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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 649-652 
    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 (OH)- has been investigated ab initio for four different distances ROH taking all 10 electrons into account, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Method. The equilibrium distance ROH was estimated to be 1.82 a.u., the minimum of the total energy to be -75.305 a.u. and the ionization energy of (OH)- (electron affinity of OH) to be 2.29 eV. The force constant was computed to be k = 7.47 mdyn/Å with a frequency of ω = 3655 cm-1.
    Abstract: En tenant compte de tous les dix électrons on a fait des calculs pour l'ion (OH)- pour quatre distances nucléaires différentes. On trouve un minimum d'énergie de -75,305 u.a. pour la distance R = 1,82 u.a. L'énergie d'ionisation du (OH)- est 2,29 eV, la constante de force 7,47 mdyn/Å et la fréquence correspondante ω = 3655 cm-1.
    Notes: Das (OH)- wurde unter Berücksichtigung aller 10 Elektronen mit dem Allgemeinen Programmsystem/SCF—MO—LC(LCGO) Verfahren für 4 verschiedene Kernabstände berechnet. Es ergab sich ein Energieminimum bei einem Abstand von R = 1,82 a.E. mit einer Gesamtenergie von ∊ = -75,305 a.E. Für die Ionisierungsenergie des (OH)- (Elektronenaffinität des OH) ergab sich ein Wert von 2,29 eV. Die Kraftkonstante wurde zu k = 7,47 mdyn/Å bestimmt, die zugehörige Frequenz beträgt ω = 3655 cm-.
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 4 (1970), S. 529-532 
    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
    Notes: The systems C2H4F+ and C2H4CH3+ have been investigated by the SCF-MO-P (LCGO) method. It will be shown that the results agree with the empirical rule of Markownikoff. An explanation of the rule of Markownikoff is given by means of the computed results.
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 2 (1968), S. 707-713 
    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: Une surface d'énergie pour la réction intermoleculaire radical d'oxygène ⇌ radical de méthylène a été estimée dans le cadre de la méthode SCF-MO-LC(LCGO) pour une partie importante de la molécule α-Tocophérol (vitamine E). L'énergie totale du radical d'oxygène dépasse celle du radical de méthylene d'environ 49.6 kcal/Mol. La hauteur calculée de la barrière de potentiel entre les deux radicaux tautomères est 54.6 kcal/Mol. Pourla durée de vie du radical d'oxygène le calcul donne 5.3 sec.
    Abstract: An einem wesentlichen Teil des α-Tocopherol-Moleküls (Vitamin E) wird mit der SCF-MO-LC(LCGO)-Methode eine Energiefläche für die intramolekulare Radikalreaktion Sauerstoff-Radikal ⇌ Methylen-Radikal errechnet. Die Gesamtenergie des Sauerstoff-Radikals liegt um 49.6 kcal/Mol höher als die des Methylen-Radikals. Die Höhe des Potentialberges zwischen den beiden tautomeren Radikalformen beträgt 54.6 kcal/Mol. Die Lebensdauer des Sauerstoff-Radikals wurde zu 5.3 sec berechnet.
    Notes: An energy surface for the intramolecular radical reaction oxygen radical ⇌ methylene radical has been estimated on an important part of the α-Tocopherol molecule (Vitamin E), using the SCF-MO-LC(LCGO) method. The total energy of the oxygen radical is greater than that of the methylene radical by about 49.6 kcal/Mol. The height of the potential barrier between the two tautomeric radicals was calculated to be 54.6 kcal/Mol. The calculated life time of the oxygen radical was 5.3 sec.
    Additional Material: 4 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 1 (1967), S. 373-378 
    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 CH4 molecule has been investigated ab initio, for four different distances RC—H and one distortion of a triangle HCH about the equilibrium condition, taking all 10 electrons into account, using the Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode. The equilibrium distance RC—H was estimated to 2.053 a.u., the minimum of the total energy to -40.06 a.u., the heat of formation to 17.0 eV and the ionization energy to 14.8 eV. For the breathing force constant and the force constant of the twisting vibration a ω1 of 3139 cm-1 and a ω2 of 1865 cm-1 were found.
    Abstract: On présente un calcul ab initio de la molécule CH4, basé sur Allgemeines Programmsystem/SCF—MO—LC(LCGO) Methode, pour tous les 10 électrons, quatre distances différentes C—H et pour une distorsion d'un triangle HCH. On trouve pour la distance à l'équilibre C—H 2.053 u.a., l'énergie totale -40.06 u.a., l'énergie de formation 17.0 eV, l'énergie d'ionisation 14.8 eV, la constante de force des vibrations de pulsation 3139 cm-1 et la constante de force des vibration de torsion 1865 cm-1.
    Notes: Das CH4 wurde unter Berücksichtigung aller 10 Elektronen mit dem Allgemeinen Programmsystem/SCF—MO—LC(LCGO) Methode für 4 verschiedene Abstände RC—H und für die Verdrillung eines Dreieckes HCH gegenüber der Gleichgewichtslage (s. Abbildung 1) berechnet. Es ergab sich im Minimum eine Gesamtenergie von -40.06 a.E., eine Bildungsenergie von 17.0 eV und eine Ionisierungsenergie von 14.8 eV. Der Bindungsabstand wurde zu RC—H = 2.053 a.E. bestimmt. Die sich ergebenden Kraftkonstanten lieferten die Frequenzen ω1 = 3139 cm-1 und ω2 = 1865 cm-1.
    Additional Material: 1 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 3 (1969), S. 873-879 
    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
    Notes: The system C2H5+ has been investigated as ethyl cation and as protonated ethylene using the SCF-MO-LC(LCGO) method. Equilibrium distances and angles have been estimated by different potential curves. No difference in total energy was found between the π- and the σ-complex.
    Additional Material: 4 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 3 (1969), S. 889-891 
    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
    Notes: 2-butene has been investigated for different nuclear positions taking all 32 electrons into account, using the SCF-MO-LC(LCGO) method. The calculations show that the energy of the trans-form is 1.1 kcal/mol lower than that of the cis-form. The potential curve between these two forms is shown graphically. The ionization energy was estimated to be 9.0 eV.
    Additional Material: 1 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 3 (1969), S. 115-121 
    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
    Notes: The wave function of the HeHHe+ molecule has been calculated by means of the GENERAL SCF-MO-LC(LCGO) PROGRAM SYSTEM, taking all four electrons into account. The calculations were carried out for a number of linear equidistant, linear non-equidistant, and bent nuclear arrangements. The minimum energy of -5.7930 a.u. was found for a linear equidistant configuration with a He—H distance of 0.939 Å. The corresponding ionization energy was 37.9 eV. An estimation of the energy of formation of HeHHe+ from HeH+ and He based on SCF-calculations on HeH+ and He gave 7.9 kcal/mole. The frequencies of the normal vibrations were calculated.
    Additional Material: 2 Tab.
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 2 (1968), S. 159-163 
    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: On a étudié les systèmes Be2H+ et Be2H- pour des positions nucléaires différentes, avec l'atome H situé entre les deux atomes Be. Tous les électrons ont été considérés et on s'est servi du système Allgemeinen Programmsystem/SCF-MO-LC(LCGO) Verfahren. Pour le Be2H+ on obtient une énergie totale minimum de -29,3824 u.a. dans la configuration linéaire avec une distance de liaison de 1,609 Å et avec une énergie d'ionisation de 12,37 eV. La formation du Be2H+ peut ětre interprétée comme une addition d'un Be au BeH+ avec une chaleur de réaction exotherme de 7,0 kcal/mole. L'affinité électronique du BeH+ (l'énergie d'ionisation du BeH) approximative est 7,24 eV. Toutes les constantes de force du Be2H+ et du BeH+ ont été calculées. Des résultats SCF il découle que le Be2H- n'est pas stable.
    Abstract: Die Systeme Be2H+ und Be2H- wurden unter Berücksichtigung aller 8 bzw. 10 Elektronen mit dem Allgemeinen Programmsystem/SCF-MO-LC(LCGO) Verfahren für verschiedene Kernlagen berechnet, wobei das H-Atom zwischen den Berylliumatomen lag. Beim Be2H+ ergab sich das Minimum der Gesamtenergie zu -29,3824 a.E. bei einer linear symmetrischen Lage und einem RBe—H-Abstand von 1,609 Å; die Ionisierungsenergie betrug dabei 12,37 eV. Die Bildung von Be2H+ kann durch eine Anlagerung von Be an BeH+ verstanden werden, wobei ungefähr 7,0 kcal/mol frei wird und keine Aktivierungsenergie notwendig ist. Die Elektronenaffinität von BeH+ (Ionisierungsenergie von BeH) konnte zu 7,24 eV abgeschätz werden. Daneben wurden sämtliche Kraftkonstanten von Be2H+ und BeH+ berechnet. Nach den SCF-Rechnungen ergibt sich das Be2H- als nicht stabil.
    Notes: The systems Be2H+ and Be2H- have been investigated for different nuclear positions, the H atom being situated between the Be atoms, taking all electrons into account, using the Allgemeines Programmsystem/SCF-MO-LC(LCGO) Verfahren. For Be2H+ there results a minimum total energy of -29.3824 a.u. in the linear symmetric configuration with a bond distance of 1.609 Å. The ionization energy was estimated to be 12.37 eV. The formation of Be2H+ can be interpreted as an addition of Be to BeH+ with an exotherm heat of reaction of 7.0 kcal/mole. The electron affinity of BeH+ (ionization energy of BeH) was estimated to be approximately 7.24 eV. All force constants of Be2H+ and BeH+ have been computed. Using SCF results, the Be2H- was found to be unstable.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 3 (1969), S. 881-887 
    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
    Notes: The ethylene molecule has been investigated by means of the General SCF-MO-LC(LCGO) Program System for 12 different nuclear positions, taking all electrons into account. The equilibrium distances and angles as well as all force constants of the totally symmetric vibrations with the corresponding frequencies have also been calculated.
    Additional Material: 4 Ill.
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