期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 74, 期 1, 页码 180-187出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2009.06.004
关键词
2-Aminopyridine; 3-Aminopyridine; Chloranil; CT-complexes; DDQ; Picryl chloride; TCNE; Spectra
类别
The interactions of the electron donors 2-aminopyridine (2APY) and 3-aminopyridine (3APY) with the pi-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5.6-dicyano-p-benzoquinone (DDQ) 2-chloro-1,3,5-trinitrobenzene (picryl chloride, PC), and 2,3,5,6-tetrachloro-1,4-benzoquinone (chloranil) were studied spectrophotometrically in chloroform at room temperature. The electronic and infrared spectra of the formed molecular charge transfer (CT) complexes were recorded. Photometric titration showed that the stoichiometries of the reactions were fixed and depended on the nature of both the donor and the acceptor. The molecular structures of the CT-complexes were, however, independent of the position of the amino group on the pyridine ring and were formulated as [(APY)(TCNE)], [(APY)(DDQ)], [(APY)(PC)], and [(APY) (chloranil)]. The formation constants (K-CT). charge transfer energy (E-CT) and molar extinction coefficients (epsilon(CT)) of the formed CT-complexes were obtained. (C) 2009 Elsevier B.V. All rights reserved.
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