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  • Organic Chemistry  (4)
  • Thermogravimetry  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Electronic and magnetic structure of the polymeric system di-imidazolato iron(II) (1976)
    Springer
    Theoretical chemistry accounts 41 (1976), S. 223-232 
    Details
    ISSN: 1432-2234
    Keywords: Mössbauer spectroscopy ; Thermogravimetry ; Di-imidazolato iron(II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The polymeric system di-imidazolato iron(II) is synthesized from the reaction of either ferrocene or cyclopentadienyl-irondicarbonyl with imidazole. From Mössbauer measurements in the temperature range 4.2 K⩽T⩽448 K we find two different iron sites in the compound, denoted byA andB, respectively with ratio [A]/[B] = 1.79±0.03. From the isomer shift values we conclude that both Fe A and Fe B are in the ferrous high-spin state. Below 13.95±0.10 K both subspectra are considerably broadened due to magnetic ordering. From the analysis of the magnetic spectra we derive for the main componentV zz of the electric field gradient tensorV zz A 〉0 andV zz B 〈0. Additionally, we investigate the thermal decomposition of the compound by thermogravimetry in the temperature range 20 °C⩽T⩽ 750 °C and by Mössbauer spectroscopy in the temperature range 20 °C⩽T⩽505 °C. The decomposition takes place in four steps. The first step between 20 °C and 190 °C is due to the loss of imidazole nonbonded to iron(II). Comparing the amount of iron with that of pure imidazolato iron(II) we find the formula FeIz2+0.70 (±0.02) IzH, with Iz standing for doubly deprotonated and IzH for deprotonated imidazole. Step 2 (193 °C〈T〈235 °C) and step 3 (400 °C〈T〈500 °C) are found from both methods. Step 4 is above 500 °C. Heat treatment and vacuum conditions affect the thermal decomposition products. Isomer shifts δ A and δ B , and temperature dependent quadrupole splittings ΔE Q A and ΔE Q B are explained using a simple ligand field picture for orbital splittings and occupancies of quasi-tetrahedrally (A) and quasi-octahedrally (B) coordinated ferrous high-spin compounds. Using finally the experimental ratio [A]/[B] = 1.79 we derive for the over-all chemical formula (1.79 Fe A Iz4/2+Fe B Iz4/2+2 IzH) n = (FeIz2+0.71 Iz) −n in agreement with the result which we derived from investigating the thermal decomposition of our compound.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01151957
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  • 2
    Electronic Resource
    Electronic Resource
    Darstellung anorganischer Fluorverbindungen durch Spaltung von Sauerstoffbindungen mittels BenzoylfluoridsProf. Dr. Eugen Müller zum 60. Geburtstag gewidmet (1965)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 684 (1965), S. 1-4 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mit Benzoylfluorid lassen sich aus Oxyden sowie aus Anhydriden und Estern Fluorverbindungen des Bors, Siliciums und Phosphors darstellen. Diese präparativ wertvolle Reaktion wird an den Beispielen der Gewinnung von Bor- und Phosphortrifluorid sowie der Spaltung von Silikonen eingehender beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19656840102
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  • 3
    Electronic Resource
    Electronic Resource
    “Azolato”-metallate des Kobalts, Nickels, Kupfers und Zinks (1974)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1784-1788 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: “Azolato” Metalates of Cobalt, Nickel, Copper, and ZincThe cobalt(II), nickel, copper(II), and zinc derivatives (ML2) of imidazole, pyrazole, and 1.2.4-triazole (LH) exhibit an amphoteric behaviour. Comparable with that of metal hydroxides in yielding the corresponding “azolato”-metalates (in most cases [ML4)Na2) with the sodium compounds of the heterocycles in suitable solvents.
    Notes: Die Kobalt(II)-, Nickel-, Kupfer(II)- und Zink-Derivate (ML2) des Imidazols. Pyrazols und 1.2.4-Triazols (LH) zeigen ähnlich den Metallhydroxiden ein amphoteres Verhalten, indem sie mit den Natriumverbindungen der Heterocyclen in geeigneten Lösungsmitteln “Azolato”-metallate (vorzugsweise [ML4]Na2) bilden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197419741107
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  • 4
    Electronic Resource
    Electronic Resource
    Umsetzungen von Dimethylfluorphosphin mit Methylalkohol und Methylmercaptan (1972)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 756 (1972), S. 181-183 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Dimethylfluorophosphine with Methanol and MethanethiolDimethylfluorophosphine reacts readily with methanol and methanethiol to yield dimethyl-(methoxy)phosphine or dimethyl(methylthio)phosphine and dimethyldifluoroposphorane.
    Notes: Die in der Überschrift angegebenen Reaktionen führen sehr glatt zu Methoxyphosphin R2POR bzw. Methylmercaptophosphin R2PSR und Phosphoran R2PHF2 (R = CH3).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19727560120
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  • 5
    Electronic Resource
    Electronic Resource
    Über Pentafluoräthylate des Kaliums, Rubidiums und CäsiumsHerrn Professor Dr. Eugen Müller zum 70. Geburtstag gewidmet. (1975)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1700-1704 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentafluoroethoxides of Potassium, Rubidium and CesiumThe thermodynamic data for the reversible formation of pentafluoroethoxides of potassium, rubidium and cesium have been estimated by measuring the vapour pressures during thermal decomposition.
    Notes: Es wurden die thermodynamischen Daten der reversiblen Bildung von Pentafluoräthylaten aus Trifluoracetylfluorid und Kalium-, Rubidium- und Cäsiumfluorid durch Messung der sich bei der thermischen Zersetzung einstellenden Gasdrucke bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197519750917
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