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SPECTROSCOPIC INVESTIGATION OF CHARGE-TRANSFER COMPLEXES OF OSAZONE INTERMEDIATES PREPARED FROM CERTAIN MONOSACCHARIDES .2.
Faculty
Pharmacy
Year:
1991
Type of Publication:
Article
Pages:
291-305
Authors:
ELADL, SM, ABULKHEIR, A, BELAL, S, AYAD, M
Journal:
SPECTROSCOPY LETTERS MARCEL DEKKER INC
Volume:
24
Research Area:
Spectroscopy
ISSN
ISI:A1991EZ35000010
Keywords :
UV/VIS, IR, H-1, C-13 - NMR, MS, ESR, MICROANALYSIS, OSAZONES, MONOSACCHARIDES, IODINE, CHOLRANIL, TCNE, AND CHARGE TRANSFER COMPLEXES (CTC)
Abstract:
Monosaccharide osazones are utilized in the spectrophotometric determination of their parent compounds through charge transfer complexes (CTC) formation with three-electron acceptor reagents. These acceptors indlude iodine (as -delta-acceptor) and chloranil (tetrachloro P-benzoquinone) \& TCNE (tetracyano ethylene) as PI-acceptors. The presence of two phenyl-hydrazone moities in the osazone molecule imparts electron-donating properties toward electron-accepting reagents, yielding spectro-photometrically measurable complexes. However, the reaction of osazone intermediates with TCNE reagent gave tricyanovinyl derivative rather than CTC formation. The above complexes together with their corresponding intermediates were subjected to structure elucidation studies to confirm the results and conclusions obtained. These studies include IR, Raman spectra, H-1, C-13-NMR, MS, ESR (electron spin resonance spectra) and microanalysis.
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