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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

A stereospecific synthesis of a cycloeudesmol diastereois[o]mer / by Pi-Chang Chen

Chen, Pi-Chang 08 1900 (has links)
No description available.
22

The photochemistry of trans-2-(p-cyanophenyl)-trans-3-phenyl-1-benzoylcyclopropane

McBride, Edward Francis, January 1966 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1966. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
23

Carbonium ion reactions of substituted cyclopropylcarbinyl systems

Rubenstein, Kenneth Edward, January 1967 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1967. / Vita. Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
24

Relative shielding of cis and trans methyls of some substituted methylcyclopropanes II. Stereochemistry of the opening of cyclopropanols.

Bair, Thomas Irvin, January 1966 (has links)
Thesis (Ph. D.)--University of Wisconsin, 1966. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographies.
25

The study of highly strained cyclopropyl adamantane compounds with emphasis on their radical copolymerizations with oxygen

Schmidt, Justin Orvel January 1972 (has links)
The synthesis of a new type of highly strained cyclopropyl group between the two remaining bridgehead positions in 1,3-dimethyl- adamantane was accomplished by an internal coupling reaction involving the removal of two bromines with sodium-potassium alloy in ether. The product, 5,7-dimethyltetracyclo [3.3.1.1⁵⁷.0 ¹³] decane, commonly named 3,5-dimethyl-l,3-dehydroadamantane (DMDHA), formed a polymer on heating the pure material to a temperature above 90°C. The polymer's properties were studied by X-ray analysis and differential scanning calorimetry. The previously reported parent compound to DHDMA, tetracyclo-5 7 13 [3.3.1.1⁵⁷.0 ¹³] decane, commonly named 1,3-dehydroadamantane (DHA), was synthesized and studied to determine the properties of the cyclopropyl bond between the bridgehead carbons. Reactions with several stable free radicals and other known reagents with affinities for radicals indicated a very high degree of radical character present at the bridgehead positions. From kinetic studies of the reaction of DHA with molecular oxygen at approximately 1 atmosphere and 22°C, first order kinetic plots were obtained which yielded the rate constants of k = 15.0 x 10⁻⁵ sec⁻¹ in octane and 32.8 x 10⁻⁵ sec⁻¹ in xylene. Oxygen was absorbed to an extent slightly greater than one mole per mole of DHA. The reaction was without ambiguity shown to be of radical nature through the use of several free radical inhibitors to retard the reaction rate. The initiation mechanism of the DHA-oxygen copolymerization could not be determined with certainty. The spontaneous reaction was either initiated by oxygen radicals attacking the highly strained, highly p-orbital-charactered carbon atom from its unprotected back side or else by the internal bond of the cyclopropyl group spontaneously ring opening to form an adamantane diradical. In the latter case the radical formed would sometimes capture an oxygen before the equilibrium shifted back to the closed form. All that is known for certainty is that the 1,3-carbon bond in DHA is very highly strained and is either in equilibrium between an open and a closed form or else is at least very radical-like in nature. / Science, Faculty of / Chemistry, Department of / Graduate
26

Silylcyclopropanes as versatile synthetic intermediates/

Wells, Gregory James January 1984 (has links)
No description available.
27

Oxidative cleavage of cyclopropanes with thallic acetate /

South, Aubrey January 1967 (has links)
No description available.
28

Oxidative cleavage of cyclopropanes with mercuric acetate /

Robins, Richard Dean January 1968 (has links)
No description available.
29

Stereochemical studies of thietane 1,1-dioxide derivatives /

Freeman, John P. January 1970 (has links)
No description available.
30

A study of the cyclopropylcarbinyl cation bearing electron withdrawing substituents on the cyclopropane ring /

Merrill, Dwight January 1975 (has links)
No description available.

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