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Full-Text Articles in Physical Sciences and Mathematics
Quantitative Evaluation Of Substituent Effects On Stabilization Energies Of Strained And Unsaturated Molecules, Tyler Arthur Stevenson
Quantitative Evaluation Of Substituent Effects On Stabilization Energies Of Strained And Unsaturated Molecules, Tyler Arthur Stevenson
Theses
Thermodynamic stabilization energies are presented for a series of monosubstituted vinyl, cyclopropyl, ethynyl, and phenyl compounds. The energies are calculated using ab initio molecular orbital calculations at the 4-31G level, and also with published experimental heat of formation data. Correlation analyses are then attempted with the dual substituent parameter approach with the stabilization energies. The analyses are also attempted with a triple-parameter approach using Topsom's theoretically calculated X, F, and Ro constants. Among the findings are the facts that π-donating substituents correlate well, while π-accepting substituents do not. Indications of the relative sensitivities of hydrocarbon frameworks to substituent electrostatic and …
Synthesis Of Cyclobutenyl Ketals, Atef Z. Boulos
Synthesis Of Cyclobutenyl Ketals, Atef Z. Boulos
Theses
A series of dialkoxy derivatives of N,N'-di-tert-butyl-2-butylamino-3,3-dichloro-4-dichloromethylene cyclobutenyl carboxamidinum chloride, were prepared by dissolving either Na+ or K+ alkoxide in the appropriate alcohol, or by treatment with potassium hydroxide in the appropriate alcohols. Thus, the dimethoxy, diethoxy, di-isopropoxy, di-n-butoxy, di-tertbutoxy derivatives were obtained.