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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

Negative ion chemistry of boron and carbon compounds

Currie, Graeme. January 1988 (has links) (PDF)
Bibliography: leaves 134-148.
22

The transfer of alkyl groups from boron to magnesium : aspects of theory and experiment /

Threlfall, Clinton A. January 1900 (has links)
Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2002. / Vita. Includes bibliographical references (leaves 124-134).
23

Design, synthesis, and screening of a library of peptidyl bis-boroxoles as low molecular weight receptors for complex oligosaccharides in neutral water: identification of a selective receptor for the tumour marker TF-antigen

Pal, Arnab Unknown Date
No description available.
24

Negative ion chemistry of boron and carbon compounds /

Currie, Graeme. January 1988 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1989. / Includes bibliographical references (leaves 134-148).
25

Halogenolyses of tri-alkylborane /

Lu, Qingyi. January 1990 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1990. / Typescript. References: leaves 66-70.
26

Synthesis and characterization of new boron-nitrogen and boron-nitrogen-phosphorus systems

Cui, Jian. January 2009 (has links) (PDF)
Thesis (Ph. D.)--Texas Christian University, 2009. / Title from dissertation title page (viewed Apr. 19, 2010). Includes abstract. Includes bibliographical references.
27

PART 1: FORMATION OF SOME HETEROCYCLIC COMPOUNDS CONTAINING BORON, CARBON, NITROGEN, AND AN ELEMENT OF GROUP VI. PART 2: MECHANISM OF POLYMERIZATION OF IMIDAZOLE BORANE.

KNAPP, KRAIG KENT. January 1983 (has links)
Part I: Compounds of the type benzo(group VI)azole (I) were treated with diborane using standard vacuum line techniques. The group VI elements were oxygen. sulfur. and selenium. Initially. an insoluble borane adduct formed which spontaneously reduced and replaced carbon in the hetero-ring by boron via an unstable intermediate either (II) or (III). For example. benzoxazole reacted to produce 2-H-3-methyl-l.3.2- benzoxazaborole (IV). The 2-H-3-alkyl-l,3.2-benzo(group VI)azaboroles (V) were easily purified. produced in high yield, and upon methanolysis yielded N-alkyl-2-(group VI)anilines (VI). These boroles were characterized by IR, H-l and B-ll NMR spectra, and mass spectroscopy. Part II: Kinetics of the polymerization of imidazole-borane in the presence of diborane was followed by monitoring hydrogen production at 30°C. Pseudo first-order kinetics was observed at all ratios of diborane to irnidazole-borane, and the observed rate constant increased linearly with excess diborane. A mechanism is proposed in which the diborane acts as a catalyst. Half the hydrogen molecule comes from the diborane, while the other half comes from the nitrogen-bonded hydrogen on imidazole-borane. Hydrogen is formed when diborane reacts with imidazole-borane in a slow step. followed by fast coupling with another imidazole-borane and regeneration of diborane. The structure of the polymer is shown below (VII). and the average size of the polyme1 was 32-38 units.
28

Synthesis and structural characterization of heterocycles incorporating a carboranyl unit.

January 2011 (has links)
He, Xiao. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 75-83). / Abstracts in English and Chinese. / Acknowledgement --- p.I / Abstract --- p.II / 摘要 --- p.III / Abbreviation --- p.IV / List of Compounds --- p.VI / List of Figures --- p.VII / Contents --- p.IX / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Transition Metal-Carboranyl Complexes --- p.2 / Chapter 1.1.1 --- Late Transition Metal-Carboranyl Complexes --- p.2 / Chapter 1.1.2 --- Early Transition Metal-Carboranyl Complexes --- p.6 / Chapter 1.2 --- Transition Metal-Carboryne Complexes --- p.12 / Chapter 1.3 --- Five-Membered Heterocycles Incorporating Main Group Elements --- p.20 / Chapter 1.3.1 --- Synthesis and Reactivity of Boroles --- p.20 / Chapter 1.3.2 --- Synthesis and Reactivity of Phospholes --- p.24 / Chapter 1.3.3 --- Synthsis and Reactivity of Silole --- p.28 / Chapter 1.4 --- Our Objectives --- p.31 / Chapter Chapter 2 --- Nickelacycles Incorporating a Carboranyl Unit --- p.32 / Chapter 2.1 --- Introduction --- p.32 / Chapter 2.2 --- "Synthesis, Characterization and Reactivity of Nickelacycles Bearing (2-CPh2O-l,2-C2B10H10)2-Ligand" --- p.32 / Chapter 2.2.1 --- Synthesis and Characterization --- p.32 / Chapter 2.2.2 --- Reactivity Study --- p.34 / Chapter 2.2.3 --- X-ray Structure --- p.36 / Chapter 2.3 --- "Synthesis and Characterization of Nickelacycles Bearing [2-C(Ph)=N-l,2-C2B10H10]2- Ligand" --- p.44 / Chapter 2.3.1 --- Synthesis and Characterization --- p.44 / Chapter 2.3.2 --- X-ray Structure --- p.45 / Chapter Chapter 3 --- Five-membered Heterocycles of Main Group Elements Incorporating a Carboranyl Unit --- p.47 / Chapter 3.1 --- Synthesis and Characterization of Heterocycles Bearing Phosphorus Element --- p.47 / Chapter 3.2 --- Synthesis and Characterization of Heterocycles Bearing Silicon Element --- p.53 / Chapter 3.3 --- Synthesis and Characterization Heterocycles Bearing Boron Element --- p.58 / Chapter Chapter 4 --- Conclusion --- p.61 / Chapter Chapter 5 --- Experimental Section --- p.63 / References --- p.75 / Appendix --- p.84 / Chapter I. --- Crystal Data and Summary of Data Collection and Refinement --- p.84 / Chapter II. --- X-ray crystallographic data in CIF (electronic form)
29

The attempted synthesis of 4,4-dimethyl-3-dimethylamino-2,6-cyclohexanedione carboxamide

Cockerline, Roger Leith 01 January 1971 (has links)
The use of boron-containing amines for the amino alkylation of amides has been investigated in our laboratories with the aim of preparing compounds which could be used in neutron capture therapy. The purpose of this procedure is to achieve selective irradiation of a neoplactic growth by inducing radioactivity throughout that tissue. Although the results obtained in destroying tumors have not always been encouraging, they have been such - especially in cases not amenable to treatment by surgery or chemotherapy - that further research is warranted in order to develop drugs that can be used effectively in neutron capture therapy (Farr, Robertson & Stickley, 1954). This method of cancer treatment is still in the experimental stages of development, but it will, no doubt, gain the active interest of more clinical workers in the near future.
30

Preparation of Organoboronates through Nickel-Catalyzed Conjunctive Coupling Reactions and Their Applications:

Koo, Seung Moh January 2020 (has links)
Thesis advisor: James P. Morken / This thesis will describe the development of two transition metal catalyzed syntheses of organoboronic compounds. The first section describes relevant concepts and precedents for the conjunctive coupling reaction. In the second section of this thesis, nickel catalyzed conjunctive coupling reaction of carboxylic acid derivatives with 9-BBN derived ate complexes will be discussed, where beta-trialkylboryl ketones are obtained as the product. In the third section, the development of alkyl group migration in nickel-catalyzed conjunctive coupling with C(sp3) electrophiles will be discussed. Enantioenriched secondary boronic esters can be prepared from this reaction, and two alkaloid syntheses are disclosed as the application of the method. / Thesis (MS) — Boston College, 2020. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.

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