<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes"^^ . "Chemical transformations of ligated borane complexes, including N-heterocyclic carbene boranes, are demonstrated. Chapter 1 begins with an introduction of Lewis base borane complexes, rhodium carbene chemistry, and B–H insertion of ligated boranes. The second part of Chapter 1 describes the insertion of rhodium carbenes, previously demonstrated with NHC-boranes, into the B–H bonds of other ligated boranes. Stable ligated α-boryl esters were isolated. A series of competitive B–H insertion experiments are described that were used to develop a relative reactivity profile of ligated boranes toward rhodium-catalyzed B–H insertion. The enantioselective B–H insertion of NHC-boranes with chiral dirhodium catalysts was also investigated. Finally, the synthesis and application of two chiral bridged dirhodium catalysts is described.\r\n\tChapter 2 describes the discovery and isolation of NHC-boryl hydrazones by non-chain radical recombinations of NHC-boranes, diazomalonates, and azo initiators. Thermal 1,1-hydroborations of a diazo dione and a diazonium salt to give boryl hydrazone and boryl diazene products are demonstrated. Chapter 3 explores the use of electrophilic NHC-borane complexes to catalyze B–H insertion reactions with diazoesters. The boryl iodide catalyzed method is adept at producing α-substituted-α-NHC-boryl esters. A small family of NHC-boryl esters with amino acid side chains was synthesized. Chapter 4 describes the basic hydrolyses of ligated α-boryl esters to yield ligated α-boryl acetic acids. The boryl acetic acid derivatives were characterized by X-ray crystallography and acidity constant measurements. They are among the least acidic carboxylic acids known. The electron-donating ability of ligated borane substituents was further quantified by using derived Hammett constants from 13C NMR chemical shift correlation experiments."^^ . "2018-09-26" . . . . . . . . "Thomas"^^ . "Allen"^^ . "Thomas Allen"^^ . . . . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (PDF)"^^ . . . "allenth_PittETD2018_1.pdf"^^ . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (Other)"^^ . . . . . . "preview.jpg"^^ . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (Other)"^^ . . . . . . "medium.jpg"^^ . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (Other)"^^ . . . . . . "small.jpg"^^ . . . "New Boron–Hydrogen Insertion Reactions of Ligated Boranes (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #34993 \n\nNew Boron–Hydrogen Insertion Reactions of Ligated Boranes\n\n" . "text/html" . .