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  • 1
    Electronic Resource
    Electronic Resource
    Chemisch-biologische Grundlagen der Unterdruck-Schädlingsbekämpfung („Vakuumbegasung“) (1938)
    Springer
    Naturwissenschaften 26 (1938), S. 732-736 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01774141
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthetic routes to the octahalogenoditechnetates [Tc2 X 8]2−,3− (X = Cl, Br), and normal coordinate analyses on the metal-metal multiple bond systems [Re2 X 8]2− (X = F, Cl, Br, I), [Tc2 X 8]2−,3− (X = Cl, Br)(D4h ), and [Os2 X 8]2− (X = Cl, Br, I)(D4d ) (1994)
    Springer
    Journal of cluster science 5 (1994), S. 83-106 
    Details
    ISSN: 1572-8862
    Keywords: Octahalogenoditechnetates(III, III) and -(II, III) ; octahalogenodirhenates(III, III) ; octahalogenodiosmates(III, III) ; normal coordinate analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Quick, facile, and high-yield syntheses of di- and trinegative octachloro- and octabromoditechnetates by reduction of tetrahalogenooxotechnetates(V) or hexahalogenotechnetates(IV) with tetrahydridoborate in organic solvents are described. The compounds are easily convertible by ligand exchange reactions. Under exclusion of air the octahaloditechnetates(lII, III) are stable in organic solvents and unstable in conc. hydrohalic acids, in contrast to the octahaloditechnetates(II, III) being stable in conc. hydrohalic acids and unstable in organic solvents. Based on a general valence force field, normal coordinate analyses on the metal-metal multiple bond systems [Re2 X 8]2− (X = F, Cl, Br, I), [Tc2 X 8]2−,3− (X = Cl, Br)(D4h ), including35Cl and37Cl labeled species, and [Os2 X 8]2− (X = Cl, Br, I)(D4d ) have been performed. With sets of seven or ten force constants very good agreement between observed and calculated frequencies has been achieved. The metal-metal valence force constants range from 2.7 to 4.9 mdyne/Å, the strength of the bonds depending on the bond order and the masses of the ligands. The bromo compounds in particular exhibit a strong vibrational coupling of the metal-metal stretching mode with the symmetric breathing vibration of the ligand sphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01165493
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Darstellung und Eigenschaften von Bis(tetra-n-butylammonium)-fluorophthalocyaninatohydrogenat-pentahydratProfessor Hanskarl Müller-Buschbaum zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 597 (1991), S. 133-144 
    Details
    ISSN: 0044-2313
    Keywords: Fluoro-phthalocyaninato hydrogenate ; u.v.-vis., i.r., r.r. spectra ; 1H, 13C, 19F n.m.r. spectra ; cyclovoltammetry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis und Properties of Bis(tetra-n-butylammonium)-fluoro-phthalocyaninato-hydrogenate-pentahydrateDarkgreen cubic crystals (a = 21.446(10) Å) of bis(tetra-n-butylammonium)-fluoro-phthalocyaninatohydrogenate-pentahydrate, (Bu4N)2[HFPc(2-)] · 5H2O, are prepared by the reaction of H2Pc(2-) with excess (Bu4N)F · 3H2O preferably in dichloromethane or pyridine. The thermal analysis shows two endothermic losses in weight corresponding to the evaporation of crystal water at T 〉 125°C and the decomposition of the complex salt giving H2Pc(2-) at T 〉 180°C, respectively. The electrochemical (cv) and spectroscopical properties (uv-vis, i.r., resonance Raman, 1H, 13C, and 19F nmr spectra) are investigated and the characteristic differences with those of H2Pc(2-) are discussed.
    Notes: Dunkelgrüne, kubische Kristalle (a = 21,446(10) Å) von Bis(tetra-n-butyl-ammonium)-fluoro-phthalocyaninatohydrogenat-pentahydrat, (Bu4N)2[HFPc(2-)] · 5H2O, werden durch die Umsetzung von H2Pc(2-) mit überschüssigem (Bu4N)F · 3H2O bevorzugt in Dichlormethan oder Pyridin dargestellt. Die thermische Analyse zeigt zwei endotherme Gewichtsverluste, die bei T 〉 125°C der Abgabe des Kristallwassers und bei T 〉 180°C der Zersetzung des Komplexsalzes unter Bildung von H2Pc(2-) entsprechen. Die elektrochemischen (CV) und spektroskopischen Eigenschaften (UV-VIS-, IR-, Resonanz-Raman-, 1H-, 13C- und 19F-NMR-Spektren) werden beschrieben und mit denen von H2Pc(2-) verglichen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915970116
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The Hexahydro-closo-hexaborate Dianion [B6H6]2- and Its Derivatives (1999)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 1831-1846 
    Details
    ISSN: 1434-1948
    Keywords: Hexahydro-closo-hexaborate ; Syntheses ; Protonation ; Non-rigidity ; Substitution reactions ; Derivatives ; Kinetics ; Degradation and expansion products ; Crystal structure data ; NMR data ; IR and Raman data ; Normal coordinate analyses ; ESR and electrochemical data ; Ab initio results ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: [B6H6]2- as the smallest known hydro-closo-borate is only moderately stable, and therefore its reaction chemistry remained unexplored for quite a long time. Since the mid 1980s some progress has been made in this field, and a considerable number of derivatives has been prepared. The provided structural and spectroscopic data together with the results of more sophisticated theoretical investigations by high level ab initio methods are a good basis for a systematic review on this class of compounds, and may encourage further synthetic and theoretical work. This is the aim of the present article giving a comprehensive survey up to the beginning of 1999.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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