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  • Computational Chemistry and Molecular Modeling  (24)
  • Pseudopotentials  (4)
  • 31.15  (1)
  • Abstammungsbegutachtung, Superfetatio  (1)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 84 (1980), S. 319-321 
    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
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 77 (1990), S. 123-141 
    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
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  • 3
    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
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 85 (1993), S. 441-450 
    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
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 75 (1989), S. 173-194 
    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
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 349-355 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The C5H5- ion has been investigated ab initio in the equilibrium distance of the centers, taking all 36 electrons into account, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. A total energy of -189.42 a.u. and an ionization energy (electron affinity of C5H5) of 0.9 eV were found. A most significant result is that one π orbital is more strongly binding than four σ orbitals.
    Abstract: On présente un calcul ab initio de la molécule C5H5- pour la distance à l'équilibre des noyaux, basé sur Allgemeines Programmsystem/SCF-MO-LC (LCGO) Methode. Tous les 36 électrons ont été considérés. On trouve pour l'énergie totale -189.42 u.a. et pour l'énergie d'ionisation (l'affinité électronique de C5H5) 0.9 eV. L'une des orbitales π est plus liante que quatre des orbitales σ.
    Notes: Das C5H5- wird im Gleichgewichtsabstand der Zentren unter Berücksichtigung aller 36 Elektronen ab initio mit Hilfe des Allgemeinen Programmsystems/SCF—MO—LC(LCGO) Methode berechnet. Es ergibt sich eine Gesamtenergie von -189,42 a.E. Die Ionisierungsenergie (Elektronenaffinität des C5H5) beträgt 0,9 eV. Bei den Einteilchenenergien sind in energetischer Folge den π-Zuständen σ-Zustände eingelagert.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 357-359 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The C6H6 has been investigated ab initio for the equilibrium distance of the centers, taking into account all 42 electrons, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. A total energy of -227.27 a.u. and an ionization energy of 8.5 eV were found. Further one of the π orbitals was more strongly binding than some of the σ orbitals.
    Abstract: On présente un calcul ab initio de la molécule C6H6 pour la distance à l'équilibre des noyaux, basé sur Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. Tous les 42 électrons on été considérés. On trouve pour l'énergie totale -227.27 u.a. et pour l'énergie d'ionisation 8.5 eV. L'une des orbitales σ est plus liante que quelques-unes des orbitales π.
    Notes: Das C6H6 wurde im Gleichgewichtsabstand der Zentren unter Berücksichtigung aller 42 Elektronen ab initio mit dem Allgemeinen Programmsystem/SCF—MO—LC(LCGO) Methode berechnet. Es ergab sich eine Gesamtenergie von -227.27 a.E. und eine Ionisierungsenergie von 8.5 eV. Ferner wurde gefunden, dass den Einelektronen π-Zuständen in energetischer Reihenfolge σ-Zustände eingelagert sind.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 361-364 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The C3H6 has been investigated ab initio, taking all 24 electrons into account, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. Variation of the C—C distance gives a total energy of -116.02 a.u. at a C—C distance of 2.91 a.u. The ionization energy was found to be 10.33 eV.
    Abstract: On présente un calcul ab initio de la molécule C3H6 basé sur Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. Tous les 24 électrons on été considérés. Variant la distance C—C on obtient l'énergie totale -116.02 u.a. pour la distance C—C 2.91 u.a. L'énergie d'ionisation correspondante est 10.33 eV.
    Notes: Das C3H6 wurde unter Berücksichtigung aller 24 Elektronen ab initio mit dem Allgemeinen Programmsystem/SCF—MO—LC(LCGO) Methode berechnet. Es ergab sich nach Variation des C—C Abstandes ein Minimum der Gesamtenergie von -116.02 a.E. bei einem C—C Abstand von 2.91 a.E. Die Ionisierungsenergie wurde zu 10.33 eV bestimmt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 365-368 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The C2H4 was investigated ab initio for the equilibrium distance of the centers, taking all 16 electrons into account, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. A total energy of -76.77 a.u. and an ionization energy of 10.55 eV were found.
    Abstract: On présente un calcul ab initio de la molécule C2H4 pour la distance à l'équilibre des noyaux, basé sur Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. Tous les 16 électrons ont été considérés. On trouve, pour l'énergie totale -76.77 u.a. et pour l'énergie d'ionisation 10.55 eV.
    Notes: Das C2H4 wird im Gleichgewichtsabstand der Zentren unter Berücksichtigung aller 16 Elektronen ab initio unter Verwendung des Allgemeinen Programmsystem/SCF—MO—LC(LCGO) Methode berechnet. Es ergibt sich eine Gesamtenergie von -76.77 a.E. Die Ionisierungs-energie beträgt dabei 10.55 eV.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 369-372 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Using the results of ab initio calculations, by comparison of the “1s orbital energies” of the C atom in the compounds C6H6, C5H5-, C3H6 (cyclopropane), C2H4 as well as at the C atom itself the bond electrons were found to have a significant influence on the inner electrons. The reason for this is pointed out and an explanation is given. The connection between the bonding and this “1s orbital energy” change as well as the importance of this result for quantum-chemical “models” is discussed.
    Abstract: On compare les énergies des orbitales 1s de l'atome C libre et de l'atome C dans C6H6, C5H5-, C3H6 (cyclopropane), C2H4. On trouve une influence significative des électrons de valence sur les électrons de la couche intérieure. On discute la raison de cette influence et ses conséquences pour les modèles de la chimie quantique.
    Notes: Durch Vergleichen der “1s-Einteilchenenergien” an den C Atomen in den Verbindungen C6H6, C5H5-, C3H6 (Cyclopropan), C2H4 sowie am freien C Atom wird im Rahmen von ab initio - Rechnungen gezeigt, dass die inneren Elektronen von den Bindungsvorgängen wesentlich beeinflusst sind. Die Ursachen werden diskutiert und eine Erklärung dafür angegeben. Der Zusammenhang dieser Energieänderungen mit den Bindungsverhältnissen, sowie die Bedeutung dieser Tatsache für gewisse Modellvorstellungen werden besprochen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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