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dc.contributor.authorChen, Hsin-Tsungen_US
dc.contributor.authorChang, Jee-Gongen_US
dc.contributor.authorMusaev, Djamaladdin G.en_US
dc.contributor.authorLin, M. C.en_US
dc.date.accessioned2014-12-08T15:11:10Z-
dc.date.available2014-12-08T15:11:10Z-
dc.date.issued2008-07-24en_US
dc.identifier.issn1089-5639en_US
dc.identifier.urihttp://dx.doi.org/10.1021/jp8019733en_US
dc.identifier.urihttp://hdl.handle.net/11536/8557-
dc.description.abstractThe mechanisms and kinetics of unimolecular decomposition of succinic acid and its anhydride have been studied at the G2M(CC2) and microcanonical RRKM levels of theory. It was shown that the ZsgsZ conformer of succinic acid, with the Z-acid form and the gauche conformation around the central C-C bond, is its most stable conformer, whereas the lowest energy conformer with the E-acid form, ECGsZ, is only 3.1 kcal/mol higher in energy than the ZsgsZ. Three primary decomposition channels of succinic acid producing H2O + succinic anhydride with a barrier of 51.0 kcal/mol, H2O + OCC2H3COOH with a barrier of 75.7 kcal/mol and CO2 + C2H5COOH with a barrier of 71.9 kcal/mol were predicted. The dehydration process starting from the ECGCZ-conformer is found to be dominant, whereas the decarboxylation reaction starting from the ZsgsZ-conformer is only slightly less favorable. It was shown that the decomposition of succinic anhydride occurs via a concerted fragmentation mechanism (with a 69.6 kcal/mol barrier), leading to formation of CO + CO2 + C2H4 products. On the basis of the calculated potential energy surfaces of these reactions, the rate constants for unimolecular decomposition of succinic acid and its anhydride were predicted. In addition, the predicted rate constants for the unimolecular decomposition Of C2H5COOH by decarboxylation (giving C2H6 + CO2) and dehydration (giving H3CCHCO + H2O) are in good agreement with available experimental data.en_US
dc.language.isoen_USen_US
dc.titleComputational study on kinetics and mechanisms of unimolecular decomposition of succinic acid and its anhydrideen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/jp8019733en_US
dc.identifier.journalJOURNAL OF PHYSICAL CHEMISTRY Aen_US
dc.citation.volume112en_US
dc.citation.issue29en_US
dc.citation.spage6621en_US
dc.citation.epage6629en_US
dc.contributor.department應用化學系分子科學碩博班zh_TW
dc.contributor.departmentInstitute of Molecular scienceen_US
dc.identifier.wosnumberWOS:000257723900017-
dc.citation.woscount2-
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