Thesis advisor: Amir H. Hoveyda / Chapter 1. We have developed a catalytic method for enantio- and SN2’-selective allylic substitution of commercially available diborylmethane to trisubstituted allylic phosphates (pin = pinacolato). The transformations are catalyzed by NHC–Cu complexes (NHC = N-heterocyclic carbene). Products bearing quaternary stereogenic carbon centers are obtained in up to 86% yield (after oxidation), >98:2 SN2’/SN2 selectivity and 95:5 enantiomeric ratio (e.r.). Chapter 2. We have developed a facile multicomponent catalytic process that begins with a chemo- and site-selective copper–hydride addition to allenyl-B(pin) followed by enantioselective conjugate addition of the resulting allylcopper intermediate to α,β-unsaturated malonate, generating products that contain a stereogenic center and an easily functionalizable alkenyl-B(pin) group in up to 84% yield, >98:2 E/Z selectivity and 96:4 enantiomeric ratio. The transformations are catalyzed by chiral Cu complexes derived from commercially available bisphosphines and CuCl. / Thesis (MS) — Boston College, 2017. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.

Thesis (Ph. D.)--University of Chicago, 1936. / Lithoprinted. "Private edition, distributed by the University of Chicago libraries, Chicago, Illinois."

Thesis advisor: James P. Morken / This dissertation will discuss the development of three methodologies for the enantioselective synthesis of organoboron compounds. The first chapter will discuss the initial discovery and development of a palladium-catalyzed reaction that enables the combination of an organolithium, an organoboronic ester and C(sp2)-OTf electrophiles in an enantioselective fashion. This conjunctive cross-coupling takes place through a 1,2-metallate shift which is induced from an alkenylboron ‘ate’ species through interaction with the palladium catalyst. The second chapter of this manuscript will discuss the development of the first nickel-catalyzed version of the conjunctive cross- coupling reaction, which operates enantioselectively with in situ generated 9-BBN boranes. The third and last chapter will discuss the development of complementary method to the conjunctive cross-coupling which enables the enantioselective addition of organozinc reagents and alkyl halides across alkenylboronic esters. This system departs from the metal-induced 1,2-metallate shift mode of reactivity in favor of a Ni- catalyzed radical/addition cross-coupling cascade reaction. This process can be operated in both an inter- and intra-molecular fashion to afford enantiomerically-enriched alkylboronic ester compounds. / Thesis (PhD) — Boston College, 2019. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.

Kwong Wai-chuen. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (leaves 98-102). / Abstracts in English and Chinese. / Acknowledgement --- p.I / Abstract (in English) --- p.II / Abstract (in Chinese) --- p.III / Abbreviation --- p.V / List of Compounds --- p.VI / Contents --- p.VII / Chapter Chapter 1. --- Introduction / Chapter 1.1 --- Metallacarboranes of the C2B4 Systems --- p.1 / Chapter 1.1.1 --- Group 1 Metallacarboranes of the C2B4 Systems --- p.3 / Chapter 1.1.2 --- Group 4 Metallacarboranes of the C2B4 Systems --- p.6 / Chapter 1.2 --- Group 4 Metallacarboranes of the C2B9 Systems --- p.17 / Chapter 1.3 --- Group 4 Metallacarboranes of the C2B10 Systems --- p.35 / Chapter 1.4 --- Applications of Group 4 Metallacarboranes --- p.44 / Chapter 1.5 --- Research Objectives --- p.47 / Chapter Chapter 2. --- Synthesis and Structural Characterization of Group4 Metallacarboranes of the C2B9 Systems / Chapter 2.1 --- Synthesis and Structural Characterization of {{466}4:η2-[(C6H5CH2)2C2B9H9]2ZrCl(THF)} {Na(THF)3} --- p.48 / Chapter 2.2 --- Synthesis and Structural Characterization of [η4:η2- {(C6H5CH2)2C2B9H9} 2ZrCl(THF)] [Li(THF)4] --- p.54 / Chapter 2.3 --- Synthesis and Structural Characterization of ZrCl[N(SiMe3)2]3 --- p.57 / Chapter 2.4 --- "Synthesis and Structural Characterization of η2-(C6H5CH2)2C2B9H9]M(NEt2)2(NHEt2HCH2Cl2) (M = Ti, Zr)" --- p.62 / Chapter 2.5 --- "Synthesis and Structural Characterization of [μ-{ o-C6H4(CH2)2 }C2B9H9]2M(THF)2 (M = Zr, Hf)" --- p.68 / Chapter 2.6 --- Conclusion --- p.71 / Chapter Chapter 3. --- Synthesis and Structural Characterization of Group4 Metallacarboranes of the C2B10 Systems / Chapter 3.1 --- "Synthesis and Structural Characterization of {{471}-l,，2-(o-C6H4(CH2)2)- 1,2-C2B 10H10]2Zr} {Na(THF)3}2 and {[μ-l，2-(o-C6H4(CH2)2)-l,2- C2B10H10]2ZrCl2} {Na(THF)3}2(THF)" --- p.72 / Chapter 3.2 --- Conclusion --- p.78 / Chapter Chapter4. --- Summary --- p.79 / Chapter Chapter5. --- Experimental Section --- p.81 / References --- p.98 / Appendix / Chapter I. --- Crystal Data and Summary of Data Collection and Refinement --- p.103 / Chapter II. --- Atomic Coordinates and Thermal Parameters --- p.109 / Chapter III. --- Bond Distances and Angles --- p.117

Kit-Hung Wong. / Thesis submitted in: October 2003. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 77-86). / Abstracts in English and Chinese. / Acknowledgement --- p.III / Content --- p.IV / Abstract (in English) --- p.VI / Abstract (in Chinese) --- p.VIII / List of Compounds --- p.IX / List of Figures --- p.X / List of Abbreviations --- p.XI / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Background --- p.1 / Chapter 1.2 --- p-Block Metallacarboranes --- p.2 / Chapter 1.2.1 --- C2B4 systems --- p.2 / Chapter 1.2.1.1 --- ´بCarbons-Adjacent´ة Metallacarboranes --- p.2 / Chapter 1.2.1.2 --- ´بCarbons-Apart´ة Metallacarboranes --- p.6 / Chapter 1.2.2 --- C2B9 systems --- p.7 / Chapter 1.2.3 --- C2B10 systems --- p.10 / Chapter 1.3 --- d-Block Metallacarboranes --- p.11 / Chapter 1.3.1 --- C2B9 systems --- p.11 / Chapter 1.3.2 --- C2B10 systems --- p.15 / Chapter 1.4 --- Objectives --- p.16 / Chapter Chapter 2 --- "Synthesis, Structural Characterization and Reactivity of Group13 Metallacarboranes" / Chapter 2.1 --- Introduction --- p.18 / Chapter 2.2 --- Synthesis and Spectroscopic Characterization --- p.19 / Chapter 2.3 --- Molecular Structure --- p.21 / Chapter 2.4 --- Conclusion --- p.26 / Chapter Chapter 3 --- "Synthesis, Structural Characterization and Reactivity of Group14 Metallacarboranes" / Chapter 3.1 --- Introduction --- p.27 / Chapter 3.2 --- Synthesis and Reactivity --- p.28 / Chapter 3.3 --- Characterization --- p.29 / Chapter 3.4 --- Discussion --- p.33 / Chapter 3.5 --- Conclusion --- p.35 / Chapter Chapter 4 --- "Synthesis, Structural Characterization and Reactivity d-Block Metallacarboranes" / Chapter 4.1 --- Introduction --- p.36 / Chapter 4.2 --- Synthesis and Characterization --- p.36 / Chapter 4.3 --- Molecular Structure --- p.43 / Chapter 4.4 --- Ultraviolet Spectroscopy --- p.49 / Chapter 4.5 --- Electrochemical Studies --- p.51 / Chapter 4.6 --- Reactivity --- p.53 / Chapter 4.7 --- Conclusion --- p.55 / Chapter Chapter 5 --- Conclusion --- p.57 / Chapter Chapter 6 --- Experimental Section --- p.60 / Reference / Appendix / Chapter I. --- Publication Based on the Research Findings --- p.86 / Chapter II. --- Crystal Data and Summary of Data Collection and Refinement --- p.87 / Chapter III. --- Atomic Coordinates and Thermal Parameter --- p.89 / Chapter IV. --- Bond Distances and Angles --- p.95

Thesis (M. Sc.)--University of Alberta, 2009. / Title from pdf file main screen (viewed on Jan. 11, 2010). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science, Department of Chemistry, University of Alberta." Includes bibliographical references.

No description available.

The impact of two constitutional isomers, 2-(4-BMes2-Ph)-pyridine (p-B-ppy) and 5-BMes2-2-ph-pyridine (p-ppy-B), as N,C-chelate ligands on the structures, stabilities, electronic and photophysical properties, and Lewis acidities of Pt(II) complexes has been investigated. Six Pt(II) complexes, Pt(p-B-ppy)Ph(DMSO), Pt(p-B-ppy)Ph(Py), [Pt(p-B-ppy)Ph]2(4,4’-bipy), Pt(p-ppy-B)Ph(DMSO), Pt(p-ppy-B)Ph(Py), and [Pt(p-ppy-B)Ph]2(4,4’-bipy), have been synthesized and fully characterized. The Lewis acidity of the complexes was examined by fluoride titration experiments using UV-Vis, phosphorescence, and NMR spectroscopic methods, establishing that the p-ppy-B complexes have stronger binding constants while the p-B-ppy complexes have a much lower affinity toward F-. A diboron compound with both 3-coordinate boron and 4-coordinate boron centers, (5-BMes2-2-ph-py)BMes2 (B2ppy) has been synthesized, which is luminescent but have a high sensitivity toward light. UV and ambient light cause this compound to isomerize via the formation of a C−C bond between a mesityl and the phenyl group, accompanied by a drastic color change from yellow to dark olive green. The structure of the dark color species was established by 2D NMR experiments and geometry optimization by DFT calculations. The dark color species can thermally reverse back to (5-BMes2-2-ph-py)BMes2 via the breaking of a C−C bond. The N, C-chelate ligand was found to play a key role in promoting this unusual and reversible photo–thermal isomerization process on a tetrahedral boron center. The impact of Pt(II) on the photoisomeration of four-coordinate boron center was also studied. The free ligand four-coordinate organoboron derivative B-ppy-ppy behaved in the same way as B2ppy. The photoisomeration process in the corresponding Pt(II) coupled complex (B-ppy-ppy)PtPh(t-Bu-py) is nearly completely deactivated, which may be attributed to either the low-lying 3MLCT excited state through which the excess energy in excited state was dissipated as phosphorescence or the greater π conjugation which can stabilize the excited state. / Thesis (Master, Chemistry) -- Queen's University, 2009-09-24 14:56:32.845

Thesis (M.S.)--Rochester Institute of Technology, 1991. / Typescript. Includes bibliographical references.

Thesis (Ph. D.)--University of California, San Diego, 2004. / Vita. Includes bibliographical references (leaves 171-181).