Synthesis and characterization of benzo-2,1,3-thiadiazole derivatives and their metal complexes

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dc.contributor.authorOkeh, Saturday Amedu
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorBoeré, René T.
dc.date.accessioned2014-11-20T19:51:42Z
dc.date.available2014-11-20T19:51:42Z
dc.date.issued2014
dc.degree.levelMastersen_US
dc.degree.levelMasters
dc.descriptionxxi, 147 leaves ; 29 cmen_US
dc.description.abstractThis thesis describes the synthesis and characterization of some 2,1,3-benzothiadiazole derivatives, specifically 2,1,3-benzothiadiazole-4,7-dicarbonitrile (DCBTD) and diethyl 2,1,3-benzothiadiazole-4,7-dicarboxylate (DEBTD). The crystal structures have been determined; also both compounds exhibit two sequential one-electron reductions in square-wave and cyclic voltammetry. Stable radical anions are detected by EPR spectroscopy. In the solid-state, DEBTD displays endo/endo, exo/exo and endo/exo conformational isomerism. Silver(I) complexes of DCBTD and DEBTD have been prepared with a number of anions (BF4, ClO4−, PF6−, and SbF6−) and their crystal structures are determined. All these complexes exist as coordination polymers, some of which are dry and others are solvates (benzene, water). DCBTD is found to coordinate through one or more nitrile and one or more ring N atoms. DEBTD exclusively forms bis chelate complexes using ring N and ester carbonyl O donors. Evidence from electrochemistry and ESI mass spectrometry indicates that these polymers break down on dissolving in CH3CN. Conversion of DEBTD into 2,1,3-benzothiadiazole-4,7-dicarboxylic acid, 2,3-diaminobenzene-1,4-dicarboxylic acid and salts thereof has been substantiated by crystal structure determinations.en_US
dc.identifier.urihttps://hdl.handle.net/10133/3605
dc.language.isoen_CAen_US
dc.proquest.subject0490en_US
dc.proquestyesYesen_US
dc.publisherLethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, 2014en_US
dc.publisher.departmentDepartment of Chemistry and Biochemistryen_US
dc.publisher.facultyArts and Scienceen_US
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en_US
dc.subject2,1,3-benzothiadiazole derivativesen_US
dc.subjectMetal organic frameworks (MOFs)en_US
dc.subjectHeterocyclic compoundsen_US
dc.subjectChelation chemistryen_US
dc.subjectOrganic synthesisen_US
dc.subjectChalcogensen_US
dc.subjectDissertations, Academicen_US
dc.titleSynthesis and characterization of benzo-2,1,3-thiadiazole derivatives and their metal complexesen_US
dc.typeThesisen_US
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