II. “Spectroscopic Investigation of Charge Transfer Complexes of Osazone Intermediates Prepared From certain monosaccharides”
作者:
SobhyM. El Adl,
Afaf Abul-Kheir,
Saied Belal,
Magda Ayad,
期刊:
Spectroscopy Letters
(Taylor Available online 1991)
卷期:
Volume 24,
issue 2
页码: 291-305
ISSN:0038-7010
年代: 1991
DOI:10.1080/00387019108020657
出版商: Taylor & Francis Group
关键词: Uv/Vis;IR;H1;C13- NMR;MS;ESR;microanalysis;osazones;monosaccharides;iodine;cholranil;TCNE;charge transfer complexes (CTC)
数据来源: Taylor
摘要:
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 -π-acceptor) and chloranil (tetrachloro P-benzoquinone) & TCNE (tetracyano ethylene) as π-acceptors. The presence of two phenylhydrazone moieties in the osazone molecule imparts electron-donating properties toward electron-accepting reagents, yielding spectrophotometrically 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, H1, C13-NMR, MS, ESR (electron spin resonance spectra) and microanalysis.
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