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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 897-913 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Photoelectron Spectra and Molecular Properties, XLV. Sulfuric Acid Derivatives : Alkyl, /Vinyl, and Aryl Sulfones, S,S-Dialkylsulfoimides and Sulfuryl HalidesThe photoelectron (PE) spectra of the following sulfuric acid derivatives are discussed comparatively using qualitative MO models supported by modified CNDO calculations. The substituent effects  -  including the isoelectronic exchange S=O → S=NH and structural modifications  -  can be summarized in correlation diagrams and rationalized as perturbations of the ++ group.
    Notes: Die Photoelektronen(PE)-Spektren der folgenden Schwefelsäure-Derivate werden mit qualitativen MO-Modellen, gestützt auf modifizierte CNDO-Rechnungen, vergleichend diskutiert. Die Substituenten-Effekte - den isoelektronischen Austausch S=O → S=NH und Strukturänderungen eingeschlossen  -  lassen sich in Korrelationsdiagrammen zusammenfassen und als Störungen der -Gruppe betrachten.
    Additional Material: 11 Ill.
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  • 2
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Photoelectron Spectra and Molecular Properties, XXXV. Sulfoxides X2SO  -  Examples for the Usefulness of Correlation diagrams in the Discussion of Substituent Effects and of Geometric PerturbationsThe photoelectron (p. e.) spectra of the sulfoxides on comparison do not only help in the spectroscopic assignment, but render possible to set up correlation diagrams for the effects of the substituents X and of geometry changes. The qualitative MO models used in the discussion are supported by CNDO/2 calculations. Only within a crude approximation the „SO double bond“ might be considered as being isolated.
    Notes: Die Photoelektronen(PE)-Spektren der Sulfoxide liefern bei Vergleich nicht nur zahlreiche spektroskopische Zuordnungshilfen. sondern erlauben darüber hinaus. Einflüsse der Substituenten X sowie von Geometrieänderungen in Korrelationsdiagrammen zu erfassen. Die zur Diskussion verwendeten qualitativen MO- Modelle lassen sich durch CNDO/2-Rechnungen stützen. Es zeigt sich, daß die „SO-Doppelbindung“ kaum isoliert betrachtete werden kann.
    Additional Material: 4 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 3747-3755 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Gasphase Reactions, 31. Photoelectron Spectra of Methylidynephosphanes R — C ≡ PThe PE spectroscopic optimization of thermal decomposition reactions in the gaseous phase has been applied to the chloro[(trimethylsily)methylene]phosphane derivaties ((H3C)3Si)RC = PCI with R = C6H5. Si(CH3)3. In a short-path pyrolysis, (H3C)3SiCl is split off quantitatively at 1300 K. The methylidynephosphanes formed, (H3C)3Si — C ≡ P and C6H5 — C ≡ P, can be detected and characterized by comparison of their PE spectra with that of the stable tert-butyl derivative, (H3C)3C — C ≡ P.
    Notes: Die PE-spektroskopische Optimierung thermischer Zersetzungsreaktionen in der Gasphase wird auf die Chlor[(trimethylsilyl)methylen]phosphan-Derivate ((H3C)3Si)RC = PCl mit R = C6H5, Si(CH3)3 angewendet. In einer Kurzweg-Pyrolyse spaltet sich bei 1300 K quantitativ (H3C)3SiCl ab. Die gebildeten Methylidinphosphane (H3C)3Si — C ≡ P und C6H5—C ≡ P lassen sich durch einen Vergleich ihrer PE-Spektren mit dem des stabilen tert-Butyl-Derivates (H3C)3 — C ≡ P nachweisen und charakterisieren.
    Additional Material: 3 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 187-202 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Gas Phase Reactions, 40. Selenoformaldehyde: Highly Correlated Wave Function and Photoelectron Spectroscopic EvidenceA systematic search for the unknown molecule selenoformaldehyde, H2C = Se, starts with the precalculation of its ionization pattern from ab-initio-PNO-CI and CEPA wave functions. The selenium precursors H3CSeSeCH3, H3CSeCN, H3CSeCl, and (H2CSe)3 are pyrolyzed in a flow system under PE spectroscopic real-time analysis: Applying “computerized spectra stripping” to the PE spectra of the pyrolysis mixtures, an ionization pattern can be extracted which correlates satisfactorily with the quantum chemical prediction for H2C = Se. To further support the assignment, selenoacetaldehyde, CH3CH = Se, and selenocarbonyl difluoride, F2C = Se, are prepared by thermal monomerization of ((H3C)HCSe)3 and (F2CSe)2, respectively.
    Notes: Nach dem unbekannten Molekül Selenoformaldehyd, H2C = Se, wird systematisch gesucht, beginnend mit der Vorausberechnung seines Ionisationsmusters aus ab-initio-PNO-CI-und CEPA-Wellenfunktionen. Als Selen-Ausgangsverbindungen werden H3CSeSeCH3, H3CSeCN, H3CSeCl und (H2CSe)3 im Gasstrom unter PE-spektroskopischer Echtzeit-Analytik pyrolysiert: Aus den Pyrolysegemisch-Spektren läßt sich durch Spektren-Subtraktion mit Hilfe eines Rechners ein Ionisationsmuster herausschälen, das mit der quantenchemischen Voraussage für H2C = Se zufriedenstellend korreliert. Zur weiteren Stützung der Spektrenzuordnung werden Selenoacetaldehyd, CH3CH = Se, und Selenocarbonyldifluorid, F2C = Se, durch thermische Monomerisierung von ((H3C)HCSe)3 und (F2CSe)2 dargestellt.
    Additional Material: 7 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 315-320 
    ISSN: 0009-2940
    Keywords: λ5-Phosphoranes ; Photoelectron spectroscopy ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gas-Phase Reactions, 85[1]. - Preparation and Photoelectron Spectrum of Ethyldithioxo-λ5-phosphorane H5C2-P(=S)2The first alkyldithioxo-λ5-phosphorane 1a is obtained by selective monomerization of its readily accessible dimer, 2,4-diethyl-1,3,2λ5,4λ5-dithiadiphosphetane-2,4-dithione [4 (R = C2H5)], at 970 K in the gas phase and characterized by its photoelectron spectrum, which is assigned by both Koopmans' correlation and radical-cation state comparison with the halogen derivatives FPS2 (1b) and CIPS2 (1c).
    Additional Material: 5 Ill.
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  • 6
    ISSN: 0009-2940
    Keywords: Sterically overcrowded trialkylammonium salt ; Single-crystal structure ; Protonation-energy hypersurface calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Structures and Molecular Properties of Sterically Overcrowded Molecules 43[1].  -  Triisopropylammonium Chloride: Single-Crystal Structure and Calculations Concerning the Protonation of the p-Type Nitrogen Electron Pair[2]The protonation of triisopropylamine, which contains an almost planar NC3 skeleton of C3 symmetry and, therefore, a p-type N electron pair, with HCl in methanol causes severe structural perturbation due to extreme steric overcrowdedness: the single-crystal structure determination (orthorhombic Pbca, Z = 8) proves that the molecular symmetry is reduced to C5 by the rotation of one isopropyl group around its CN axis by almost 90° and the decrease of the angles CNC from 119° each to 115, 115 and 111°, respectively. The Cl⊖⃛(H)N hydrogen bond distance of 315 pm is presumably slightly increased by steric overlap of the van der Waals radii of Cl⊖ and one of the three adjacent methyl groups. The protonation of the p-type lone pair of triisopropylamine including the pyramidalization of the nitrogen centre and the twist of one isopropyl group can be simulated by a one-dimensional energy hypersurface calculation, if H⊕ attack outside the C3 axis is assumed.
    Additional Material: 2 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 88 (1976), S. 380-381 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 84 (1972), S. 944-945 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 85 (1973), S. 987-988 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 88 (1976), S. 381-382 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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