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Ahmed SM, Shaaban IA, El-Mossalamy EH, Mohamed TA. Synthesis, Conformational Analysis, Infrared, Raman and UV-Visible Spectra of Novel Schiff Bases compiled with DFT Calculations. Comb Chem High Throughput Screen 2020; 23:568-586. [DOI: 10.2174/1386207323666200127161207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/01/2019] [Accepted: 11/14/2019] [Indexed: 11/22/2022]
Abstract
Objective:
Two novel Schiff bases named, 2-((2-Hydroxybenzylidene)amino)-4,5,6,7-
tetrahydrobenzo[b] thiophene-3-carbonitrile (BESB1) and 2-((Furan-2-ylmethylene)amino)-4,5,6,
7-tetrahydro-benzo[b]thiophene-3-carbonitrile (BESB2) were synthesized.
Methods:
The structures were characterized based on CHN elemental analysis, mid-infrared (400–
4000 cm-1), Raman (100-4000 cm-1), 1H NMR, mass and UV-Vis spectroscopic measurements. In
addition, quantum mechanical calculations using DFT-B3LYP method at 6-31G(d) basis set were
carried out for both Schiff bases. Initially, we have carried out complete geometry optimizations
followed by frequency calculations for the proposed conformational isomers; BESB1 (A–E) and
BESB2 (F–J) based on the orientations of both CN and OH groups against the azomethine lonepair
(NLP) in addition to the 3D assumption.
Results:
The computational outcomes favor conformer A for BESB1 in which the C≡N and OH
moieties are cis towards the NLP while conformer G is preferred for BESB2 (the C≡N/furan-O are
cis/trans towards the NLP) which was found consistent with the results of relaxed potential energy
surface scan. Aided by normal coordinate analysis of the Cartesian coordinate displacements, we
have suggested reliable vibrational assignments for all observed IR and Raman bands. Moreover,
the electronic absorption spectra for the favored conformers were predicted in DMSO solution
using TD-B3LYP/6-31G(d) calculations. Similarly, the 1H NMR chemical shifts were also
estimated using GIAO approach implementing PCM including solvent effects (DMSO-d6).
Conclusion:
Proper interpretations of the observed electronic transition, chemical shifts, IR and
Raman bands were presented in this study.
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Affiliation(s)
- Samy M. Ahmed
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Ibrahim A. Shaaban
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, Egypt
| | | | - Tarek A. Mohamed
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, Egypt
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Nobre SM, Cavalheiro VM, Duarte LS. Synthesis of brominated bisamides and their application to the suzuki coupling. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
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Altarawneh SS, Jazzazi TMA, Ababneh TS, Al Shboul TMA, Al Jaafreh IY. Synthesis, structures, and density functional theory computational study of thiophene-containing and fluorodecorated imine-linked polymers. J Appl Polym Sci 2017. [DOI: 10.1002/app.44331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Suha S. Altarawneh
- Department of Chemistry and Chemical Technology; Tafila Technical University; Tafila Jordan
| | | | - Taher S. Ababneh
- Department of Chemistry and Chemical Technology; Tafila Technical University; Tafila Jordan
| | - Tareq M. A. Al Shboul
- Department of Chemistry and Chemical Technology; Tafila Technical University; Tafila Jordan
| | - Ibtesam Y. Al Jaafreh
- Department of Chemistry and Chemical Technology; Tafila Technical University; Tafila Jordan
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Wen Q, Zhou TY, Zhao QL, Fu J, Ma Z, Zhao X. A Triptycene-Based Microporous Organic Polymer Bearing Tridentate Ligands and Its Application in Suzuki-Miyaura Cross-Coupling Reaction. Macromol Rapid Commun 2015; 36:413-8. [DOI: 10.1002/marc.201400593] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 11/25/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Qiang Wen
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Tian-You Zhou
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Qiao-Ling Zhao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jie Fu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zhi Ma
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Xin Zhao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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Immobilized Pd nanoparticles on Tris-modified SiO2: Synthesis, characterization, and catalytic activity in Heck cross-coupling reactions. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60109-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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