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dc.description.abstractThe possible role of Electron Donor Acceptor complexes or interactions in controlling and modifying the electron or charge flow, as a bridge between molecular components in biological systems is a fascinating area of research. In almost all such studies with quinones as acceptors the model compound has been Chloranil, which is tetrachloro-1,4 benzoquinone. This is too strong an acceptor and insoluble in water. But systems in vivo are often reversible and involve aqueous and ionising media. newline newlineIn the first part of the investigation 2,5 dichloro, 3-6-dimethoxy p-benzoquinone CMBQ is the quinone chosen. For study with its accepting capacity moderated by two, methoxy groups in place of chlorines. It is soluble in water. Its complexing ability has been studied first in carbon tetrachloride with the aromatic hydrocarbons hexamethylbenzene, fluorene, naphthalene, durene and acenapthene. The interaction is found to be very weak even with the fairly strong donor HMB. With all the other donors contact pair interaction seems to prevail and intensity borrowing from the donor excited state appears to contribute to the increased absorption in the spectra. Even carbontetrachloride is shown to compete with this quinine as an acceptor and this has been dramatically demonstrated in the specific solvent effect that has, brought forth some special features in the results. newline newlineIn spite of this moderation in its electron accepting ability this quinone is found to have strong interaction with aliphatic amines which act as n-donors. This aspect forms the subject of study itr the second part of this dissertation. N-butylamine and other amines aire found to, interact with CMBQ in water solution giving rise to changes in .the absorption spectra with time. Beyond the stage of outer complex formation, an ionic complex leads on further to a nucleophilic substitution reaction showing up a 3,6-diamino substituted product. The kinetics has been investigated.en_US
dc.format.extenti-x, 254 p.en_US
dc.relation122 referencesen_US
dc.titleElectronic absorption spectra studies on donor acceptor interactions weak and strongen_US
dc.creator.researcherRamesh, Sen_US
dc.description.noteBibliography includeden_US
dc.contributor.guideKarthikeyan, Gen_US
dc.publisher.universityThe Gandhigram Rural Instituteen_US
dc.publisher.institutionDepartment of Chemistryen_US 1988en_US
Appears in Departments:Department of Chemistry

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04_acknwolegements.pdf95.43 kBAdobe PDFView/Open
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06_list of abbreviation.pdf64.89 kBAdobe PDFView/Open
07_abstract.pdf65.13 kBAdobe PDFView/Open
08_list of table figures.pdf68.6 kBAdobe PDFView/Open
09_chapter 1.pdf264.36 kBAdobe PDFView/Open
10_chapter 2.pdf464.05 kBAdobe PDFView/Open
11_chapter 3.pdf215.32 kBAdobe PDFView/Open
12_chapter 4.pdf80.03 kBAdobe PDFView/Open
13_chapter 5.pdf538.27 kBAdobe PDFView/Open
14_bibliography.pdf133.06 kBAdobe PDFView/Open

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