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Ntui TN, Oyo-Ita EE, Agwupuye JA, Benjamin I, Eko IJ, Ubana EI, Etiowo KM, Eluwa EC, Imojara A. Synthesis, Spectroscopic, DFT Study, and Molecular Modeling of Thiophene-Carbonitrile Against Enoyl-ACP Reductase Receptor. CHEMISTRY AFRICA 2022. [DOI: 10.1007/s42250-022-00544-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Ofem MI, Louis H, Agwupuye JA, Ameuru US, Apebende GC, Gber TE, Odey JO, Musa N, Ayi AA. Synthesis, spectral characterization, and theoretical investigation of the photovoltaic properties of (E)-6-(4-(dimethylamino)phenyl)diazenyl)-2-octyl-benzoisoquinoline-1, 3-dione. BMC Chem 2022; 16:109. [PMID: 36463218 PMCID: PMC9719173 DOI: 10.1186/s13065-022-00896-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 11/04/2022] [Indexed: 12/04/2022] Open
Abstract
This research work focuses on the synthesis, characterization through spectra (FT-IR, UV-vis, and 1H-NMR) investigations, and the use of density functional theory (DFT) along with time-dependent density functional theory (TD-DFT) to investigate the electronic, structural, reactivity, photophysical properties, and the photovoltaic properties of a novel (E)-6-(4-(dimethylamino)phenyl)diazenyl)-2-octyl-benzoisoquinoline-1,3-dione. The structure of the synthesized compound was modeled using the Gaussian09W and GaussView6.0.16 softwares employing B3LYP and 6-31 + G(d) basis set. The DFT studies was performed in order to investigate the Frontier Molecular Orbital (FMO), Natural Bond Orbital (NBO), charge distribution, Nonlinear Optics (NLO), and stability of the titled molecule. The HOMO-LUMO energy gap which corresponds to the difference between HOMO and LUMO energies of the studied compound was found to be 2.806 eV indicating stiff and smooth nature of the titled molecule. This accounts for the less stability and high chemical reactivity of the compound. The photovoltaic properties were conducted to evaluate the light harvesting efficiency (LHE), short circuit current density (JSC), Gibbs free energy of injection ([Formula: see text]), open cycled voltage (VOC) and Gibbs free energy regeneration ([Formula: see text]) and solar cell conversion efficiency. Interestingly, the results obtained were found to be in good agreement with other experimental and computational findings.
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Affiliation(s)
- Mbang I. Ofem
- grid.411933.d0000 0004 1808 0571Department of Chemistry, Faculty of Physical Sciences, Cross River University of Technology, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - John A. Agwupuye
- grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Umar S. Ameuru
- grid.411225.10000 0004 1937 1493Department of Polymer and Textile Engineering, Ahmadu Bello University, Zaria, Nigeria
| | - Gloria C. Apebende
- grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Terkumbur E. Gber
- grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Joseph O. Odey
- grid.413097.80000 0001 0291 6387Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Neksumi Musa
- grid.412552.50000 0004 1764 278XDepartment of Environmnetal Sciences, Sharda University, Greater Noida, India
| | - Ayi A. Ayi
- grid.413097.80000 0001 0291 6387Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria ,grid.413097.80000 0001 0291 6387Inorganic Materials Research Laboratory, Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
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Sagaama A, Noureddine O, Brandán SA, Jędryka AJ, Flakus HT, Ghalla H, Issaoui N. Molecular docking studies, structural and spectroscopic properties of monomeric and dimeric species of benzofuran-carboxylic acids derivatives: DFT calculations and biological activities. Comput Biol Chem 2020; 87:107311. [PMID: 32604029 DOI: 10.1016/j.compbiolchem.2020.107311] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/14/2020] [Accepted: 06/15/2020] [Indexed: 01/18/2023]
Abstract
Structural optimization, molecular docking analysis, electronic and vibrational properties have been investigated for the 1-benzofuran-2-carboxylic acid (2BF) and 1-benzofuran-3-carboxylic acid (3BF) using DFT/B3LYP/6-311++G(d,p) level of theory. The theoretical parameters have a very good consistency with the experimental ones. The weak intermolecular interactions were analyzed by different tool such as: Hirshfeld surfaces, topological analysis and natural bond orbital studies. The nonlinear optical properties have been investigated. Molecular electrostatic potential and frontier molecular orbitals (FMOs) analysis have been carried out to understand the reactivity of the molecule. In addition, TD-DFT calculation is initiated to simulate the UV-vis absorption spectrum and to determine several important electronic properties like HOMO-LUMO gap energy and electronic transitions. The complete vibrational assignments and the force constants were reported for monomer and dimers of both acids. The biological activities of the tow acids have been studied via molecular docking analysis. The later calculations prove that the studied acids have an inhibitor effect against cancer and microbial diseases.
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Affiliation(s)
- Abir Sagaama
- University of Monastir, Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, Monastir, 5079, Tunisia
| | - Olfa Noureddine
- University of Monastir, Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, Monastir, 5079, Tunisia
| | - Silvia Antonia Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Anna Jarczyk- Jędryka
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007, Katowice, Poland
| | - Henryk T Flakus
- Retired from the Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland
| | - Houcine Ghalla
- University of Monastir, Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, Monastir, 5079, Tunisia
| | - Noureddine Issaoui
- University of Monastir, Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, Monastir, 5079, Tunisia.
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Iramain MA, Castillo MV, Davies L, Manzur ME, Brandán SA. Structural and SQMFF study of potent insecticide 4′,4′-DDT combining the FT-IR and FT-Raman spectra with DFT calculations. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Manzur ME, Brandán SA. S(-) and R(+) species derived from antihistaminic promethazine agent: structural and vibrational studies. Heliyon 2019; 5:e02322. [PMID: 31535039 PMCID: PMC6744594 DOI: 10.1016/j.heliyon.2019.e02322] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/19/2019] [Accepted: 08/13/2019] [Indexed: 01/18/2023] Open
Abstract
Structural and vibrational properties of free base, cationic and hydrochloride species derived from both S(-) and R(+) enantiomers of antihistaminic promethazine (PTZ) agent have been theoretically evaluated in gas phase and in aqueous solution by using the hybrid B3LYP/6-31G* calculations. The initial structures of S(-) and R(+) enantiomers of hydrochloride PTZ were those polymorphic forms 1 and 2 experimentally determined by X-ray diffraction. Here, all structures in aqueous solution were optimized at the same level of theory by using the polarized continuum (PCM) and the universal solvation model. As was experimentally reported, variations in the unit cell lead to slight energy, density, and melting point differences between the two forms but, this behavior is not carried through in isotropic condition, like in solution with non-chiral solvents. Hence, the N-C distances, Mulliken, atomic natural population (NPA) and Merz-Kollman (MK) charges, bond orders, stabilization and solvation energies, frontier orbitals, some descriptors and their topological properties were compared with the antihistaminic cyclizine agent. The frontier orbitals studies show that the free base species of both forms in solution are more reactive than cyclizine. Higher electrophilicity indexes are observed in the cationic and hydrochloride species of PTZ than cyclizine while the cationic species of cyclizine have higher nucleophilicity index than both species of PTZ. The presences of bands attributed to cationic species of both enantiomers are clearly supported by the infrared and Raman spectra in the solid phase. The expected 114, 117 and 120 vibration normal modes for the free base, cationic and hydrochloride species of both forms were completely assigned and the force constants reported. Reasonable concordances among the predicted infrared, Raman, UV-Vis and Electronic Circular Dichroism (ECD) with the corresponding experimental ones were found.
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Affiliation(s)
| | - Silvia Antonia Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica. Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, San Miguel de Tucumán, Tucumán, 4000, Argentina
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Murugavel S, Sundramoorthy S, Subashini R, Pavan P. Synthesis, characterization, pharmacological, molecular modeling and antimicrobial activity evaluation of novel isomer quinoline derivatives. Struct Chem 2018. [DOI: 10.1007/s11224-018-1149-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Kose E, Atac A, Bardak F. The structural and spectroscopic investigation of 2-chloro-3-methylquinoline by DFT method and UV–Vis, NMR and vibrational spectral techniques combined with molecular docking analysis. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.099] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Castillo MV, Rudyk RA, Davies L, Brandán SA. Analysis of the structure and the FT-IR and Raman spectra of 2-(4-nitrophenyl)-4H-3,1-benzoxazin-4-one. Comparisons with the chlorinated and methylated derivatives. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.070] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Şen F, Dinçer M, Yilmaz I, Cukurovali A. Spectral and structural analysis on 2-(4-Allyl-5-Mercapto-4H-1,2,4-Triazol-3-yl)Acetic acid: Experimental and theoretical (HF and DFT) studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Murugavel S, Sundramoorthy S, Lakshmanan D, Subashini R, Pavan Kumar P. Synthesis, crystal structure analysis, spectral (NMR, FT-IR, FT-Raman and UV–Vis) investigations, molecular docking studies, antimicrobial studies and quantum chemical calculations of a novel 4-chloro-8-methoxyquinoline-2(1H)-one: An effective antimicrobial agent and an inhibition of DNA gyrase and lanosterol-14α-demethylase enzymes. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.11.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Romani D, Márquez MJ, Márquez MB, Brandán SA. Structural, topological and vibrational properties of an isothiazole derivatives series with antiviral activities. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.07.038] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Chain FE, Romano E, Leyton P, Paipa C, Catalán CAN, Fortuna M, Brandán SA. Vibrational and structural study of onopordopicrin based on the FTIR spectrum and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 150:381-389. [PMID: 26057092 DOI: 10.1016/j.saa.2015.05.072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/02/2015] [Accepted: 05/23/2015] [Indexed: 06/04/2023]
Abstract
In the present work, the structural and vibrational properties of the sesquiterpene lactone onopordopicrin (OP) were studied by using infrared spectroscopy and density functional theory (DFT) calculations together with the 6-31G(∗) basis set. The harmonic vibrational wavenumbers for the optimized geometry were calculated at the same level of theory. The complete assignment of the observed bands in the infrared spectrum was performed by combining the DFT calculations with Pulay's scaled quantum mechanical force field (SQMFF) methodology. The comparison between the theoretical and experimental infrared spectrum demonstrated good agreement. Then, the results were used to predict the Raman spectrum. Additionally, the structural properties of OP, such as atomic charges, bond orders, molecular electrostatic potentials, characteristics of electronic delocalization and topological properties of the electronic charge density were evaluated by natural bond orbital (NBO), atoms in molecules (AIM) and frontier orbitals studies. The calculated energy band gap and the chemical potential (μ), electronegativity (χ), global hardness (η), global softness (S) and global electrophilicity index (ω) descriptors predicted for OP low reactivity, higher stability and lower electrophilicity index as compared with the sesquiterpene lactone cnicin containing similar rings.
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Affiliation(s)
- Fernando E Chain
- INQUINOA-CONICET, Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 S.M. de Tucumán, Tucumán, Argentina
| | - Elida Romano
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 San Miguel de Tucumán, Tucumán, Argentina
| | - Patricio Leyton
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Carolina Paipa
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello (UNAB), Quillota 910, Viña del Mar, Chile
| | - César A N Catalán
- INQUINOA-CONICET, Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 S.M. de Tucumán, Tucumán, Argentina
| | - Mario Fortuna
- Cátedra de Química Orgánica, Dpto. Cs. Básicas, Facultad de Agronomía y Zootecnia, Universidad Nacional de Tucumán, Av. Néstor Kirchner, 4000 San Miguel de Tucumán, Tucumán, Argentina
| | - Silvia Antonia Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 San Miguel de Tucumán, Tucumán, Argentina.
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Chain FE, Leyton P, Paipa C, Fortuna M, Brandán SA. FT-IR, FT-Raman, UV-visible, and NMR spectroscopy and vibrational properties of the labdane-type diterpene 13-epi-sclareol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:303-13. [PMID: 25498827 DOI: 10.1016/j.saa.2014.11.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/19/2014] [Accepted: 11/20/2014] [Indexed: 05/08/2023]
Abstract
In this work, FT-IR, FT-Raman, UV-Visible and NMR spectroscopies and density functional theory (DFT) calculations were employed to study the structural and vibrational properties of the labdane-type diterpene 13-epi-sclareol using the hybrid B3LYP method together with the 6-31G(∗) basis set. Three stable structures with minimum energy found on the potential energy curves (PES) were optimized, and the corresponding molecular electrostatic potentials, atomic charges, bond orders, stabilization energies and topological properties were computed at the same approximation level. The complete assignment of the bands observed in the vibrational spectrum of 13-epi-sclareol was performed taking into account the internal symmetry coordinates for the three structures using the scaled quantum mechanical force field (SQMFF) methodology at the same level of theory. In addition, the force constants were calculated and compared with those reported in the literature for similar compounds. The predicted vibrational spectrum and the calculated (1)H NMR and (13)C NMR chemical shifts are in good agreement with the corresponding experimental results. The theoretical UV-Vis spectra for the most stable structure of 13-epi-sclareol demonstrate a better correlation with the corresponding experimental spectrum. The study of the three conformers by means of the theory of atoms in molecules (AIM) revealed different H bond interactions and a strong dependence of the interactions on the distance between the involved atoms. Furthermore, the natural bond orbital (NBO) calculations showed the characteristics of the electronic delocalization for the two six-membered rings with chair conformations.
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Affiliation(s)
- Fernando E Chain
- INQUINOA-CONICET, Instituto de Química Orgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Patricio Leyton
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Carolina Paipa
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, Quillota 910, Viña del Mar, Chile
| | - Mario Fortuna
- Cátedra de Química Orgánica, Dpto. Cs. Básicas, Facultad de Agronomía y Zootecnia, Universidad Nacional de Tucumán, Av. Néstor Kirchner, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Silvia A Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina.
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Castillo MV, Pergomet JL, Carnavale GA, Davies L, Zinczuk J, Brandán SA. A complete vibrational study on a potential environmental toxicant agent, the 3,3',4,4'-tetrachloroazobenzene combining the FTIR, FTRaman, UV-Visible and NMR spectroscopies with DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:577-586. [PMID: 25106816 DOI: 10.1016/j.saa.2014.07.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 07/15/2014] [Accepted: 07/19/2014] [Indexed: 06/03/2023]
Abstract
In this study 3,3',4,4'-tetrachloroazobenzene (TCAB) was prepared and then characterized by infrared, Raman, multidimensional nuclear magnetic resonance (NMR) and ultraviolet-visible spectroscopies. The density functional theory (DFT) together with the 6-31G(*) and 6-311++G(**) basis sets were used to study the structures and vibrational properties of the two cis and trans isomers of TCAB. The harmonic vibrational wavenumbers for the optimized geometries were calculated at the same theory levels. A complete assignment of all the observed bands in the vibrational spectra of TCAB was performed combining the DFT calculations with the scaled quantum mechanical force field (SQMFF) methodology. The molecular electrostatic potentials, atomic charges, bond orders and frontier orbitals for the two isomers of TCAB were compared and analyzed. The comparison of the theoretical ultraviolet-visible spectrum with the corresponding experimental demonstrates a good concordance while the calculated (1)H and (13)C chemicals shifts are in good conformity with the corresponding experimental NMR spectra of TCAB in solution. The npp(*) transitions for both forms were studied by natural bond orbital (NBO) while the topological properties were calculated by employing Bader's Atoms in the Molecules (AIM) theory. This study shows that the cis and trans isomers exhibit different structural and vibrational properties and absorption bands.
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Affiliation(s)
- María V Castillo
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 San Miguel de Tucumán, Tucumán, Argentina
| | - Jorgelina L Pergomet
- Instituto de Química Rosario (CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Suipacha 531, 2000 Rosario, Santa Fé, Argentina
| | - Gustavo A Carnavale
- Instituto de Química Rosario (CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Suipacha 531, 2000 Rosario, Santa Fé, Argentina
| | - Lilian Davies
- Instituto de Investigaciones para la Industria Química (INIQUI, CONICET), Universidad Nacional de Salta, Av. Bolivia 5150, 4400 Salta, Argentina
| | - Juan Zinczuk
- Instituto de Química Rosario (CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Suipacha 531, 2000 Rosario, Santa Fé, Argentina
| | - Silvia A Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000 San Miguel de Tucumán, Tucumán, Argentina.
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Chain F, Romano E, Leyton P, Paipa C, Catalán CAN, Fortuna MA, Brandán SA. An experimental study of the structural and vibrational properties of sesquiterpene lactone cnicin using FT-IR, FT-Raman, UV–visible and NMR spectroscopies. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.02.057] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Ghalla H, Issaoui N, Castillo MV, Brandán SA, Flakus HT. A complete assignment of the vibrational spectra of 2-furoic acid based on the structures of the more stable monomer and dimer. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 121:623-31. [PMID: 24291575 DOI: 10.1016/j.saa.2013.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Revised: 10/10/2013] [Accepted: 11/03/2013] [Indexed: 01/18/2023]
Affiliation(s)
- Houcine Ghalla
- Quantum Physics Laboratory, Faculty of Sciences of Monastir, Monastir 5000, Tunisia
| | - Noureddine Issaoui
- Quantum Physics Laboratory, Faculty of Sciences of Monastir, Monastir 5000, Tunisia
| | - María Victoria Castillo
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (4000), San Miguel de Tucumán, Tucumán, Argentina
| | - Silvia Antonia Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (4000), San Miguel de Tucumán, Tucumán, Argentina.
| | - Henryk T Flakus
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, Pl-40-006 Katowice, Poland
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Lizarraga E, Romano E, Raschi AB, Leyton P, Paipa C, Catalán CA, Brandán SA. A structural and vibrational study of dehydrofukinone combining FTIR, FTRaman, UV–visible and NMR spectroscopies with DFT calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.05.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Guzzetti KA, Brizuela AB, Romano E, Brandán SA. Structural and vibrational study on zwitterions of l-threonine in aqueous phase using the FT-Raman and SCRF calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.04.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Roldán ML, Ledesma AE, Raschi AB, Castillo MV, Romano E, Brandán SA. A new experimental and theoretical investigation on the structures of aminoethyl phosphonic acid in aqueous medium based on the vibrational spectra and DFT calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.02.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Romano E, Brizuela AB, Guzzetti KA, Brandán SA. An experimental and theoretical study on the hydration in aqueous medium of the antihypertensive agent tolazoline hydrochloride. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Piro OE, Echeverría GA, Lizarraga E, Romano E, Catalán CAN, Brandán SA. Molecular structure of 4-hidroxy-3-(3-methyl-2-butenyl) acetophenone, a plant antifungal, by X-ray diffraction, DFT calculation, and NMR and FTIR spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 101:196-203. [PMID: 23103461 DOI: 10.1016/j.saa.2012.09.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 09/22/2012] [Accepted: 09/26/2012] [Indexed: 06/01/2023]
Abstract
The molecular structure of two mixed and closely related conformers of the title compound, C13H16O2, found in the solid with unequal occupancies has been determined by X-ray diffraction methods. The substance crystallizes in the monoclinic Pca2(1) space group with a=17.279(2), b=5.1716(7), c=12.549(2)Å, and Z=4 molecules per unit cell. The structure was solved from 1314 reflections with I>2σI and refined to an agreement R1-factor of 0.049. The minor conformer (34.7%) is nearly mirror-related to and extensively overlapped with the major one. The skeleton of the 4-hydroxyacetophenone molecular fragment and the prenyl group, (CH2)(CH)C(CH3)2, pendant arm attached to it are both planar and perpendicular to each other. A strong intermolecular O-H⋯O bond links neighboring molecules in the lattice to produce a polymeric structure. The conformational structures of the compound in the gas phase have been calculated by the DFT method and the geometrical results have been compared with the X-ray data. These data allow a complete assignment of vibration modes in the solid state FTIR and Raman spectra. The calculated 1H and 13C chemicals shifts are in good agreement with the corresponding experimental NMR spectra of the compound in solution.
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Affiliation(s)
- Oscar Enrique Piro
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), C.C. 67, 1900 La Plata, Argentina
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Szafran M, Katrusiak A, Dega-Szafran Z, Kowalczyk I. Structure of dimethylphenyl betaine hydrochloride studied by X-ray diffraction, DFT calculation, NMR and FTIR spectra. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.07.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Romano E, Castillo MV, Pergomet JL, Zinczuk J, Brandán SA. Synthesis, Structural Study and Spectroscopic Characterization of a Quinolin-8-Yloxy Derivative with Potential Biological Properties. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ojsta.2013.21002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Structural study and vibrational spectra of 3-amino-2-(4-chlorophenyl) quinazolin-4(3H)-one. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.06.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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