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Subject Index
SUBJECT INDEX Vol. 1: 1–698, Vol. 2: 699–1395, Vol. 3: 1397–2111, Vol. 4: 2113–2798, Vol. 5: 2799–3440. Page numbers suffixed by t and f refer to Tables and Figures respectively. Absorption cross section, neutron scattering inner v. outer sphere complexations, and, 2233 2563–2566, 2566f, 2567t Absorption spectra, of uranium dioxide, oxidation states of, 2525–2527, 2525f 2276–2278, 2277f stability constants of, 2558–2559 Absorption spectroscopy, resonance correlations, 2567–2577 effects in, 2236 trivalent, 2562, 2563t Accelerator transmutation of waste (ATW), Actinide (III), hydration of, 2528–2530, 2693–2694 2529f, 2529t Acetates, structural chemistry of, Actinide chalcogenides, structural chemistry 2439t–2440t, 2440–2445, 2444f of, 2409–2414, 2412t–2413t Acetylacetones, SFE separation Actinide chemistry with, 2680 complexation and kinetics in solution, Acidic extractants, for solvent extraction, 2524–2607 2650–2652, 2651f bonding, 2556–2563 Actinide cations cation-cation complexes, complexes of, 2577–2591 2593–2596 with inorganic ligands, 2578–2580, cation hydration, 2528–2544 2579t, 2581t cation hydrolysis, 2545–2556 with inorganic oxo ligands, complexation reaction kinetics, 2580–2584, 2582t 2602–2606 with organic ligands, 2584–2591, complexes, 2577–2591 2585t–2586t, 2588f, 2589t correlations, 2566–2577 correlations in, 2567–2577 inner v. outer sphere, 2563–2566 Gibbs energy, 2568–2570, 2568f–2569f redox reaction kinetics, 2597–2602 ligand basicity, 2567–2568 ternary complexes, 2591–2593 hydration of, 2528–2544 magnetic properties, -
Sop Pyrophoric 2 12/16/2019
Owner DOC. NO. REV. DATE C.H.O SOP PYROPHORIC 2 12/16/2019 DOC. TITLE SOP FOR PYROPHORIC CHEMICALS Environmental Health & Safety STANDARD OPERATING PROCEDURES (SOP) FOR WORKING WITH PYROPHORIC CHEMICALS AT AMHERST COLLEGE ___________________________________________________________________ General Information Pyrophoric Chemicals are solid, liquid, or gas compounds that, when exposed to air or moisture at or below 54°C (130°F), can spontaneously ignite. Examples of Pyrophoric chemicals used at Amherst College Laboratories include: sodium hydride, zinc powder, and Grignard reagents. See the “Appendix” page below for a full list of Pyrophoric Chemicals. Pyrophoric chemicals are often used as catalysts in chemical reactions or as reducing and deprotonating agents in organic chemistry. Note that Pyrophoric chemicals may also be characterized by other hazards, hence, users of these chemicals may also need to refer to other SOPs that cover other hazards. In addition, each individual chemical’s Safety Data Sheet (SDS) should be consulted before they are used. _____________________________________________________________________________________ Personal Protective Equipment When working with Pyrophoric Chemicals, the following personal protective equipment (PPE) must be worn, at a minimum. Depending on the specific chemical, other forms of protection might be required. Consult the SDS for each chemical before use: Splash goggles Lab coat (Fire resistant lab coat highly recommended) Long pants Close toed shoes Gloves – Nitrile gloves adequate for accidental contact with small quantities. However, the use of fire resistant Nomex/ Leather Pilot’s gloves is highly recommended _____________________________________________________________________________________ Safety Devices All work with Pyrophoric chemicals must be done in a glove box, vacuum manifold, or any enclosed inert environment. If work must be done in a fume hood, ensure that the hood sash is in the lowest feasible position. -
The First Hydrides of Boron
UNIVERSIDADE DE LISBOA FACULDADE DE CIÊNCIAS SECÇÃO AUTÓNOMA DE HISTÓRIA E FILOSOFIA DAS CIÊNCIAS UNDER THE CARBON SPELL: DIBORANE’S PUZZLING STRUCTURE AND THE EMERGENGE OF BORON CHEMISTRY Nuno Manuel Castanheira de Figueiredo Dissertação orientada pela Professora Doutora Ana Simões, da Secção Autónoma de Filosofia e História das Ciências da Faculdade de Ciências da Universidade de Lisboa. MESTRADO EM HISTÓRIA E FILOSOFIA DAS CIÊNCIAS 2011 Resumo Este trabalho apresenta o primeiro estudo sistemático da história da química dos boranos, compostos de boro e hidrogénio cujas estruturas e natureza das ligações químicas desafiaram de forma irredutível a teoria da ligação química até aos anos cinquenta do século XX. Actualmente, a química do boro é um dos mais promissores ramos da química, com um vasto leque de aplicações às indústrias química e farmacéutica, à nano-tecnologia e à medicina. Neste último ramo, destacam-se as aplicações na luta contra o cancro e no desenvolvimento de medicamentos com um elevado grau de especificidade e inovação. Num futuro próximo, espera-se que a química do boro seja capaz de operar uma verdadeira revolução social, posicionando-se como uma poderosa alternativa à química do carbono que será capaz de oferecer todo um novo mundo de aplicações inéditas. Estas são o resultado da fascinante capacidade do átomo de boro para se ligar de formas surpreendentes e formar complexas estruturas que se baseiam em compostos de boro e hidrogénio (boranos). A grande apetência do boro para se ligar ao oxigénio impede que os boranos existam na natureza. A grande susceptibilidade destes à acção da humidade e do ar torna-os especialmente instáveis e difíceis de manusear e preservar. -
Footsteps on the Borane Trail*
.3 Joumnl of Organometallic Chemistry, 100 (1975) 3-15 0 ElsevierSequoia S.A., Lausanne-Printed in The Netherlands FOOTSTEPS ON THE BORANE TRAIL* w HERBE!RTC. BROWN Richard B. Wetherill Lkboratory, Purdue University. West Lafayette, Indiana 47907 (U.S.A.) The course of nearly four decades of research on the preparation and reactions of diborane tid its derivatives is reviewed. Introduction With the growth of chemical research in recent years, there has been a growing tendency for chemical education to emphasize those.topics of current interest. Relatively little attention is paid to the origins of each problem and concept and to the often tortuous path by which we have arrived at our present position in these areas. As a consequence, chemists thus trained appear to have a two-dimensional view of chemistry, they often lack the perspective of those trained in an earlier, less hurried time. My recent book, Boranes in Organic Chemistry, [ll, was written in the hope that it might contribute to providing such perspective to its readers. The commemoration of the one hundredth volume of the J&ma1 of Organometaliic Chemistry appears to provide another opportunity to contribute to the amelioration of this problem. Beginnings The presentation to me in 1936 of the book by Alfred Stock, Hydrides of Boron and Silicon 121, as a graduation gift by my classmate (later my wife), Sarah Baylen, interested me in this exotic area. Accordingly, when I began graduate work at the University of Chicago in that year I decided to work with the late Professor HI. Schlesinger on his program of research on the hydrides of boron. -
Durham E-Theses
Durham E-Theses I. Some studies on Boronium salts; II. the coordination chemistry of Beryllium borohydride Banford, L. How to cite: Banford, L. (1965) I. Some studies on Boronium salts; II. the coordination chemistry of Beryllium borohydride, Durham theses, Durham University. Available at Durham E-Theses Online: http://etheses.dur.ac.uk/9081/ Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in Durham E-Theses • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full Durham E-Theses policy for further details. Academic Support Oce, Durham University, University Oce, Old Elvet, Durham DH1 3HP e-mail: [email protected] Tel: +44 0191 334 6107 http://etheses.dur.ac.uk 2 I. Some Studies on Boronium Salts II. The Coordination Chemistry of Beryllium Borohydride by L. Banford. thesis submitted for the Degree of Doctor of Philosophy in the University of Durham. June 1963. ACKNOWLEDGEMENTS. The author wishes to express his sincere thanks to Professor G.E. Coates, M.A., D.Sc, F.E.I.C., under whose direction this research was carried out, for his constant encouragement and extremely valuable advice. The author is also indebted to the General Electric Company Limited for the award of a Research Scholarship. -
Hermann Irving Schlesinger
NATIONAL ACADEMY OF SCIENCES HERMANN IRVING SCHLESINGER 1882—1960 A Biographical Memoir by GRANT URRY Any opinions expressed in this memoir are those of the author(s) and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoir COPYRIGHT 1994 NATIONAL ACADEMY OF SCIENCES WASHINGTON D.C. HERMANN IRVING SCHLESINGER October 11, 1882-October 3, 1960 BY GRANT URRY T IS A CONSIDERABLE pleasure for me to have been asked to Icomment on the life and career of my mentor. There are among his more than fifty former graduate students more distinguished scientists, but it is unlikely that any among them remembers their tenure in the laboratories of Dr. Schlesinger with more gratitude or greater fondness than I. At the outset it should be said that my memory has been greatly aided by information furnished through the kind efforts of Ms. Joan Shiu of the Department of Chemistry at the University of Chicago and Dr. Elizabeth J. Sherman at the National Academy of Sciences. One of the outstanding chemists of this century, Profes- sor Schlesinger's greatest contribution to his chosen profes- sion was the discovery of the borohydrides and the alumino- hydrides. He devised simple, high-yield syntheses of these classes of compounds, making them available as uniquely valuable reducing agents, particularly for various functional groups in organic compounds. Without the ready availabil- ity of lithium borohydride and lithium aluminohydride the current state of medicinal chemistry and molecular biology would undoubtedly be severely retarded. He would have viewed the students he trained as his greatest contribution. -
This Thesis Has Been Submitted in Fulfilment of the Requirements for a Postgraduate Degree (E.G
This thesis has been submitted in fulfilment of the requirements for a postgraduate degree (e.g. PhD, MPhil, DClinPsychol) at the University of Edinburgh. Please note the following terms and conditions of use: • This work is protected by copyright and other intellectual property rights, which are retained by the thesis author, unless otherwise stated. • A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. • This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the author. • The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the author. • When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given. Synthesis of f-block Complexes in a Polypyrrolic Macrocyclic Environment Natalie Alison Potter (neé Jones) MSci, AMRSC This thesis is submitted for the degree of Doctor of Philosophy of the University of Edinburgh 5th April 2011 i Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less. Marie Curie ii Declaration Except where specific reference has been made to other sources, the work presented in this thesis is the original work of the author. It has not been submitted, in whole or in part, for any other degree. Natalie A. Potter 5th April 2010 iii Abstract In this thesis, the chemistry of lanthanide and actinide complexes of Schiff-base, polypyrrolic macrocyclic ligands has been evaluated. -
The Spectroscopy and Photolytic Decomposition of Some Volatile Uranium Compounds
THE SPECTROSCOPY AND PHOTOLYTIC DECOMPOSITION OF SOME VOLATILE URANIUM COMPOUNDS by N. Ghiassee, B.S. , M.Sc., D.I.C. A Thesis submitted for the degree of DOCTOR OF PHILOSOPHY of the University of London Nuclear Technology Laboratories Department of Chemical Engineering & Chemical Technology Imperial College of Science & Technology London, SW7. AUGUST 1979 2 ABSTRACT Methods for the separation of uranium isotopes in volatile compounds of uranium are reviewed, and derivatives of thenoyltrifluoroacetone and of the tetrahydroborates are chosen for further study. The (IV) and (VI) valent complexes of uranium thenoyltrifluoroacetone (TTA) were prepared and sublimation pressures measured. Spectrophotometric studies were also carried out, and are reported for the first time for the (IV) valent complex. Uranium tetrahydroborate, U(BH4)4, was prepared and large well-formed crystals were grown. Infrared and ultraviolet spectra of this compound were examined in the gas phase at room temperature and above ambient temperatures. Analysis of the kinetics of U(BH4)4 thermal decomposition, in the temperature range of 100 to 170°C, and the values of activation energies thus determined, were found and are also reported for the first time. The photolytic decomposition of U(BH4)4 vapour by the action of U.V. light was shown to occur. The quantum yield of one of the decomposition products, diborane gas, (B2H6), was determined. The possible mechanisms for this photochemical reaction are discussed and values of the quantum yield for U(BH4)4 derived. The photochemical stability was investigated employing continuous wave (C.W.) lasers operating in the visible, and infrared spectral regions. No decomposition was observed and the reasons are discussed. -
Nuclear Spins and Moments of the Actinides
APPENDIX I NUCLEAR SPINS AND MOMENTS OF THE ACTINIDES Nuclear spins and nuclear moments are used to test the single‐particle models and nuclear quadrupole moments provide the deformation of the nucleus. In the following table, we present measured values of ground state spin in units of h, magnetic dipole moment (m) in units of nuclear magneton, and spectroscopic quadrupole moment (Q) in units of barns. The data have been taken from Raghavan (1989) and Firestone and Shirley (1996). Nuclear Nuclear magnetic moment Electric quadrupole Nuclide spin (ħ) (nuclear magneton) moment (barns) 217Ac 9/2 þ3.825(45) 227Ac 3/2 þ1.1(1) þ1.7(2) 229Th 5/2 þ0.46(4) þ4.3(9) 228Pa 3 þ3.48(33) 230Pa 2 þ2.00(29) 231Pa 3/2 þ2.01(2) –1.72(5) 233Pa 3/2 þ3.39(70) À3.0 233U 5/2 0.59(5) 3.663(8) 235U 7/2 À0.38(3) 4.936(6) 237Np 5/2 þ3.14(4) þ3.886(6) 238Np 2 239Np 5/2 239Pu 1/2 þ0.203(4) 241Pu 5/2 À0.683(15) þ5.6(20) 241Am 5/2 þ1.61(3) þ4.2(13) 242Am 1 þ0.3879(15) À2.4(7) 242mAm 5 þ1.00(5) þ6.5(20) 243Am 5/2 þ1.61(4) þ4.30(3) 243Cm 5/2 0.41 245Cm 7/2 0.5 (1) 247Cm 9/2 0.37 249Bk 7/2 2.0(4) þ5.79 249Cf 9/2 À0.28 253Es 7/2 þ4.10(7) 6.7(8) 254mEs 2 2.90(7) 3.7(5) Firestone, R.B. -
14-Coordinate Uranium(1V). the Structure of Uranium Borohydride by Single-Crystal Neutron Diffraction
14-COORDINATE URANIUM (Iv) Inorganic Chemistry, Vol. 11, No. 12, 1972 3009 control of the geometry, and sulfur-sulfur bonding Science Foundation, GP-11701, is acknowledged. Also interactions may dominate the structure. we wish to thank the donors of the Petroleum Research Fund as administered by the American Chemical So- Acknowledgments.-The support of the National ciety for partial support of this work. CONTRIBUTION FROM THE CHEMISTRY DEPARTMENTSOF BROOKHAVENNATIONAL LABORATORY, UPTON, hTEW YORK 11973, COLUMBIAUNIVERSITY, NEW YORK,NEW YORK 10027, AND PRINCETONUNIVERSITY, PRINCETON, NEW JERSEY 08540 14-Coordinate Uranium(1V). The Structure of Uranium Borohydride by Single-Crystal Neutron Diffraction BY E. R. BERNSTEIN,Zs WALTER C. HAMILTON,*2bT. A. KEIDERLING,2a,3 SAM J. LA PLACA,2b S. J. LIPPARD,20 AND J. J. MAYERLE20 Received May 8, 1972 The structure of U(BH4)4 has been refined by a single-crystal neutron diffraction study. The X-ray structure (tetragonal, P4~2~2(P412~2), a = 7.49 (1) A, c = 13.24 (1) A, Z = 4, pcalcd = 2.66 g/cm*) has been confirmed and, in addition, all hydrogen atoms have been located to a precision of 0.04 A. Four of the six BHd-ions surrounding each uranium atom are attached to it by two hydrogen atoms, and use their remaining two hydrogen atoms to bridge neighboring uranium atoms in a helical polymeric structure. Two additional tetrahydroborate groups in a cis configuration are bonded to the uranium atom by three hydrogen atoms, resulting in an overall coordination number of 14. The mean U-H bond length is 2 38 (2) A.