugez CL, Jacox ME, Johnson RD. Matrix isolation study of the interaction of excited neon atoms with CCl4: Infrared spectra of the ion products and of Cl2CCl⋅⋅Cl. J Chem Phys 1998. [DOI: 10.1063/1.477397] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sherrill CD, Krylov AI, Byrd EFC, Head-Gordon M. Energies and analytic gradients for a coupled-cluster doubles model using variational Brueckner orbitals: Application to symmetry breaking in O4+. J Chem Phys 1998. [DOI: 10.1063/1.477023] [Citation(s) in RCA: 219] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lugez CL, Forney D, Jacox ME, Irikura KK, Thompson WE. Infrared spectra of molecular ions derived from the hydrogen and methyl halides trapped in solid neon. J Mol Struct 1998. [DOI: 10.1016/s0022-2860(98)00455-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lugez CL, Jacox ME, King RA, Schaefer HF. Experimental and ab initio study of the infrared spectra of ionic species derived from SF6 and SF4 and trapped in solid neon. J Chem Phys 1998. [DOI: 10.1063/1.476440] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chertihin GV, Andrews L. On the spectrum and structure of the isolated O4− anion in solid argon. J Chem Phys 1998. [DOI: 10.1063/1.476047] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lugez CL, Jacox ME, Thompson WE. The vibrational spectra of molecular ions isolated in solid neon. XIII. Ions derived from HBr and HI. J Chem Phys 1996. [DOI: 10.1063/1.472262] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lugez CL, Thompson WE, Jacox ME. Matrix isolation study of the interaction of excited neon atoms with O3: Infrared spectrum of O−3 and evidence for the stabilization of O2⋅⋅⋅O+4. J Chem Phys 1996. [DOI: 10.1063/1.472533] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jacox ME, Irikura KK, Thompson WE. Matrix isolation study of the interaction of excited neon atoms with BCl3: Infrared spectra of BCl+3, BCl+2, and BCl−3. J Chem Phys 1996. [DOI: 10.1063/1.471622] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jacox ME, Irikura KK, Thompson WE. Matrix isolation study of the interaction of excited neon atoms with SiF4: Infrared spectra of SiF+3 and SiF−3. J Chem Phys 1995. [DOI: 10.1063/1.470726] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Forney D, Jacox ME, Thompson WE. The vibrational spectra of molecular ions isolated in solid neon. XII. HCl+, (HCl)+2, ClHCl−, and O2⋅⋅HCl+. J Chem Phys 1995. [DOI: 10.1063/1.469749] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jacox ME, Thompson WE. Matrix isolation study of the interaction of excited neon atoms with BF3: Infrared spectra of BF2, BF+2, BF+3, and BF−3. J Chem Phys 1995. [DOI: 10.1063/1.469523] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jacox ME, Thompson WE. Matrix isolation study of the interaction of excited neon atoms with NF3. Infrared spectra of NF+3, NF+2, and NF−2. J Chem Phys 1995. [DOI: 10.1063/1.469446] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Forney D, Jacox ME, Irikura KK. Matrix isolation study of the interaction of excited neon atoms with CF4. Infrared spectra of CF+3 and CF−3. J Chem Phys 1994. [DOI: 10.1063/1.468094] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Barnes LA, Lindh R. Symmetry breaking in O+4: an application of the Brueckner coupled-cluster method. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00442-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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