Spectroscopic and Thermal Characterization of Charge-TransferComplexes Formed In the Reaction of 2-Amino-6-Ethylpyridine with Π-Electron Acceptors
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2015, Vol 5, Issue 1
Abstract
The spectrophotometric characteristics of the solid charge-transfer molecular complexes (CT) formed in the reaction of the electron donor 2-amino-6-ethylpyridine (2A6EPy) with the 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 in chloroform at 25 0C. These were investigated through electronic, infrared, mass spectra and thermal studies as well as elemental analysis. The results show that the formed solid CT- complexes have the formulas [(2A6EPy)(TCNE)2], [(2A6EPy)2(DDQ)], [(2A6EPy)4(TBCHD)] for 2-amino-6-ethylpyridine in full agreement with the known reaction stoichiometries in solution as well as the elemental measurements. The formation constant kCT, molar extinction coefficient εCT, free energy change ∆G 0 and CT energy ECT have been calculated for the CT- complexes [(2A6EPy)(TCNE)2], [(2A6EPy)2(DDQ)].
Authors and Affiliations
Adel Mostafa , A. A. Bengali , Siham Y. AlQaradawi
Keywords
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