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| Content Provider | Springer Nature Link |
|---|---|
| Author | Alizadeh, Nina Dehganikhah, Sadegh |
| Copyright Year | 2016 |
| Abstract | The charge-transfer complexes of dibenzo-18-crown-6(DB18C6) (L) with iodine, as a typical σ-acceptor, were studied spectrophotometrically in chloroform, dichloromethane and their 1:1 (v/v) mixture at 25.0 ± 0.1 °C. Spectral data, formation constants and the effect of the solvent have been determined. Spectral characteristics and formation constants are discussed in the terms of donor molecular structure and solvent polarity. The stoichiometry of the complexes was established to be 1:1. The formation constants (K $_{CT}$) of the complexes were determined. The complexes were isolated and characterized by FTIR and $^{1}$H-NMR spectroscopy. The observed time dependence of the charge-transfer band and subsequent formation of $$ {\text{I}}_{3}^{ - } $$ in solution were related to the slow transformation of the initial 1:1 L:I$_{2}$ outer complex to an inner electron donor–acceptor complex, followed by fast reaction of the inner complex with iodine to form a triiodide ion. The pseudo-first-order rate constants for the transformation process were evaluated in different solvent systems. |
| Starting Page | 42 |
| Ending Page | 51 |
| Page Count | 10 |
| File Format | |
| ISSN | 00959782 |
| Journal | Journal of Solution Chemistry |
| Volume Number | 45 |
| Issue Number | 1 |
| e-ISSN | 15728927 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2016-01-18 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Charge-transfer complex Iodine Dibenzo-18-crown-6(DB18C6) Kinetics Formation constant Spectrophotometry FTIR $^{1}$H-NMR Physical Chemistry Industrial Chemistry/Chemical Engineering Geochemistry Oceanography Inorganic Chemistry Condensed Matter Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biochemistry Molecular Biology Biophysics Physical and Theoretical Chemistry |
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