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II-UTILITY OF F-19 NMR-SPECTROSCOPY FOR INVESTIGATION OF CHARGE-TRANSFER COMPLEXES
Faculty
Not Specified
Year:
1994
Type of Publication:
Article
Pages:
2101-2103
Authors:
ELADL, S
DOI:
10.1016/0584-8539(93)E0008-K
Journal:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY PERGAMON-ELSEVIER SCIENCE LTD
Volume:
50
Research Area:
Spectroscopy
ISSN
ISI:A1994PL65200006
Keywords :
II-UTILITY , F-19 NMR-SPECTROSCOPY , INVESTIGATION , CHARGE-TRANSFER COMPLEXES
Abstract:
Fluorine and proton chemical shifts for the griscofulvin oxime-fluoranil complex are reported. H-1, F-19-NMR spectra prove the course of the charge transfer complex formation. Due to redistribution of the electron density, the protons of the donor are slightly shifted towards a lower field where deshielding has occurred. Signals of the F-19-NMR spectra of fluoranil complex showed a positive value for the upfield shift of the fluorine resonance due to a shielding effect. Fluoranil (tetrafluoro-2,5-cyclohexadiene-1,4-dione) has a high electron-accepting ability with respect to the functional groups containing heteroatoms. The complete qualitative and quantitative chemical characterization of the resulting complex has been studied.
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