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Showing 1 to 14 of 14 for “"Boron compounds"”.
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Studies of Some Hindered Boron Compounds
Made available in DSpace on 2014-12-05T19:37:10Z (GMT). No. of bitstreams: 1 5904517.pdf: 3310079 bytes, checksum: d4cd0263b3984cf9f25a5468088f2349 (MD5) Previous issue date: 1959
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The electrolysis of lithium alkyls and ethyl magnesium bromide in lithium borohydride-diethyl ether solutions
… is a widespread interest in the chemistry of boron. Especially is this true in the field of organo-boron compounds, for boron has been found to possess the property of forming ring and chain compounds with itself or with certain organic groups. Many organo—boron compounds may be prepared by …
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Simulation of the CRUD formation process using the Lattice Boltzmann Method
… they are at present. It is a phenomenon where boron compounds such as lithium metaborate LiBO$_2$ and nickel-boroferrite Ni$_2$FeBO$_5$ (known as mineral bonaccordite) concentrate and precipitate during reactor operation in corrosion products deposited on high-duty fuel assemblies at subcooled …
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Radiobiological evaluation of new boron delivery agents for boron neutron capture therapy
… the radiobiological effectiveness of three new boron compounds namely a boronated porphyrin (BOPP) and two liposome formulations for neutron capture therapy (BNCT). The methodology utilizes in vitro and in vivo comparisons that characterize compounds relative to boric acid and …
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The electronic and mechanical properties of the XYB14 complex borides studied by first-principles methods
… to chemical corrosion. Alternatively, boron compounds are promising candidates because of boron's hardness and excellent chemical and thermal stability.</p> <p>Conventional superhard materials, such as diamond and cubic boron nitride, are usually comprised of a strong, covalently bonded …
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Nuclear magnetic resonance studies of boron trihalide complexes of 1,1-BIS (dimethylamino) ethylene and related bases
Boron tribalide complexes of 1,1-bis(dimethylamino)ethylene (DME) , t etramethylurea (TMU), tetramethylguanidine (TMG) , and pentamethylguanidine (PMG) and also mixed boron t r ihalide adducts of DME have been investigated by 1H and 19F NMR spectroscopy. Both nitrogen and the C-Q-H carbon of DME …
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Tetracycline-7-boronic acid
… this study is the preparation of a tetracycline-boron-10 derivative which is stable under biological conditions. The boron-10 should then provide a concentration of material capable of accepting thermal neutrons, thus producing localized high-energy alpha radiation. The fact that the …
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An investigation into the ring-enlargement reactions of boron subphthalocyanine and boron subnaphthalocyanine
… enlargement syntheses of axially substituted boron subphthalocyanine and boron subnaphthalocyanine were investigated. The trihexylsiloxy derivatives of subphthalocyanine and subnaphthalocyanine were synthesized. These derivatives were then used in the ring-enlargement trials. Symmetrical and …
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Iridium-Catalyzed Enantioselective Allylation of Alkenyl Boronates
Organoboronic esters are highly functionalizable synthetic intermediates owing to their unique reactivity that allows for pre-complexation with organometallic reagents to form boronates, which can then engage in bimolecular reactions. Furthermore, incorporation of boronic esters into their …
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Kinetics of the ligand exchange reactions between bidentate ligands and rriethylenetetramine nickelate (II) and synthesis of boron (III) subphthalocyanines with various boron substitutions
… M-2 s-1</p> <p>Part 2. Axial substitution on boron (III) subphthalocyanines (SubPcs) were investigated. The Boron subphthalocyanines BsubPcCl and BsubPcOH were synthesized. These derivatives were then used to prepare BsubPcSiHx3, BsubPcBu, and BsubPcOSi(CH2CH2CH2CH3)3. This study represents …
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Exchange reactions of organic halides and organo-silicon compounds with boron tribromide and boron triiodide
Reactions of the boron halides with organic halides and organo-silicon compounds have been investigated. The results show exchange of halogens between the BX3 (X = Br# 1) and the organic halidef exchange of the halogen of the C-X bond being proved. The rates of halogen exchange vary. Reaction of …
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Chelated fluoroboron cations : synthesis and multinuclear nmr studies
The preparation of chelated difluoroboron cations (DD)BF2+, where DD is a saturated polydentate tertiary-amine or polydentate aromatic ligand, has been systematically studied by using multinuclear solution and solid state nuclear magnetic resonance spectroscopy and fast atom bombardment mass …
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A synthesis of a homologous series of aryl mono- and diboronic acids
<p>Many attempts have been made to prepare aryl boronic acids and their esters which show a preferential affinity for tumor tissues for use in radiation therapy of neoplatic disorders (1,2). The data of Soloway, as extended and refined by Hansch and his coworkers, successfully correlates the low …