Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 284, Issue -, Pages 616-624Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2019.04.040
Keywords
TAM; TFQ; TBCHD; DDQ; Spectra
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The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 1,4,8,11-tetraazacyclotetradecane (TACTD) with the pi-electron acceptors 2,4,6-tetrafluoro-1,4-benzoquinone (TFQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TBCHD) have been investigated spectrophotometrically in chloroform at 25 degrees C. These were characterized through electronic and infrared spectra as well as elemental and thermal analysis. The obtained results showed that the formed solid CT-complexes have the formulas [(TACTD)(TFQ)(2)] and RTACTD)(DDQ)(2)] and RTACTD)(TBCHD)(2)] in full agreement with the known reaction stoichiometry in solution as well as the elemental measurements. The formation constant k(CT), molar extinction coefficient epsilon(CT), free energy change Delta G degrees, CT energy E-CT and the ionization potential Ip have been calculated for these CT-complexes. (C) 2019 Elsevier B.V. All rights reserved.
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