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AuthorAlQaradawi, Siham Y.
AuthorMostafa, Adel
AuthorBengali, A.A.
Available date2017-02-16T11:21:16Z
Publication Date2016-02-15
Publication NameJournal of Molecular Structure
Identifierhttp://dx.doi.org/10.1016/j.molstruc.2015.10.100
CitationSiham Y. AlQaradawi, Adel Mostafa, A.A. Bengali, Charge-transfer complexes formed in the reaction of 2-amino-4-ethylpyridine with π-electron acceptors, Journal of Molecular Structure, Volume 1106, 15 February 2016, Pages 10-18
ISSN00222860
URIhttp://www.sciencedirect.com/science/article/pii/S0022286015304002
URIhttp://hdl.handle.net/10576/5267
AbstractMolecular charge-transfer complexes (CT) of electron donor 2-amino-4-ethylpyridine (2A4EPy) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TBCHD) have been studied spectrophotometrically in chloroform at 25 °C. These were investigated through electronic, infrared, mass spectra and thermal measurements as well as elemental analysis. All formed complexes exhibit well resolved charge-transfer bands in the regions where neither donor nor acceptors have any absorption. The obtained results show that the formed solid CT-complexes have the structures [(2A4EPy)(TCNE)2], [(2A4EPy)2(DDQ)] and [(2A4EPy)2(TBCHD)] for 2-amino-4-ethylpyridine in full agreement with the known reaction stoichiometries in solution as well as the elemental measurements. The formation constant KCT, molar extinction coefficient εC.T, free energy change ΔG0, CT energy ECT, ionization potential Ip and oscillator strength ƒ have been calculated for these three CT-complexes.
Languageen
PublisherElsevier
SubjectTCNE
DDQ
TBCHD
Spectra
Thermal
TitleCharge-transfer complexes formed in the reaction of 2-amino-4-ethylpyridine with π-electron acceptors
TypeArticle
Pagination10-18
Volume Number1106


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