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El-Sonbati AZ, Diab MA, Abou-Dobara MI, Eldesoky AM, Issa HR. Synthesis, characterization, electrochemical studies and antimicrobial activities of metal complexes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02354-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Agheli Z, Pordel M, Davoodnia A, Beyramabadi SA. Pyrido[1',2':1,5]pyrazolo[4,3-b]quinolines as New Fluorescent Heterocyclic Systems for Dye-Sensitized Solar Cells. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220070233] [Citation(s) in RCA: 3] [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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3
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Galini M, Salehi M, Kubicki M, Bayat M, Malekshah RE. Synthesis, structural characterization, DFT and molecular simulation study of new zinc-Schiff base complex and its application as a precursor for preparation of ZnO nanoparticle. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127715] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Beyramabadi SA, Saadat-Far M, Faraji-Shovey A, Javan-Khoshkholgh M, Morsali A. Synthesis, experimental and computational characterizations of a new quinoline derived Schiff base and its Mn(II), Ni(II) and Cu(II) complexes. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127898] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Poormirzaei N, Pordel M, Yaghoobi E, Shojaee S, Aminiyanfar M, Gonabadi A. 3-(Hydroxyimino)imidazo[1,2-a]pyridin-2(3H)-ylidene)-1-arylethanones as new red heterocyclic dyes: Synthesis, spectral studies, quantum-chemical investigations, and antibacterial activities. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.1177/1747519819893060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The synthesis, optical properties, theoretical calculations, and antibacterial activities of a series of new red heterocyclic dyes derived from imidazo[1,2- a]pyridine are presented. 3-(Hydroxyimino)imidazo[1,2- a]pyridin-2(3 H)-ylidene)-1-arylethanones are obtained from the reaction of 3-nitroimidazo[1,2- a]pyridine with substituted acetophenone derivatives in good yields (65%–72%). The structures are confirmed by spectral and analytical data, and the optical properties of the dyes are characterized by spectrophotometry. Density functional theory calculations are performed to provide the optimized geometries and relevant frontier orbitals. Calculated electronic absorption spectra are also obtained by the time-dependent density functional theory method. Moreover, the antibacterial activities (minimum inhibitory concentration) of the new dyes against Gram-positive and Gram-negative bacterial species are determined (minimum inhibitory concentration: 5–200 μg mL−1).
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Affiliation(s)
| | - Mehdi Pordel
- Department of Chemistry, Islamic Azad University, Mashhad, Iran
| | - Elnaz Yaghoobi
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Science Branch, Islamic Azad University, Tehran, Iran
| | - Saeed Shojaee
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Science Branch, Islamic Azad University, Tehran, Iran
| | | | - Atoosa Gonabadi
- Department of Chemistry, Islamic Azad University, Mashhad, Iran
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Tanhaei R, Beyramabadi SA, Behmadi H. Geometry, Tautomerism, and Noncovalent Interaction of Bentiromide with a Carbon-Nanotube and γ-Fe2O3 Nanoparticles: A Quantum Mechanical Study. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619060155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Boodram S, Roy S, Singh N, Fairman RA, Peter SC, Rambaran VH. Investigations into an Intramolecular Proton Transfer and Solvent Dependent Acid‐Base Equilibria in 2,6‐Pyridine Diacetic Acid. ChemistrySelect 2019. [DOI: 10.1002/slct.201900331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shivani Boodram
- Department of Biomedical EngineeringThe University of Trinidad and Tobago, Lots 74–98 O'Meara Industrial Estate, Arima Trinidad and Tobago
| | - Soumyabrata Roy
- New Chemistry UnitJawaharlal Nehru Center for Advanced Scientific Research, Jakkur Bangalore, India
| | - Nadia Singh
- Department of ChemistryThe University of The West Indies, St. Augustine Campus, St. Augustine Trinidad and Tobago
| | - Richard A. Fairman
- Department of ChemistryThe University of The West Indies, St. Augustine Campus, St. Augustine Trinidad and Tobago
| | - Sebastian C. Peter
- New Chemistry UnitJawaharlal Nehru Center for Advanced Scientific Research, Jakkur Bangalore, India
| | - Varma H. Rambaran
- Department of Biomedical EngineeringThe University of Trinidad and Tobago, Lots 74–98 O'Meara Industrial Estate, Arima Trinidad and Tobago
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Raouf H, Beyramabadi SA, Allameh S, Morsali A. Synthesis, experimental and theoretical characterizations of a 1,2,4-triazole Schiff base and its nickel(II) complex. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.073] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Flores-García M, Fernández-G JM, Busqueta-Griera C, Gómez E, Hernández-Ortega S, Lamothe-Flores JCD, Gómez-Vidales V, Mejía-Domínguez AM, Anglés-Cano E, de la Peña-Díaz A. New Copper Compounds with Antiplatelet Aggregation Activity. Med Chem 2019; 15:850-862. [PMID: 30799791 DOI: 10.2174/1573406415666190222123207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 01/26/2019] [Accepted: 02/07/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Ischemic heart disease, cerebrovascular accident, and venous thromboembolism have the presence of a thrombotic event in common and represent the most common causes of death within the population. OBJECTIVE Since Schiff base copper(II) complexes are able to interact with polyphosphates (PolyP), a procoagulant and potentially prothrombotic platelet agent, we investigated the antiplatelet aggregating properties of two novel tridentate Schiff base ligands and their corresponding copper( II) complexes. METHODS The Schiff base ligands (L1) and (L2), as well as their corresponding copper(II) complexes (C1) and (C2), were synthesized and characterized by chemical analysis, X-ray diffraction, mass spectrometry, and UV-Visible, IR and far IR spectroscopy. In addition, EPR studies were carried out for (C1) and (C2), while (L1) and (L2) were further analyzed by 1H and 13C NMR. Tests for antiplatelet aggregation activities of all of the four compounds were conducted. RESULTS X-ray diffraction studies show that (L1) and (L2) exist in the enol-imine tautomeric form with a strong intramolecular hydrogen bond. NMR studies show that both ligands are found as enol-imine tautomers in CDCl3 solution. In the solid state, the geometry around the copper(II) ion in both (C1) and (C2) is square planar. EPR spectra suggest that the geometry of the complexes is similar to that observed in the solid state by X-ray crystallography. Compound (C2) exhibited the strongest antiplatelet aggregation activity. CONCLUSION Schiff base copper(II) complexes, which are attracting increasing interest, could represent a new approach to treat thrombosis by blocking the activity of PolyP with a potential anticoagulant activity and, most importantly, demonstrating no adverse bleeding events.
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Affiliation(s)
- Mirthala Flores-García
- Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Tlalpan 14080, Ciudad de México, Mexico
| | - Juan Manuel Fernández-G
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, Mexico
| | - Cristina Busqueta-Griera
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, Mexico
| | - Elizabeth Gómez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, Mexico
| | - Simón Hernández-Ortega
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, Mexico
| | | | - Virginia Gómez-Vidales
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, Mexico
| | - Ana María Mejía-Domínguez
- Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Tlalpan 14080, Ciudad de México, Mexico
| | - Eduardo Anglés-Cano
- INSERM UMR-S1140, Faculty of Sciences, Pharmaceutiques & Biologiques, Avenue de l'Observatoire, 75270 Paris, Cedex 06, France
| | - Aurora de la Peña-Díaz
- Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Tlalpan 14080, Ciudad de México, Mexico.,Facultad de Medicina, Departamento de Farmacología, Universidad Nacional Autónoma de México, Circuito Escolar, Ciudad Universitaria, Coyoacán 04510, Ciudad de México, México
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Sobhani S, Pordel M, Beyramabadi SA. Design, synthesis, spectral, antibacterial activities and quantum chemical calculations of new Cu (II) complexes of heterocyclic ligands. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.08.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Ettehadi Z, Davoodnia A, Khashi M, Ali Beyramabadi S. Tautomerism in the Sulfonamide Moiety: Synthesis, Experimental and Theoretical Characterizations. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618070119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Beyramabadi SA, Javan-Khoshkholgh M, Ostad NJ, Gharib A, Ramezanzadeh M, Sadeghi M, Bazian A, Morsali A. Spectroscopic (Ft-Ir, Nmr, Uv-Vis, Fluorescence) and Dft Studies (Molecular Structure, Ir and Nmr Spectral Assignments, Nbo and Fukui Function) of Schiff Bases Derived from 2-Chloro-3-Quinolinecarboxaldehyde. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618060136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Yavari M, Beyramabadi SA, Morsali A, Bozorgmehr MR. Tautomerization Reaction, Experimental and Theoretical Characterizations of the N,N′-Dipyridoxyl(4-Methyl-1,2-Phenylenediamine) Schiff Base and its Cu(II) Complex. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618050128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Ramezani S, Pordel M, Davoodnia A. Synthesis, spectral, DFT calculations and antibacterial studies of Fe(III) complexes of new fluorescent Schiff bases derived from imidazo[4',5':3,4]benzo[1,2‐
c
]isoxazole. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shirin Ramezani
- Department of Chemistry, Mashhad BranchIslamic Azad University Mashhad Iran
| | - Mehdi Pordel
- Department of Chemistry, Mashhad BranchIslamic Azad University Mashhad Iran
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Beyramabadi SA, Esmaeili B, Gharib A, Khorsandi-Chenarboo M, Morsali A, Khashi M, Sanavi-Khoshnood R. Synthesis, experimental and DFT characterization of the 2-((E)-(2-[(E)-2,3-Dihydroxybenzylideneamino]-5-methylphenyl)iminiomethyl)-6-hydroxyphenolate and its Ni(II) and Cu(II) complexes. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Habibi M, Beyramabadi SA, Allameh S, Khashi M, Morsali A, Pordel M, Khorsandi-Chenarboo M. Synthesis, experimental and theoretical characterizations of a new Schiff base derived from 2-pyridincarboxaldehyde and its Ni (II) complex. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.04.114] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Khashi M, Beyramabadi SA, Davoodnia A, Ettehadi Z. Synthesis, experimental and theoretical characterizations of some new pyrrolo[2,3-d]pyrimidine derivatives bearing an aromatic sulfonamide moiety. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Khaleghi-Rad A, Beyramabadi SA, Morsali A, Ebrahimi M, Khorzandi-Chenarboo M. Tautomerism of the antiepileptic drug Felbamate: A DFT study. J STRUCT CHEM+ 2017. [DOI: 10.1134/s0022476617020044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Beyramabadi SA, Khadivjam T, Gonabadi A, Morsali A, Gharib A, Khashi M, Khorsandi-Chenarboo M. A DFT study on the geometry, tautomerism and noncovalent interactions of the Mepivacaine drug with the pristine SWCNT and –COOH functionalized SWCNT. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2017. [DOI: 10.1142/s0219633617500080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The Mepivacaine drug is used as a local anesthetic in dentistry, which could exist as three different tautomers. Herein, geometry, energy behavior as well as tautomerization of these tautomers have been investigated by employing density functional theory (DFT) and considering the solvent effects with the polarizable continuum model (PCM) model. The most stable tautomer of the Mepivacaine has a carbonyl and an –NH amine groups in its structure. The frontier orbitals and the energy gap of the molecule have been computed using the natural bond orbital analysis (NBO). Also, the armchair (5,5) single wall carbon nanotube (SWCNT) was used for investigation of the noncovalent interactions of the Mepivacaine molecule with the pristine SWCNT and the –COOH functionalized SWCNT in several forms. Geometries of the possible forms have been optimized. The most stable form for noncovalent interactions of the drug with each of the pristine and functionalized SWCNTs have been determined. The intermolecular H-bonds have essential role in energy behavior of the noncovalent interactions between the Mepivacaine drug and the investigated SWCNTs.
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Affiliation(s)
- S. Ali Beyramabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Tina Khadivjam
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Atoosa Gonabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Ali Morsali
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Azar Gharib
- Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Maryam Khashi
- Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Heshmatipour F, Beyramabadi SA, Morsali A, Heravi MM. A DFT study on the geometry, spectroscopic properties, and tautomerization of the local anaesthetic drug prilocaine. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476616060068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Chen Z, Guieu S, White NG, Lelj F, MacLachlan MJ. The Rich Tautomeric Behavior of Campestarenes. Chemistry 2016; 22:17657-17672. [DOI: 10.1002/chem.201603231] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Zhengyu Chen
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Samuel Guieu
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Nicholas G. White
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Francesco Lelj
- La. M.I. and LaSSCAM INSTM Sezione Basilicata; Dipartimento di Chimica; Università della Basilicata; Via dell'Ateneo Lucano 10 85100 Potenza Italy
| | - Mark J. MacLachlan
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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Estimation of Ground-State and Singlet Excited-State Dipole Moments of Substituted Schiff Bases Containing Oxazolidin-2-one Moiety through Solvatochromic Methods. J Fluoresc 2016; 27:151-165. [PMID: 27704234 DOI: 10.1007/s10895-016-1942-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/21/2016] [Indexed: 10/20/2022]
Abstract
Absorption and fluorescence studies on novel Schiff bases (E)-4-(4-(4-nitro benzylideneamino)benzyl)oxazolidin-2-one (NBOA) and (E)-4-(4-(4-chlorobenzylidene amino)benzyl)oxazolidin-2-one (CBOA) were recorded in a series of twelve solvents upon increasing polarity at room temperature. Large Stokes shift indicates bathochromic fluorescence band for both the molecules. The photoluminescence properties of Schiff bases containing electron withdrawing and donating substituents were analyzed. Intramolecular charge transfer behavior can be studied based on the influence of different substituents in Schiff bases. Changes in position and intensity of absorption and fluorescence spectra are responsible for the stabilization of singlet excited-states of Schiff base molecules with different substituents, in polar solvents. This is attributed to the Intramolecular charge transfer (ICT) mechanism. In case of electron donating (-Cl) substituent, ICT contributes largely to positive solvatochromism when compared to electron withdrawing (-NO2) substituent. Ground-state and singlet excited-state dipole moments of NBOA and CBOA were calculated experimentally using solvent polarity function approaches given by Lippert-Mataga, Bakhshiev, Kawskii-Chamma-Viallet and Reichardt. Due to considerable π- electron density redistribution, singlet excited-state dipole moment was found to be greater than ground-state dipole moment. Ground-state dipole moment value which was determined by quantum chemical method was used to estimate excited-state dipole moment using solvatochromic correlations. Kamlet-Abboud-Taft and Catalan multiple linear regression approaches were used to study non-specific solute-solvent interaction and hydrogen bonding interactions in detail. Optimized geometry and HOMO-LUMO energies of NBOA and CBOA have been determined by DFT and TD-DFT/PCM (B3LYP/6-311G (d, p)). Mulliken charges and molecular electrostatic potential have also been evaluated from DFT calculations.
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Mohanan K, Subhadrambika N, Selwin Joseyphus R, Swathy S, Nisha V. Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2012.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Experimental, theoretical and docking studies of 2-hydroxy Schiff base type compounds derived from 2-amino-4-chlorobenzenethiol. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.08.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Demircioğlu Z, Kaştaş ÇA, Büyükgüngör O. The spectroscopic (FT-IR, UV-vis), Fukui function, NLO, NBO, NPA and tautomerism effect analysis of (E)-2-[(2-hydroxy-6-methoxybenzylidene)amino]benzonitrile. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 139:539-548. [PMID: 25579656 DOI: 10.1016/j.saa.2014.11.078] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 10/17/2014] [Accepted: 11/23/2014] [Indexed: 06/04/2023]
Abstract
A new o-hydroxy Schiff base, (E)-2-[(2-hydroxy-6-methoxybenzylidene)amino]benzonitrile was isolated and investigated by experimental and theoretical methodologies. The solid state molecular structure was determined by X-ray diffraction method. The vibrational spectral analysis was carried out by using FT-IR spectroscopy in the range of 4000-400cm(-)(1). Theoretical calculations were performed by density functional theory (DFT) method using 6-31G(d,p) basis set. The results of the calculations were applied to simulated spectra of the title compound, which show excellent agreement with observed spectra. The UV-vis spectrum of the compound was recorded in the region 200-800 nm in several solvents and electronic properties such as excitation energies, and wavelengths were calculated by TD-DFT/B3LYP method. The most prominent transitions were corresponds to π→π∗. Hybrid density functional theory (DFT) was used to investigate the enol-imine and keto-amine tautomers of titled compound. The titled compound showed the preference of enol form, as supported by X-ray and spectroscopic analysis results. The geometric and molecular properties were compaired for both enol-imine and keto-amine forms. Additionally, geometry optimizations in solvent media were performed with the same level of theory by the integral equation formalism polarizable continuum (IEF-PCM). Stability of the molecule arises from hyperconjugative interactions, charge delocalization and intramolecular hydrogen bond has been analyzed using natural bond orbital (NBO) analysis. Mulliken population method and natural population analysis (NPA) have been studied. Also, condensed Fukui function and relative nucleophilicity indices calculated from charges obtained with orbital charge calculation methods (NPA). Molecular electrostatic potential (MEP) and non linear optical (NLO) properties are also examined.
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Affiliation(s)
- Zeynep Demircioğlu
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, TR-55139 Kurupelit-Samsun, Turkey.
| | - Çiğdem Albayrak Kaştaş
- Department of Chemistry, Faculty of Arts and Science, Sinop University, TR-57000 Sinop, Turkey
| | - Orhan Büyükgüngör
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, TR-55139 Kurupelit-Samsun, Turkey
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Sadeghzade Z, Beyramabadi SA, Morsali A. A DFT investigation of structure, spectroscopic properties and tautomerism of the anticonvulsant drug Lyrica. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:637-642. [PMID: 25541402 DOI: 10.1016/j.saa.2014.11.069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Revised: 11/10/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
The Lyrica (Pregabalin) is a novel anticonvulsant and neuropathic pain drug, which could exist as four possible conformers. Herein, employing density functional theory (DFT), and handling the solvent effects with the PCM model, the structural parameters, energetic behavior, natural bond orbital analysis (NBO), as well as tautomerism mechanization of the Lyrica are investigated. The L1 (-OH form) is the most stable conformer of the Lyrica, which can be tautomerized to the L5 (-NH form) tautomer. The tautomerism reaction includes an intramolecular-proton transfer, which affects considerably the structural parameters and atomic charges of the L1. The DFT-computed NMR chemical shifts and IR vibrational frequencies are good in agreement with the experimental values, confirming suitability of the optimized geometry for the Lyrica.
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Affiliation(s)
- Zohre Sadeghzade
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - S Ali Beyramabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
| | - Ali Morsali
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Koca M, Arici C, Muglu H, Vurdu CD, Kandemirli F, Zalaoglu Y, Yildirim G. Quantum chemical calculations and interpretation of electronic transitions and spectroscopic characteristics belonging to 1-(3-Mesityl-3-methylcyclobutyl)-2-(naphthalene-1-yloxy)ethanone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:899-912. [PMID: 25280338 DOI: 10.1016/j.saa.2014.08.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 08/08/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
This comprehensive study reports the synthesis of the title compound, 1-(3-Mesityl-3-methylcyclobutyl)-2-(naphthalene-1-yloxy)ethanone (C26H28O2), and identification of the molecule by means of the standard experimental methods such as single-crystal X-ray diffraction, ultra violet-visible (UV-vis) spectra, Fourier transform infrared (FTIR) spectra, (13)C and (1)H NMR chemical shifts and quantum chemical calculations using density functional theory (B3LYP) method for the first time. The experimental results observed display that the synthesis of the C26H28O2 compound is perfectly conducted without any impurities. Additionally, the little deviations are noticed on the bond lengths and bond angles, confirming that the strong intra-molecular charge transfers appear in the due to the presence of the electron engagements and conjugative effects (bond weakening). Besides, the intermolecular C-H⋯O distance presents the interaction between the methylcyclobutyl C-H group and oxygen atom in the ethanone group. At the same time, the absorption wavelength (λmax) appears at 292 nm and interval 297-269 nm in the solvent of chloroform and THF as a consequence of the presence of effective π-π(∗) conjugated segments in the molecule studied. Besides, optical band gap energy of 3.22/3.25 eV (chloroform/THF), verifies the existence of the strong electronic donating groups in the structure. As for the quantum chemical computations, the determination of the optimized molecular structures, vibrational frequencies including infrared intensities, vibrational wavenumbers, thermodynamic properties, atomic charges, electronic transitions, dipole moment (charge distribution), optical band gap energy, (1)H and (13)C NMR chemical shifts are conducted using density functional theory/Becke-3-Lee-Yang-Parr (DFT/B3LYP) method with the standard 6-311++G(2d,2p) level of theory. The results obtained show that the strong intra-molecular charge transfer (ICT) appears between the donor and acceptor in the title compound due to the existence of the strong electronic donating groups and effective π-π(∗) conjugated segments with high electronic donor ability for the electrophilic attack (intermolecular interactions). Additionally, the presence of the non-uniform charge distributions (polar behavior) on the various atoms makes the title compound be useful to bond metallically.
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Affiliation(s)
- M Koca
- Adiyaman University, Department of Chemistry, Faculty of Arts and Science, Adıyaman 02040, Turkey
| | - C Arici
- Hacettepe University, Department of Engineering Physics, Ankara 06800, Turkey
| | - H Muglu
- Kastamonu University, Department of Chemistry, Faculty of Arts and Science, Kastamonu 37100, Turkey
| | - C D Vurdu
- Kastamonu University, Department of Biomedical Engineering, Faculty of Engineering and Architecture, Kastamonu 37100, Turkey
| | - F Kandemirli
- Kastamonu University, Department of Biomedical Engineering, Faculty of Engineering and Architecture, Kastamonu 37100, Turkey
| | - Y Zalaoglu
- Osmaniye Korkut Ata University, Department of Physics, Osmaniye 80000, Turkey.
| | - G Yildirim
- Abant Izzet Baysal University, Department of Mechanical Engineering, Bolu 14280, Turkey
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28
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Elshaarawy RF, Janiak C. Ionic liquid-supported chiral saldach with tunable hydrogen bonding: synthesis, metalation with Fe(III) and in vitro antimicrobial susceptibility. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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29
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Impact of metal cation complexation and protonation on tautomeric and resonance forms of the oxaalkyl Schiff bases derived from 5-substituted salicylaldehyde and 2-hydroxy-1-naphthlaldehyde. Struct Chem 2014. [DOI: 10.1007/s11224-014-0447-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Intramolecular hydrogen bond in the push–pull CF3-aminoenones: DFT and FTIR study, NBO analysis. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.061] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Albayrak Ç, Kaştaş G, Odabaşoğlu M, Büyükgüngör O. Existence of a resonance hybrid structure as a result of proton tautomerism in (±)-(E)-4-bromo-2-[(2,3-dihydroxypropylimino) methyl]phenol racemate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 120:201-207. [PMID: 24184622 DOI: 10.1016/j.saa.2013.10.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/30/2013] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
o-Hydroxy Schiff bases have two tautomers known as phenol-imine and keto-amine forms. In the present work, the tautomerism in (E)-4-Bromo-2-[(2,3-dihydroxypropylimino)methyl]phenol compound has been investigated by experimental (XRD, FT-IR and UV-vis) and computational (DFT and TD-DFT) methods. The X-ray diffraction (XRD) study reveals that the title compound favors a resonance hybrid structure of phenol-imine and keto-amine forms in the solid state rather than having these forms separately or jointly. Experimental UV-vis study of proton transfer process in solvent media (Benzene, DMSO and EtOH) shows the preference of phenol-imine form in benzene while both phenol-imine and keto-amine characteristics are present in EtOH and DMSO.
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Affiliation(s)
- Çiğdem Albayrak
- Sinop University, Faculty of Arts and Sciences, Department of Chemistry, 57000 Sinop, Turkey.
| | - Gökhan Kaştaş
- Ondokuz Mayıs University, Civil Aviation College, Samsun, Turkey
| | - Mustafa Odabaşoğlu
- Pamukkale University, Chemical Technology Program, 20070 Kınıklı-Denizli, Turkey
| | - Orhan Büyükgüngör
- Ondokuz Mayıs University, Faculty of Arts and Sciences, Department of Physics, 55139 Kurupelit-Samsun, Turkey
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32
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Karaboga F, Soykan U, Dogruer M, Ozturk B, Yildirim G, Cetin S, Terzioglu C. Experimental and theoretical approaches for identification of p-benzophenoneoxycarbonylphenyl acrylate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 113:80-91. [PMID: 23714185 DOI: 10.1016/j.saa.2013.04.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 04/11/2013] [Indexed: 06/02/2023]
Abstract
The aim of this multidisciplinary study is to characterize a title compound, p-benzophenoneoxycarbonylphenyl acrylate (BPOCPA) synthesized by condensation reaction of p-acryloyloxybenzoyl chloride (ABC) with 4-hydroxybenzophenone (HBP) by means of experimental and theoretical evidences. The spectroscopic properties of the compound are experimentally examined by Fourier transformation-infrared (FTIR) spectra (in the region 400-4000 cm(-1)) and nuclear magnetic resonance (NMR) chemical shifts (with a frequency of 400 MHz). For the theoretical studies, the optimized molecular structures, vibrational frequencies including infrared intensities and Raman activities, corresponding vibrational spectra interpreted with the aid of normal coordinate analysis based on scaled density functional force field, atomic charges, thermodynamic properties, (1)H and (13)C NMR chemical shifts, JCH and JCC coupling constants belonging to the BPOCPA compound are analyzed in the ground state by the way of the density functional theory (B3LYP) with the standard 6-311++G(d,p) level of theory for the first time. All the results obtained show that the calculated vibrational frequencies and chemical shifts are observed to be in good agreement with the available experimental findings. According to the comparison between experimental results and theoretical data, the calculation level chosen plays an important role in understanding of dynamics of the title compound studied in this work. The self-consistent field (SCF) energy of the molecule in six different solvent media is also analyzed at the same basis set by applying both the Onsager and Polarizable Continuum Model (PCM). It is found that the SCF energies deduced from the methods reduce with the enhancement of the solvent polarity as a consequence of the increment in the stability of the compound studied. Besides, the changes of the PCM calculations are found to be higher than those of the Onsager ones, confirming that the former method displays a more stable structure than latter model.
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Affiliation(s)
- F Karaboga
- Abant Izzet Baysal University, Department of Physics, Bolu 14280, Turkey.
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33
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Synthesis, characterization, crystal structure and theoretical approach of (E)-2-[(3-carboxylphenylimino)methylene]phenoxyacetic acid. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.10.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Kazemi SH, Eshtiagh-Hosseini H, Mirzaei M. Computational study of the intramolecular proton transfer reactions of dipicolinic acid (pyridine-2,6-dicarboxylic acid) and its dimers. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.10.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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35
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Albayrak Ç, Kaştaş G, Odabaşoğlu M, Frank R. Survey of conformational isomerism in (E)-2-[(4-bromophenylimino)methyl]-5-(diethylamino)phenol compound from structural and thermochemical points of view. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:664-669. [PMID: 22591794 DOI: 10.1016/j.saa.2012.04.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 04/14/2012] [Accepted: 04/18/2012] [Indexed: 05/31/2023]
Abstract
In this study, (E)-2-[(4-bromophenylimino)methyl]-5-(diethylamino)phenol compound was investigated by mainly focusing on conformational isomerism. For this purpose, molecular structure and spectroscopic properties of the compound were experimentally characterized by X-ray diffraction, FT-IR and UV-Vis spectroscopic techniques, and computationally by DFT method. The X-ray diffraction analysis of the compound shows the formation of two conformers (anti and eclipsed) related to the ethyl groups of the compound. The two conformers are connected to each other by non-covalent C-H⋯Br and C-H⋯π interactions. The combination of these interactions is resulted in fused R(2)(2)(10) and R(2)(4)(20) synthons which are responsible for the tape structure of crystal packing arrangement. The X-ray diffraction and FT-IR analyses also reveal the existence of enol form in the solid state. From thermochemical point of view, the computational investigation of isomerism includes three studies: the calculation of (a) the rate constants for transmission from anti or eclipsed conformations to transition state by using Eyring equation, (b) the activation energy needed for isomerism by using Arrhenius equation, (c) the equilibrium constant from anti conformer to eclipsed conformer by using the equation including the change in Gibbs free energy. The dependence of tautomerism on solvent types was studied on the basis of UV-Vis spectra recorded in different organic solvents. The results showed that the compound exists in enol form in all solvents except ethyl alcohol.
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Affiliation(s)
- Çiğdem Albayrak
- Sinop University, Faculty of Education, Department of Science Education, 57000 Sinop, Turkey.
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36
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Kaştaş G, Albayrak C, Odabaşoğlu M, Frank R. Single stranded helical chains of C-H⋯π interactions further connected by halogen-halogen interactions of type I to construct supramolecular structure of (E)-5-(diethylamino)-2-[(4-iodophenylimino)methyl]phenol compound. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 94:200-204. [PMID: 22516124 DOI: 10.1016/j.saa.2012.03.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 03/08/2012] [Accepted: 03/22/2012] [Indexed: 05/31/2023]
Abstract
In this study, (E)-5-(diethylamino)-2-[(4-iodophenylimino)methyl]phenol compound was investigated from the point of stacking interactions assembling the supramolecular network, conformational isomerism and tautomerism. For this purpose, X-ray diffraction, FT-IR and UV/Vis spectroscopic techniques were used, giving the following structural and spectroscopic properties of the compound: The title compound has two conformers (anti and eclipsed) in the crystal structure resulting from rotation about C-N single bond of ethyl group. Both conformers prefer enol form in the solid state, adopting E configuration about the CN double bond. The supramolecular architecture of the compound is constructed by two non-covalent interactions as C-H⋯π and halogen-halogen interactions. The repetition of C-H⋯π interactions is resulted in a single-stranded helical structure. The helical structures are further connected by C-I⋯I-C interactions of Type I to construct the two dimensional supramolecular network defined as (6,3)-net in Wells nomenclature. The title compound adopts both enol and keto forms in EtOH (a polar and protic solvent) while enol form is preferred in the solid state.
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Affiliation(s)
- Gökhan Kaştaş
- Ondokuz Mayıs University, Faculty of Arts and Sciences, Department of Physics, 55139, Samsun, Turkey.
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37
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Investigating the prototropic tautomerism in (E)-2-[(4-fluorophenyl)iminomethyl]-5-methoxyphenol compound for solid state and solvent media by experimental and quantum computational tools. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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38
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Subashchandrabose S, Saleem H, Erdogdu Y, Dereli Ö, Thanikachalam V, Jayabharathi J. Structural, vibrational and hyperpolarizability calculation of (E)-2-(2-hydroxybenzylideneamino)-3-methylbutanoic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:231-241. [PMID: 22070995 DOI: 10.1016/j.saa.2011.10.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 09/28/2011] [Accepted: 10/14/2011] [Indexed: 05/31/2023]
Abstract
The (E)-2-(2-hydroxybenzylideneamino)-3-methylbutanoic acid (E)-2HBAMBA was synthesized. The FT-IR, FT-Raman and UV-vis spectra have been recorded and characterized. Theoretical wavenumbers along with IR and Raman intensities were calculated using B3LYP/6-31G(d,p) level and total energy distribution (TED) of the various normal mode of vibrations were also studied. The conformational analysis was performed for a stable conformer by selecting the dihedral angles and the optimized bond parameters were calculated for the stable structure. Effect of intramolecular interactions is calculated by changing the orientation of hydroxyl hydrogen. To know the charge transfer while changing the hydroxyl group hydrogen orientation, the NBO analysis was performed. Using the same level of calculation, the electronic charge transfers were calculated and compared.
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Affiliation(s)
- S Subashchandrabose
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608002, India
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39
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Albayrak C, Odabaşoğlu M, Ozek A, Büyükgüngör O. Synthesis, spectroscopic characterizations and quantum chemical computational studies of (Z)-4-[(E)-(4-fluorophenyl)diazenyl]-6-[(3-hydroxypropylamino)methylene]-2-methoxycyclohexa-2,4-dienone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 85:85-91. [PMID: 22001007 DOI: 10.1016/j.saa.2011.09.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 09/07/2011] [Accepted: 09/08/2011] [Indexed: 05/31/2023]
Abstract
In this study, the molecular structure and spectroscopic properties of the title compound were characterized by X-ray diffraction, FT-IR and UV-vis spectroscopies. These properties were also investigated using DFT method. The most convenient conformation of title compound was firstly determined. The geometry optimizations in gas phase and solvent media were performed by DFT methods with B3LYP adding 6-31G(d) basis set. The differences between crystal and computational structures are due to crystal packing in which hydrogen bonds play an important role. UV-vis spectra were recorded in different organic solvents. The results show that title compound exists in both keto and enol forms in DMSO, EtOH but it tends to shift towards enol form in benzene. The polar solvents facilitate the proton transfer by decreasing the activation energy needed for Transition State. The formation of both keto and enol forms in DMSO and EtOH is due to decrease in the activation energy. TD-DFT calculations starting from optimized geometry were carried out in both gas and solution phases to calculate excitation energies of the title compound. The non-linear optical properties were computed at the theory level and the title compound showed a good second order non-linear optical property. In addition, thermodynamic properties were obtained in the range of 100-500K.
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Affiliation(s)
- Ciğdem Albayrak
- Faculty of Education, Sinop University, 57100 Sinop, Turkey.
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40
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Albayrak Ç, Kaştaş G, Odabaşoğlu M, Frank R. Probing the compound (E)-5-(diethylamino)-2-[(4-methylphenylimino)methyl]phenol mainly from the point of tautomerism in solvent media and the solid state by experimental and computational methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:72-78. [PMID: 21724455 DOI: 10.1016/j.saa.2011.05.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/02/2011] [Accepted: 05/17/2011] [Indexed: 05/31/2023]
Abstract
In this study, the molecular structure and spectroscopic properties of (E)-5-(diethylamino)-2-[(4-methylphenylimino)methyl]phenol were characterized experimentally by X-ray diffraction, FT-IR and UV-vis spectroscopic techniques and computationally by DFT method. It is concluded on the basis of X-ray diffraction and FT-IR analyses that the title compound exists in enol form in the solid state. UV-vis spectra of the title compound were recorded in different organic solvents to investigate the dependence of tautomerism on solvent types. The tautomerism-solvent relation was also studied by computational methods to have more insight on structural properties. The geometry optimization of the title compound in gas phase was performed by using DFT (B3LYP) method with 6-311G(d,p) basis set. The geometry optimizations in solvent media were carried out at the same theory level by the polarizable continuum model (PCM). In the calculation of excitation energies, TD-DFT calculations were carried out in both gas and solution phases. The computational investigation of non-linear optical properties indicates that the title compound has a good second order nonlinear optical property. The thermodynamic properties were obtained in the range of 100-500 K.
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Affiliation(s)
- Çiğdem Albayrak
- Faculty of Education, Department of Science Education, Sinop University, 57000 Sinop, Turkey.
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41
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Spectroscopic, molecular structure characterizations and quantum chemical computational studies of (E)-5-(diethylamino)-2-[(2-fluorophenylimino)methyl]phenol. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.09.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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42
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Tanak H, Bingöl Alpaslan Y, Yavuz M, Ağar E, Erşahin F, Büyükgüngör O. 2-[(2,4-Dimethyl-phen-yl)imino-meth-yl]-3,5-dimethoxy-phenol. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o1572. [PMID: 21582851 PMCID: PMC2969358 DOI: 10.1107/s1600536809021278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2009] [Accepted: 06/04/2009] [Indexed: 11/11/2022]
Abstract
X-ray analysis reveals that the title Schiff base compound, C17H19NO3, possesses both OH and NH tautomeric character in its molecular structure. The occupancies of the enol and keto tautomers are 0.62 (3) and 0.38 (3), respectively. The presence of the minor keto form could not be confirmed from the IR spectrum. The molecule is approximately planar, the dihedral angle between the planes of the two aromatic rings being 6.97 (8)°. The molecular structure of the major component is stabilized by an intramolecular O—H⋯N hydrogen bond, which generates an S(6) ring motif (N—H⋯O hydrogen bond in the minor component).
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