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  • Chemistry  (8)
  • Pseudopotentials  (4)
  • Correlation energy  (1)
  • Disputed paternity, superfetation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Energy-adjusted pseudopotentials for the rare earth elements (1989)
    Springer
    Theoretical chemistry accounts 75 (1989), S. 173-194 
    Details
    ISSN: 1432-2234
    Keywords: Pseudopotentials ; Rare earth elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Nonrelativistic and quasirelativistic energy-adjusted pseudopotentials and optimized (7s6p5d)/[5s4p3d]-GTO valence basis sets for use in molecular calculations for fixed f-subconfigurations of the rare earth elements, La through Lu, have been generated. Atomic excitation and ionization energies from numerical HF, as well as SCF pseudopotential calculations using the derived basis sets, differ by less than 0.1 eV from numerical HF all-electron results. Corresponding values obtained from CI(SD), CEPA-1, as well as density functional calculations using the quasirelativistic pseudopotentials, are in reasonable agreement with experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00528565
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Energy-adjustedab initio pseudopotentials for the second and third row transition elements: Molecular test for M2 (M=Ag, Au) and MH (M=Ru, Os) (1991)
    Springer
    Theoretical chemistry accounts 78 (1991), S. 247-266 
    Details
    ISSN: 1432-2234
    Keywords: Pseudopotentials ; Transition metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Recently published nonrelativistic and quasirelativistic energy-adjustedab initio pseudopotentials representing the M(Z−28)+ cores of the second row transition metal atoms and the M(Z−60)+ cores of the third row transition metal atoms have been tested in SCF, CI(SD) and CEPA1 calculations of the spectroscopic constants (R e ,D e , and ω e ) of the ground states of the neutral and singly charged silver and gold dimers, and in state averaged CASSCF and multi-reference CI(SD) calculations of the spectroscopic constants (R e ,D e , ω e , μ e , ∂μ/∂R). Comparison is made with experimental and reliable theoretical data where available; in the case of the hydrides, additional calculations with pseudopotentials published by other groups have been made for comparison.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01112848
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A combination of quasirelativistic pseudopotential and ligand field calculations for lanthanoid compounds (1993)
    Springer
    Theoretical chemistry accounts 85 (1993), S. 441-450 
    Details
    ISSN: 1432-2234
    Keywords: Lanthanoid elements ; Pseudopotentials ; Ligand field model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Improved energy-adjusted quasirelativistic pseudopotentials for lanthanoid atoms with fixed valency are presented and tested in molecular calculations for CeO, CeF, EuO, GdO, YbO, and YbF. The pseudopotential calculations treat the lanthanoid 4f shell as part of the core and yield accurate estimates for average bond lengths, vibrational frequencies and dissociation energies of all states belonging to a superconfiguration. Information for each individual state of the considered superconfiguration may be obtained from subsequent ligand field model calculations. The results of this combined pseudo-potential and ligand field approach (PPLFT) are compared to more accurate calculations with ab initio pseudopotentials that include the lanthanoid 4f orbitals explicitly in the valence shell and to available experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01112983
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Energy-adjustedab initio pseudopotentials for the second and third row transition elements (1990)
    Springer
    Theoretical chemistry accounts 77 (1990), S. 123-141 
    Details
    ISSN: 1432-2234
    Keywords: Pseudopotentials ; Spin-orbit operator ; Transition metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Nonrelativistic and quasirelativisticab initio pseudopotentials substituting the M(Z−28)+-core orbitals of the second row transition elements and the M(Z−60)+-core orbitals of the third row transition elements, respectively, and optimized (8s7p6d)/[6s5p3d]-GTO valence basis sets for use in molecular calculations have been generated. Additionally, corresponding spin-orbit operators have also been derived. Atomic excitation and ionization energies from numerical HF as well as from SCF pseudopotential calculations using the derived basis sets differ in most cases by less than 0.1 eV from corresponding numerical all-electron results. Spin-orbit splittings for lowlying states are in reasonable agreement with corresponding all-electron Dirac-Fock (DF) results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01114537
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    An application of correlation energy density functionals to atoms and molecules (1986)
    Springer
    Theoretical chemistry accounts 70 (1986), S. 407-419 
    Details
    ISSN: 1432-2234
    Keywords: Correlation energy ; Density functional ; First-row atoms ; First-row hydrides ; First-row dimers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Four density functionals — including that recently introduced by Perdew ((1986) Phys Rev B33: 8822)—are tested for first-row atoms, hydrides and dimers. Calculated contributions of the correlation energy to the ionization potentials and electron affinities of atoms and to the dissociation energies of molecules are compared with “empirical” values which were reevaluated for this purpose. An improvement over Hartree-Fock is found in all cases if the self-interaction or the gradient correction are included in the density functional, although there is a rather large variation in the accuracy of the predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00531922
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Ein Zwillingsfall mit wahrscheinlicher Superfetatio (1980)
    Springer
    International journal of legal medicine 84 (1980), S. 319-321 
    Details
    ISSN: 1437-1596
    Keywords: Superfetation ; Disputed paternity, superfetation ; Superfetatio ; Abstammungsbegutachtung, Superfetatio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es wird über einen Zwillingsfall mit wahrscheinlicher Superfetatio (Überfruchtung) berichtet. Der Beklagte konnte aufgrund von Dominanzausschlüssen in den HLA-, GLO- und Ss-Merkmalsystemen als Vater des einen Zwillings ausgeschlossen werden, während seine Vaterschaft zum anderen Zwilling mit W = 99,995% als „praktisch erwiesen“ anzusehen ist. Eine Differenz von 450 g im Geburtsgewicht der Zwillinge, sowie die Aussage der Kindesmutter über Mehrverkehr, sprechen für das Vorliegen einer Superfetatio.
    Notes: Summary A twin case of disputed paternity with probable superfetation is reported. The putative father could be excluded as the father of Twin F by HLA, GLO, and Ss typing results, but could not be excluded as the father of Twin S, with a probability of paternity for this twin of 99.995%. A birth weight difference of 450 g and the evidence for additional sexual intercourses by the mother suggest the very rare event of a superfetation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02098755
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Über den Ablauf organisch-chemischer Reaktionen. Von S. Hauptmann. WTB, Wissenschaftl. Taschenbücher. Akademie-Verlag, Berlin 1963. 1. Aufl., 175 S., brosch. DM 12.50 (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 76 (1964), S. 279-279 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19640760622
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Die chemische Bindung in der Sicht der modernen theoretischen Chemie (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 77 (1965), S. 666-678 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ausgehend von den klassischen Vorstellungen werden die halbempirischen Ansätze zur Erfassung der chemischen Bindung kritisch diskutiert; im besonderen werden ihre Grenzen besprochen. Regeln, wie die über die Additivität der Bindungskonstanten und die Oktettregel, werden unter Berücksichtigung neuer chemischer Verbindungen geprüft. Dabei zeigt sich, daß diese Regeln zum Verständnis der chemischen Bindung nicht ausreichen, Diskrepanzen aufweisen und Vieldeutigkeiten enthalten; dies gilt auch für die Hybridisierungsvorstellung, deren Ausgangspunkte diskutiert werden. Im Rahmen der wellenmechanischen Betrachtung lassen sich einige allgemeingültige Aussagen über die chemische Bindung herausstellen. Dabei ergibt sich, daß die Hybridisierungsvorstellung sowie einige andere Regeln zu primitiv sind, um allgemein gültige Aussagen und Voraussagen über Bindungsprobleme zu erlauben, ja daß sie teilweise von falschen Voraussetzungen ausgehen; eine bessere Fundierung des Verständnisses der chemischen Bindung ist nur mit der Wellenmechanik denkbar, und auch möglich.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19650771504
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  • 9
    Electronic Resource
    Electronic Resource
    Die Stereochemie von Additionen an die Dreifachbindung (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 77 (1965), S. 679-679 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19650771506
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  • 10
    Electronic Resource
    Electronic Resource
    The Stereochemistry of Additions to Acetylenic Triple Bonds (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 689-689 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196506891
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    Paper (German National Licenses)
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