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  • Lunar and Planetary Science and Exploration  (11)
  • Inorganic Chemistry  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 561-564 
    ISSN: 0009-2940
    Keywords: Norrish type II triplet diradical ; UV-Laser photochemistry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: UV-Laserphotochemie: Abfang des Norrish-Typ-II-Triplett-Diradikals 1-Hydroxy-4-methyl-1-phenyl-1,4-pentandiyl mit molekularem SauerstoffDie Lebensdauer des Triplett-Diradikals 2 (3ι = 131 ± 5 ns), erzeugt durch Laserphotolyse (334 nm) von 4-Methyl-1-phenyl-1-pentanon (1) in Methanol, wurde durch Abfang mit molekularem Sauerstoff bestimmt. Diese Lebensdauer stimmt mit dem durch Laserblitzphotolyse erhaltenen Wert (3ι = 97 ns) gut überein und belegt damit die Verläßlichkeit der Sauerstoff-Abfangtechnik. Das Abfangprodukt wurde durch eine unabhängige Synthese dargestellt und als 3-Hydroxy-1,2-dioxolan 9 identifiziert, das Ringtautomer des Hydroperoxids 6.
    Notes: The triplet lifetime (3ι = 131 ± 5 ns) of diradical 2, produced in the laser photolysis (334 nm) of 4-methyl-1-phenyl-1-pentanone (1) in methanol, was determined by dioxygen trapping. This lifetime agrees well with the value determined by laser flash photolysis (3ι = 97 ns), thereby establishing the reliability of the trapping technique. The trapping product was prepared by independent synthesis and characterized as 3-hydroxy-1,2-dioxolane 9, the ring tautomer of hydroperoxide 6.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 315 (1962), S. 235-240 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Darstellung und einige Eigenschaften des Bis(1,2,3-benzotriazolium)-hexacyano- ferrats(II), [H2(C8H4N2NH2)2][Fe(CN)6], werden beschrieben. Die thermogravimetrische Zersetzung dieser Verbindung deutet die Bildung mehrerer Zersetzungsprodukte an.
    Notes: The preparation and investigation of certain properties of dihydrogen di (1,2,3-benzotriazolatium)hexacyanoferrate(II), H2(C6H4N2NH2)2[Fe(CN) 6], are reported. The thermogravimetric analysis of this compound gives definite evidence of several other products formed during the course of the thermal decomposition of H2(C6H4N2NH2)2[Fe(CN) 6).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 321 (1963), S. 180-183 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird über die Bildung und Zusammensetzung schwerlöslicher Verbindungen berichtet, die durch Reaktion von 1,2,3-Benzotriazolhydrochlorid mit Cyanokomplexen von Übergangsmetallen entstehen.
    Notes: The chemistry of the interaction of 1,2,3-benzotriazole hydrochloride and negative cyanocomplexes of certain transition metals is reported and discussed.
    Additional Material: 1 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 321 (1963), S. 175-179 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es werden die Reaktionsmechanismen der Umsetzungen von Dihydrogen-di(1,2,3-benzotriazol)-hexacyanoferrat(II) mit Aminen, Tetramethylammoniumchlorid und Piperidin, die zu schwerlöslichen Niederschlägen führen, untersucht.
    Notes: The chemistry of the interactions of certain organic amines, tetramethylammonium chloride and piperidine with dihydrogen-di(1,2,3-benzotriazolatium)hexacyanoferrate(II) is reported.
    Additional Material: 1 Tab.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 318 (1962), S. 220-221 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Durch spektrophotometrische Untersuchung des orangeroten Reaktionsproduktes aus WOODs Reagens (s. „Summary“) und Eisen(III)-ionen wird auf ein Molverhältnis Reagens: Fe(III) = 2:1 geschlossen
    Notes: A spectrophotometric study has been made of the reddish-orange product formed in the interaction of the WOODs reagent, 2-hydroxymethyl-6(2′-hydroxymethyl-5′-hydroxy-4′-pyrone-6′)pyranyl[3,2-b]pyran-4,8-dione, with iron. Absorbance measurements by the mole ratio method gave definite evidence of a 2 to 1 mole tario product of the WOODs reagent to iron.
    Additional Material: 1 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 325 (1963), S. 119-121 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Durch spektrophotometrische Messungen wurde die Bildung von Komplexen im System Eisen(III)-Bis(2-Hydroxymethyl-5-hydroxy-4-pyron-6)keton untersucht. Im ersten Reaktionsschritt wird ein (1:1)-Komplex gebildet, danach sind ein (2:3)- und ein (1:2)-Komplex nachzuweisen.
    Notes: The interaction between iron(III) and bis(2-hydroxymethyl-5-hydroxy-4-pyrone-6)-ketone has been investigated by spectrophotometric methods. Continuous variation and mole ratio curves show evidence that 2:3 and 1:2 complexes are formed. The first step of the reaction involves the formation of an 1:1 complex.
    Additional Material: 2 Ill.
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  • 7
    Publication Date: 2017-10-02
    Description: The recent discovery of vast quantities of near-subsurface ice in both polar regions of Mars by the Mars Odyssey Gamma Ray Spectrometer (GRS) has presented us with an interesting quandary. On one hand, these deposits, found poleward of 60 deg in both hemispheres, are consistent with thermal models suggesting ice will be best protected in these regions during periods of high obliquity. On the other hand, the current paradigm regarding the placement of these deposits, i.e., diffusive deposition of water vapor, appears to be inconsistent with the large volume mixing ratios (approx. 90%) inferred from the GRS data. This incongruity argues that diffusion alone cannot be the primary mechanism for the creation of these reservoirs, and that an alternate, large-scale process should be considered.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Third International Conference on Mars Polar Science and Exploration; LPI-Contrib-1184
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  • 8
    Publication Date: 2017-10-02
    Description: Much of the interest in the polar regions centers on the fact that they likely contain the best record of Martian climate change on time scales from years to eons. This expectation is based upon the observed occurrence of weathering product deposits and volatile reservoirs that are coupled to the climate. Interpretation and understanding of these records requires understanding of the mechanisms that involve the exchange of dust, water, and carbon dioxide between the surface and atmosphere, and the atmospheric redistribution of these species. We will summarize our use of the GFDL Mars general circulation model (MGCM), to exploration aspects of the interaction between the global climate and the polar regions. For example, our studies have shown that while the northern polar cap is the dominant seasonal source for water, it can act as a net annual source or sink for water, depending upon the cap temperatures and the bulk humidity of the atmosphere. This behavior regulates the annual and global average humidity of the atmosphere, as the cap acts as a sink if the atmosphere is too wet and a source if it is too dry. We will then focus our presentation on the ability of the MGCM to simulate the observed diurnal variations of surface temperature. We are particularly interested in assessing the influence of dust aerosol and water ice clouds on simulated surface temperature and the comparison with observations. Surface thermal inertia and albedo are critical boundary inputs for MGCM simulations. Thermal inertia is also of intrinsic interest as it may be related to properties of the surface such as particle size and surface character.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Third International Conference on Mars Polar Science and Exploration; LPI-Contrib-1184
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  • 9
    Publication Date: 2017-10-02
    Description: The daily and seasonal variation of surface temperature is a central element in the description of martian climate. Surface thermal inertia and albedo are critical boundary inputs for simulating surface temperature in Mars general circulation models (MGCMs). Thermal inertia (TI) is also of intrinsic interest as it may be related to regolith properties such as particle size and surface character and so high spatial resolution is desirable. The recent mapping of TI at very high (0.25 deg) spatial resolution was achieved by fitting a thermal model to surface temperature observations obtained over a broad range of several martian years. However, varying atmospheric opacity (dust and water ice clouds) can significantly influence the estimated TI field and this effect was not fully compensated for. Opacity leads to an increase in morning temperature and a decrease in afternoon temperature, thus increasing the apparent thermal inertia.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 21; LPI-Contrib-1234-Pt-21
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  • 10
    Publication Date: 2018-06-08
    Keywords: Lunar and Planetary Science and Exploration
    Type: American Geophysical Union Annual Fall Meeting; San Francisco, CA; United States
    Format: text
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