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Koput J. Ab Initio Ground-State Potential Energy Function and Vibration-Rotation Energy Levels of Magnesium Monohydride. J Phys Chem A 2024; 128:3855-3863. [PMID: 38691512 PMCID: PMC11103694 DOI: 10.1021/acs.jpca.4c01757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/11/2024] [Accepted: 04/17/2024] [Indexed: 05/03/2024]
Abstract
The accurate potential energy function of magnesium monohydride in its X2Σ+ state has been determined from ab initio calculations. The vibration-rotation energy levels of the main isotopologue 24MgH were predicted to near the "spectroscopic" accuracy. The scalar relativistic, adiabatic, and nonadiabatic effects were discussed.
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Affiliation(s)
- Jacek Koput
- Department of Chemistry, Adam
Mickiewicz University, 61-614 Poznań, Poland
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2
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Hearne TS, Wild DA, McKinley AJ. A matrix isolation ESR investigation of Mg +-N 2. J Chem Phys 2019; 150:184310. [DOI: 10.1063/1.5090923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Thomas S. Hearne
- Chemistry, School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
| | - Duncan A. Wild
- Chemistry, School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
| | - Allan J. McKinley
- Chemistry, School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
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3
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Chattopadhyaya S. Electronic states and spectroscopic properties of MgH in absence and presence of spin–orbit coupling − a configuration interaction study. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1213911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Habli H, Mejrissi L, Issaoui N, Yaghmour SJ, Oujia B, Gadéa FX. Ab initiocalculation of the electronic structure of the strontium hydride ion (SrH+). INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2014. [DOI: 10.1002/qua.24813] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Héla Habli
- Laboratoire de Physique Quantique, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
| | - Leila Mejrissi
- Laboratoire de Physique Quantique, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
| | - Noureddine Issaoui
- Laboratoire de Physique Quantique, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
| | - Saud Jamil Yaghmour
- King Abdulaziz University, Faculty of Science; Department of Physics; Jeddah Kingdom of Saudi Arabia
| | - Brahim Oujia
- Laboratoire de Physique Quantique, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
- King Abdulaziz University, Faculty of Science; Department of Physics; Jeddah Kingdom of Saudi Arabia
| | - Florent Xavier Gadéa
- Laboratoire de Chimie et Physique Quantique; UMR5626 du CNRS, Université de Toulouse, UPS; 118 route de Narbonne 31062 Toulouse Cedex 4 France
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Steimle TC, Zhang R, Wang H. The electric dipole moment of magnesium deuteride, MgD. J Chem Phys 2014; 140:224308. [DOI: 10.1063/1.4878414] [Citation(s) in RCA: 5] [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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Bucchino MP, Ziurys LM. Terahertz spectroscopy of 25MgH (X2Σ+) and (67)ZnH (X2Σ+): bonding in simple metal hydrides. J Phys Chem A 2013; 117:9732-7. [PMID: 23517252 DOI: 10.1021/jp3123743] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Pure rotational spectra of (25)MgH (X(2)Σ(+)) and (67)ZnH (X(2)Σ(+)) were recorded using direct absorption techniques. These free radicals were synthesized by the reaction of metal vapor, generated in a Broida-type oven, with H2 in a dc discharge. The N = 0 → 1 and N = 1 → 2 transitions were recorded for both species in the frequency range 342-789 GHz. Spin-rotation and metal and proton hyperfine interactions were resolved in the spectra. From these data, rotational, fine structure, and hyperfine constants were determined, including the Fermi contact, dipolar, and electric quadrupole parameters of the (25)Mg and (67)Zn nuclei. Comparison of the metal and proton hyperfine terms suggests that the unpaired electron resides in a σ molecular orbital that has significant s contributions from both the metal and the hydrogen atoms. The dipolar terms for both metals are relatively large, in contrast to those of the proton, and indicate spσ and possibly sdσ (zinc only) orbital hybridization. The quadrupole constants arise principally from the p/d orbital character of the unpaired electron, although there is a non-negligible polarization contribution. These results suggest significant covalent character in both MgH and ZnH, in contrast to their fluoride analogs.
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Affiliation(s)
- Matthew P Bucchino
- Department of Chemistry and Biochemistry, Department of Astronomy and Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, Arizona 85721, United States
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Koput J. The ab initio ground-state potential energy function of beryllium monohydride, BeH. J Chem Phys 2011; 135:244308. [DOI: 10.1063/1.3671610] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lien CY, Williams SR, Odom B. Optical pulse-shaping for internal cooling of molecules. Phys Chem Chem Phys 2011; 13:18825-9. [DOI: 10.1039/c1cp21201j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ab-initio calculation of the ground and excited states of MgH using a pseudopotential approach. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.01.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Velasco A, Lavín C, Martín I, Pitarch-Ruiz J, Sánchez-Marín J. Theoretical study of the discrete and continuum spectrum of BeH. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.07.099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Pitarch-Ruiz J, Sánchez-Marin J, Velasco AM, Martin I. Full configuration interaction calculation of BeH adiabatic states. J Chem Phys 2008; 129:054310. [DOI: 10.1063/1.2953584] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Chen J, Steimle TC. The permanent electric dipole moment of calcium monodeuteride. J Chem Phys 2008; 128:144312. [DOI: 10.1063/1.2899651] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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Pitarch-Ruiz J, Sánchez-Marín J, Velasco AM. Full configuration interaction calculation of the low lying valence and Rydberg states of BeH. J Comput Chem 2007; 29:523-32. [PMID: 17722010 DOI: 10.1002/jcc.20811] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The all-electron full configuration interaction (FCI) vertical excitation energies for some low lying valence and Rydberg excited states of BeH are presented in this article. A basis set of valence atomic natural orbitals has been augmented with a series of Rydberg orbitals that have been generated as centered onto the Be atom. The resulting basis set can be described as 4s2p1d/2s1p (Be/H) + 4s4p3d. It allows to calculate Rydberg states up to n= {3,4,5} of the s, p, and d series of Rydberg states. The FCI vertical ionization potential for the same basis set and geometry amounts to 8.298 eV. Other properties such as FCI electric dipole and quadrupole moments and FCI transition dipole and quadrupole moments have also been calculated. The results provide a set of benchmark values for energies, wave functions, properties, and transition properties for the five electron BeH molecule. Most of the states have large multiconfigurational character in spite of their essentially single excited nature and a number of them present an important Rydberg-valence mixing that is achieved through the mixed nature of the particle MO of the single excitations.
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Affiliation(s)
- J Pitarch-Ruiz
- Institut de Ciencia Molecular, Universitat de València, Campus de Paterna, Paterna E-46980 (Valencia), Spain
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Kerkines ISK, Mavridis A. A theoretical study of calcium monohydride, CaH: low-lying states and their permanent electric dipole moments. J Phys Chem A 2007; 111:371-4. [PMID: 17214474 DOI: 10.1021/jp064705k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Potential energy curves, energy parameters, and spectroscopic values for the X (2)Sigma(+), A (2)Pi, B (2)Sigma(+), a (4)Pi, and b (4)Sigma(+), states of CaH have been calculated using the multireference configuration interaction and coupled cluster levels of theory, while employing quantitative basis sets (of augmented quintuple-zeta quality) and taking also into account core/valence correlation and one-electron relativistic effects. For the ground (X (2)Sigma(+)) and the first two following excited states (A (2)Pi, B (2)Sigma(+)) of CaH, the permanent electric dipole moments have been calculated. Our best finite field dipole moment of the A (2)Pi state of 2.425 D (upsilon = 0) is in very good agreement with the experimental literature value of 2.372(12) D. However, a discrepancy is observed in the dipole moment of the X (2)Sigma(+) state. Our most extensive calculation gives mu = 2.623 D (upsilon = 0), which is considerably smaller than the experimental value of mu = 2.94(16) D (upsilon = 0). Small van der Waals minima were found for both "repulsive" quartet states. Spectroscopic constants and energy parameters for all states are in remarkable agreement with available experimental values.
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Affiliation(s)
- Ioannis S K Kerkines
- Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, P.O. Box 64 004, 157 10 Zografou, Athens, Greece
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Ricardo Viteri C, Gilkison AT, Rixon SJ, Grant ER. Rovibrational characterization of XΣ+2B11H+ by the extrapolation of photoselected high Rydberg series in B11H. J Chem Phys 2006; 124:144312. [PMID: 16626201 DOI: 10.1063/1.2185635] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Optical-optical-optical triple-resonance spectroscopy of (11)BH isolates high Rydberg states that form series converging to rotational state specific ionization potentials in the vibrational levels of (11)BH(+) from nu(+)=0 through 4. Limits defined by a comprehensive fit of these series to state-detailed thresholds yield rovibrational constants describing the X (2)Sigma(+) state of (11)BH(+). The data provide a first determination of the vibrational-rotational interaction parameter alpha(e)=0.4821 cm(-1) and a more accurate estimate of omega(e)=2526.58 cm(-1) together with the higher-order anharmonic terms omega(e)x(e)=61.98 cm(-1) and omega(e)y(e)=-1.989 cm(-1). The deperturbation and global fit of series to state-detailed limits also yield a precise value of the adiabatic ionization potential of (11)BH of 79 120.3+/-0.1 cm(-1), or 9.810 33+/-1x10(-5) eV. High precision is afforded here by the use of graphical analysis techniques, narrow-bandwidth laser systems, and an analysis of newly observed, high principal quantum number Rydberg states that conform well with Hund's case (d) electron-core coupling limit.
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Affiliation(s)
- C Ricardo Viteri
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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Patchkovskii S, Strong RT, Pickard CJ, Un S. Gauge invariance of the spin-other-orbit contribution to the g-tensors of electron paramagnetic resonance. J Chem Phys 2005; 122:214101. [PMID: 15974722 DOI: 10.1063/1.1917840] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The spin-other-orbit (SOO) contribution to the g-tensor (DeltagSOO) of electron paramagnetic resonance arises due to the interaction of electron-spin magnetic moment with the magnetic field produced by the orbital motion of other electrons. A similar mechanism is responsible for the leading term in nuclear magnetic-shielding tensors sigma. We demonstrate that analogous to sigma, paramagnetic DeltagSOO contribution exhibits a pronounced dependence on the choice of the magnetic-field gauge. The gauge corrections to DeltagSOO are similar in magnitude, and opposite in sign, to the paramagnetic SOO term. We calculate gauge-invariant DeltagSOO values using gauge-including atomic orbitals and density-functional theory. For organic radicals, complete gauge-invariant DeltagSOO values typically amount to less than 500 parts per million (ppm), and are small compared to other g-tensor contributions. For the first-row transition-metal compounds, DeltagSOO may contribute several thousand ppm to the g-tensor, but are negligible compared to the remaining deviations from experiment. With popular choices for the magnetic-field gauge, the individual gauge-variant contributions may be an order of magnitude higher, and do not provide a reliable estimation of DeltagSOO.
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Affiliation(s)
- S Patchkovskii
- Steacie Institute for Molecular Sciences, National Research Council (NRC) Canada, 100 Sussex Dr., Ottawa, Ontario K1A 0R6, Canada.
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Steimle TC, Chen J, Gengler J. The permanent electric dipole moments of calcium monohydride, CaH. J Chem Phys 2004; 121:829-34. [PMID: 15260612 DOI: 10.1063/1.1759314] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Numerous branch features in the (0,0) A 2Pi-X 2Sigma+ band system of calcium monohydride CaH have been studied by optical Stark spectroscopy. The Stark shifts, Stark splittings, and appearance of electric-field-induced transitions in the high resolution laser-induced fluorescence spectra are analyzed to produce values for the magnitude of the permanent electric dipole moments mid R:micromid R: of 2.94(16) D and 2.372(12) D for the X 2Sigma+(v=0) and A 2Pi(v=0) states, respectively. A comparison with values predicted from a semiempirical electrostatic model and previous ab initio calculations for mid R:micromid R: (X 2Sigma+) is presented. The change in mid R:micromid R: upon excitation from the X 2Sigma+ state to the A 2Pi state is rationalized using a simple molecular orbital description.
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Affiliation(s)
- T C Steimle
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604. USA.
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