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dc.contributor.advisorBartlett, Paul D.
dc.contributor.authorWu, Chengjiuen_US
dc.date.accessioned2019-10-11T15:10:02Z
dc.date.available2019-10-11T15:10:02Z
dc.date.created1982en_US
dc.date.issued1982en_US
dc.identifieraleph-441724en_US
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/31779
dc.description.abstractThe deuteration of isodicyclopentadiene I has been studied. Monodeuterated I can be obtained by reacting methanol-d(,1) with lithium isodicyclopentadienide 15 in tetrahydrofuran at -78(DEGREES); the deuterium atom is incorporated into the ring largely at position 4(alpha) (endo), with lesser amounts of 4(beta) (exo) and at 3 and 5. The positions of deuterium were determined by ('1)H, ('2)H and ('13)C NMR on the dienes and on their adducts with dimethyl acetylenedicarboxylate (DMAD) and maleic anhydride, and using lanthanide induced shifts in the ('1)H spectra of these adducts. At 0(DEGREES) in ether, the use of H(,2)O or D(,2)O with 15 leads to as much as 62% of the previously undetected III-H or III-D, the latter being deuterated at the ring junction. Isomer III, which has been isolated and characterized, readily isomerizes to I at 100(DEGREES). Deuterium is located mainly at the 3 and 5 positions of I produced from III-D. By following the course of the isomerization of III-H and III-D, and the redistribution of deuterium in monodeuterated I, the kinetics of the 1,5-sigmatropic hydrogen shifts and the kinetic isotope effects in the isodicyclopentadiene isomers were studied. At 100(DEGREES), from III to II, II to I, and I to II, the rate constants (k(,H)) are: 5.84 x 10('-3); > 5.8 x 10('-2); and 1.0 x 10('-4), s('-1), respectively; the isotope effects (k(,H)/k(,D)) are: 3.3, 9.4, and 6.5, respectively. Some reactions of III were studied, in relation to those of I. III is less reactive than I toward dienophiles such as maleic anhydride, but is more reactive than I toward triplet oxygen. Reaction of tetracyanoethylene with III first forms the (2 + 4) cycloadduct 37, which then slowly rearranges to the (2 + 2) cycloadduct 38.
dc.format.extentxiii, 191 leaves, bound : illustrationsen_US
dc.format.mediumFormat: Printen_US
dc.language.isoengen_US
dc.relation.ispartofTexas Christian University dissertationen_US
dc.relation.ispartofAS38.W9en_US
dc.subject.lcshIsodicyclopentadienesen_US
dc.titleThe 1,5-sigmatropic hydrogen shifts and some other reactions of isodicyclopentadienesen_US
dc.typeTexten_US
etd.degree.departmentDepartment of Chemistry
etd.degree.levelDoctoral
local.collegeCollege of Science and Engineering
local.departmentChemistry and Biochemistry
local.academicunitDepartment of Chemistry
dc.type.genreDissertation
local.subjectareaChemistry and Biochemistry
dc.identifier.callnumberMain Stacks: AS38 .W9 (Regular Loan)
dc.identifier.callnumberSpecial Collections: AS38 .W9 (Non-Circulating)
etd.degree.nameDoctor of Philosophy
etd.degree.grantorTexas Christian University


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