Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity

 

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dc.contributor.advisor Modro, Tom A en_ZA
dc.contributor.author Rijkmans, Bloys Peter en_ZA
dc.date.accessioned 2015-07-14T09:02:35Z
dc.date.available 2015-07-14T09:02:35Z
dc.date.issued 1981 en_ZA
dc.identifier.citation Rijkmans, B. 1981. Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/13518
dc.description Bibliography: p. 84-86. en_ZA
dc.description.abstract The acid catalysed hydrolysis of a number of ring alkyl substituted dimethyl N-aryl phosphoramidates, (MeO)2P(0)NHAr, has been studied by measuring the rates of hyd~olysis with the aid of a UV spectrophotometer. These rates have been correlated with the pKa values of the corresponding ani I inium iOhs and the slope of this reactivitybasicity relationship for phosphoramidate with ortho substituents (6 = 0~85) is found to differ from that for substrates with meta and para substituents (S = 0,36). Determination of the thermodynamic parameters indicates that the entropy of activation is approximately constant for the substrates studied and the strongly negative values ~ -I -I (~S = 155,4 - 17,5 J mole K ) are consistent with an A2 type mechanism. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Organic Chemistry en_ZA
dc.title Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Chemistry en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Rijkmans, B. P. (1981). <i>Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/13518 en_ZA
dc.identifier.chicagocitation Rijkmans, Bloys Peter. <i>"Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1981. http://hdl.handle.net/11427/13518 en_ZA
dc.identifier.vancouvercitation Rijkmans BP. Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1981 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13518 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Rijkmans, Bloys Peter AB - The acid catalysed hydrolysis of a number of ring alkyl substituted dimethyl N-aryl phosphoramidates, (MeO)2P(0)NHAr, has been studied by measuring the rates of hyd~olysis with the aid of a UV spectrophotometer. These rates have been correlated with the pKa values of the corresponding ani I inium iOhs and the slope of this reactivitybasicity relationship for phosphoramidate with ortho substituents (6 = 0~85) is found to differ from that for substrates with meta and para substituents (S = 0,36). Determination of the thermodynamic parameters indicates that the entropy of activation is approximately constant for the substrates studied and the strongly negative values ~ -I -I (~S = 155,4 - 17,5 J mole K ) are consistent with an A2 type mechanism. DA - 1981 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1981 T1 - Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity TI - Dimethyl N-Aryl phosphoramidates : structural effects on bonding and solvolytic reactivity UR - http://hdl.handle.net/11427/13518 ER - en_ZA


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