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AbstractAbstract
[en] Nucleophilic additions of water-soluble phosphines on α-alcynic acids afford new vinylphosphonium salts which are easily transformed into specifically deuteriated olefins or phosphine oxides by using sequentially H2O or D2O. (author)
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Passos, B. de F.T.; Jesus Filho, M.F. de; Filgueiras, C.A.L.; Abras, A.
Proceedings of the 1. Latin-American Conference on Applications of the Moessbauer Effect1988
Proceedings of the 1. Latin-American Conference on Applications of the Moessbauer Effect1988
AbstractAbstract
[en] A series of organotin complexes was prepared involving phosphines bonded to the organotin moiety. The series include derivatives of SnClxPh4-x (where x varied from zero to four with the phosphines Ph3P, (Ph2P)CH2, (Ph2P)2(CH2)2, cis-(Ph2P)CH2, and CH3C(CH2PPh2)3. A host of new complexes was obtained, showing different stoichiometries, bonding modes, and coordination numbers around the tin atom. These complexes were characterized by several different chemical and physical methods. The 119Sn Moessbauer parameters varied differently. Whereas isomer shift values did not great variation for each group of complexs with the same organotin parent (SnClxPh4-x), reflecting a small change in s charge distribution on the Sn atom upon complexation, quadrupole splitting results varied widely, however, when the parent organotin compound was wholly symmetric (SnCl4 and SnPPh4), the complexes also tended to show quadrupole splitting values approaching zero. (author)
Source
Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil); Minas Gerais Univ., Belo Horizonte, MG (Brazil); Sao Paulo Univ., SP (Brazil); 445 p; 1988; p. 298-301; 1. Latin-American Conference on Applications of the Moessbauer Effect; Rio de Janeiro, RJ (Brazil); 31 Oct - 4 Nov 1988; Available from the Library of the Comissao Nacional de Energia Nuclear, RJ, Brazil
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De Silva, Nuwan; Zahariev, Federico; Hay, Benjamin P.; Gordon, Mark S.; Windus, Theresa L.
Ames Laboratory (AMES), Ames, IA (United States). Funding organisation: USDOE (United States)2015
Ames Laboratory (AMES), Ames, IA (United States). Funding organisation: USDOE (United States)2015
AbstractAbstract
[en] The conformations of a series of organophosphine oxides, OP(CH_3)_2R, where R = methyl, ethyl, isopropyl, tert-butyl, vinyl, and phenyl, are predicted using the MP2/cc-pVTZ level of theory. Comparison of potential energy surfaces for rotation about P-C bonds with crystal structure data reveals a strong correlation between predicted location and energetics of minima and histograms of dihedral angle distributions observed in the solid state. In addition, the most stable conformers are those that minimize the extent of steric repulsion between adjacent rotor substituents, and the torsional barriers tend to increase with the steric bulk of the rotating alkyl group. MM3 force field parameters were adjusted to fit the MP2 results, providing a fast and accurate model for predicting organophosphine oxides shapes - an essential part of understanding the chemistry of these compounds. As a result, the predictive power of the modified MM3 model was tested against MP2/cc-pVTZ conformations for triethylphosphine oxide, OP(CH_2CH_3)_3, and triphenylphosphine oxide, OP(Ph)_3
Primary Subject
Source
IS-J--8636; OSTIID--1227401; AC02-07CH11358; Available from: DOI:10.1021/acs.jpca.5b04687; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period from OSTI using http://www.osti.gov/pages/biblio/1227401
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Journal Article
Journal
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory; ISSN 1089-5639;
; v. 119(32); p. 8765-8773

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AbstractAbstract
[en] Two tetravalent uranium compounds have been characterized. The structure of a new uranium(IV) phosphonate, U(O3PC6H5)2, has been solved from laboratory X-ray powder diffraction data by using ab initio methodology, U(O3PC6H5)2 crystallizes in the space group Cw/m with a = 9.4559(7) Angstrom, b = 5.6769(5) Angstrom, c = 14.9687(12) Angstrom, Β = 96.539(5) Angstrom, V = 798.3(1) Angstrom 3, Z=2. The reliability factors were RWP = 8.0%, Rp = 6.04%, and RF = 3.0%. The structure is lamellar, and the framework of the U(O3P)2 layers is similar to that of the α-Zr(HOP4)2 · H2O and the phosphonate group in Zr(O3PC6H5)2. The phenyl groups are located in the interlamellar space, being inclined 10 degrees to the c-axis. The phenyl rings are tilted out 53 degrees from the ac plane, and they are disordered. The authors have also characterized this compound by UV-VIS-IR spectroscopies and thermal analysis. The thermal decomposition product is uranium(IV) pyro phosphate. This compound was identified through its X-ray powder diffraction pattern. UP2O7 crystallizes in the Pa3 space group (a = 8.6311(2) Angstrom, V = 642.99(4) Angstrom 3,Z=4). The structure belongs to the cubic ZrP2O7-type structure. The reliability factors were RWP = 11.7%, Rp = 8.6%, and RF = 10.4%. Disorder has been found in the oxygen that bridges the pyrophosphate groups, leading to an angular P-O-P arrangement. The VIS-near-IR adsorption spectra revealed the uranium(IV) presence and the oxygen environment
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Hays, A.K.
Sandia National Labs., Albuquerque, NM (USA)1984
Sandia National Labs., Albuquerque, NM (USA)1984
AbstractAbstract
[en] Amorphous metal alloy films were produced by the plasma-dissociation of Ni(CO)4 and PH3 in a hydrogen carrier gas. These films possessed relatively low carbon and oxygen contents despite the fact that they were deposited at low temperatures and high rf power densities. The P content of these films was a factor of three greater than the P content of the plasma gas mixtures used to prepare the films
Primary Subject
Source
1984; 8 p; Symposium on the scientific basis for nuclear waste management; Boston, MA (USA); 26-29 Nov 1984; CONF-841157--5; Available from NTIS, PC A02/MF A01; 1 as DE85000768
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AbstractAbstract
No abstract available
Original Title
Ob indikatsii glubokikh urovnej v poluprovodnikakh
Source
For English translation see the journal Sov. Phys.-Solid State. Published in summary form only.
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Journal Article
Journal
Fizika Tverdogo Tela; v. 15(1); p. 284-286
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Jin, Hyung Dae; Chang, Chih-Hung; Garrison, Anna; Tseng, T; Paul, Brian K, E-mail: changch@engr.orst.edu2010
AbstractAbstract
[en] Growth in the potential applications of nanomaterials has led to a focus on the development of new manufacturing approaches for these materials. In particular, an increased demand due to the unique properties of nanomaterials requires a substantial yield of high-performance materials and a simultaneous reduction in the environmental impact of these processes. In this paper, a high-rate production of phosphine-stabilized undecagold nanoclusters was achieved using a layer-up strategy which involves the use of microlamination architectures; the patterning and bonding of thin layers of material (laminae) to create a multilayered micromixer in the range of 25-250 μm thick was used to step up the production of phosphine-stabilized undecagold nanoclusters. The continuous production of highly monodispersed phosphine-stabilized undecagold nanoclusters at a rate of about 11.8 (mg s-1) was achieved using a microreactor with a size of 1.687 cm3. This result is about 500 times over conventional batch syntheses based on the production rate per reactor volume.
Primary Subject
Source
S0957-4484(10)50660-3; Available from http://dx.doi.org/10.1088/0957-4484/21/44/445604; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Nanotechnology (Print); ISSN 0957-4484;
; v. 21(44); [7 p.]

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AbstractAbstract
No abstract available
Original Title
Vliyanie svyazej razlichnogo tipa v soedineniyakh sistemy Cd-P na raspredelenie intensivnosti v rentgenovskikh ehmissionnykh polosakh
Secondary Subject
Source
11. all-union conference on X-ray spectroscopy; Rostov-na-Donu, USSR; 12 Sep 1975; Short communication only; for English translation see the journal Bull. Acad. Sci. USSR, Phys. Sci.
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Journal Article
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Izvestiya Akademii Nauk SSSR, Seriya Fizicheskaya; v. 40(2); p. 385-388
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Schulz, W.W.
Atlantic Richfield Hanford Co., Richland, Wash. (USA)1970
Atlantic Richfield Hanford Co., Richland, Wash. (USA)1970
AbstractAbstract
No abstract available
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1 Aug 1970; 27 p
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AbstractAbstract
No abstract available
Original Title
Die Pentaphosphide der Seltenerdmetalle
Primary Subject
Source
1977; 1 p; 17. general meeting of the Gesellschaft Deutscher Chemiker; Muenchen, Germany, F.R; 12 - 16 Sep 1977; Available from ZAED; 2 refs. Short communication only.
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