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Reaction pathways and transition states of the C-C and C-H bond cleavage in the aromatic pyrene molecule - A Density Functional study
Muntadar Abd Al-Barri Hussain Al-Yassiri (1)
, Muthana Shanshal (2,*) (1) Department of Chemistry, College of Science, University of Baghdad, Baghdad, 00964-01, Iraq
(2) Department of Chemistry, College of Science, University of Baghdad, Jadirriya, Baghdad, 00964-01, Iraq
(*) Corresponding Author
Received: 10 Jan 2015 | Accepted: 04 Apr 2015 | Published: 30 Sep 2015 | Issue Date: September 2015
Abstract
The activation and reaction energies of the C-C and C-H bonds cleavage in pyrene molecule are calculated applying the Density Functional Theory and 6-311G Gaussian basis. Different values for the energies result for the different bonds, depending on the location of the bond and the structure of the corresponding transition states. The C-C bond cleavage reactions include H atom migration, in many cases, leading to the formation of CH2 groups and H-C≡C- acetylenic fragments. The activation energy values of the C-C reactions are greater than 190.00 kcal/mol for all bonds, those for the C-H bonds are greater than 160.00 kcal/mol. The reaction energy values for the C-C bonds range between 56.497 to 191.503 kcal/mol. As for the C-H cleavage reactions the activation energies range from 163.535 to 165.116 kcal/mol, the reaction energies are nearly constant, 117.500kcal/mol. The geometries of the transition states and reaction products are discussed too.
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DOI: 10.5155/eurjchem.6.3.261-269.1239
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Funding information
University of Baghdad, Baghdad, 00964-01, Iraq
Citations
[1]. Muthana Abduljabbar Shanshal, Qhatan Adnan Yusuf
C-C and C-H bond cleavage reactions in the chrysene and perylene aromatic molecules: An ab-initio density functional theory study
European Journal of Chemistry 8(3), 288, 2017
DOI: 10.5155/eurjchem.8.3.288-292.1561
[2]. Muthana Abduljabbar Shanshal, Muntadhar Abdulbary Al-Yassiri, Qhatan Adnan Yusof
Reaction paths and transition states of the C-C and C-H bond cleavage in the aromatic anthracene and phenanthrene molecules
European Journal of Chemistry 7(2), 166, 2016
DOI: 10.5155/eurjchem.7.2.166-175.1364
[3]. Muthana Abduljabbar Shanshal, Qhatan Adnan Yusuf
C-C and C-H bond cleavage reactions in acenaphthylene aromatic molecule, an ab-initio density functional theory study
European Journal of Chemistry 10(4), 403, 2019
DOI: 10.5155/eurjchem.10.4.403-408.1889
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DOI Link: https://doi.org/10.5155/eurjchem.6.3.261-269.1239
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European Journal of Chemistry 2015, 6(3), 261-269 | doi: https://doi.org/10.5155/eurjchem.6.3.261-269.1239 | Get rights and content
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