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  • 1
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    Tetrasilvermesoperiodate, Ag4H2I2O10: Structure and Color Phenomenon (1994)
    Elsevier
    Details
    Publication Date: 1994-12-01
    Print ISSN: 0022-4596
    Electronic ISSN: 1095-726X
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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    PAPER CURRENT
  • 2
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    Force constants, vibrational assignment and equilibrium geometry for isocyanic acid (1976)
    Elsevier
    Details
    Publication Date: 1976-08-01
    Print ISSN: 0009-2614
    Electronic ISSN: 1873-4448
    Topics: Chemistry and Pharmacology , Physics
    Published by Elsevier
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Spectroscopical investigations on silver sulfamides (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 1321-1328 
    Details
    ISSN: 1434-4475
    Keywords: Charge transfer transitions ; Diffuse reflectance spectra ; Infrared spectra ; Silver sulfamides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die diffusen Reflexionsspektren (im Bereich von 700 bis 200 nm bei 300 K und 77 K) sowie die IR-Spektren (im SO2 und SN2-Valenzschwingungsbereich) von O2S(NHAg)2 und O2S(NAg2)2 werden mitgeteilt. Die niederenergetischen Banden in den diffusen Reflexionsspektren dieser diamagnetischen Verbindungen werden Charge-Transfer-Übergängen zugeordnet. Als Ursache für die Verschiebung der SO2-Valenzschwingungen einerseits sowie für die thermische und mechanische Instabilität andererseits wird eine Ladungsverschiebung aus dem S=O-Bereich über die Stickstoffatome zu den Silberatomen angenommen.
    Notes: Abstract Diffuse reflectance spectra (d.r.s.) of the diamagnetics O2S(NHAg)2 and O2S(NAg2)2 have been measured in the region from 700 nm to 200 nm at 300 K and 77 K, respectively. Additionally, infrared spectra in the region of the SO and SN stretching mode have been recorded. The energetically low-lying d.r.s. bands of these substances have been assigned to charge transfer transitions. The shift of the SO stretching modes together with the thermal and mechanical instability is thought to be due to a transfer of charge from the S=O bond regionvia the nitrogen atoms to the silver atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903658
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  • 4
    Electronic Resource
    Electronic Resource
    Kristallstruktur von Trimethylisocyanursäure, (CH3NCO)3, und von Trichlorisocyanursäure-1/2-Ethylenchlorid, (ClNCO)3·1/2C2H4Cl2 (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 1077-1085 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure ; Trimethyl isocyanuric acid ; Trichloro isocyanuric acid·1/2Ethylenechloride ; 1,3,5-Trimethyl-1,3,5-perhydrotriazine-2,4,6-trione ; 1,3,5-Trichloro-1,3,5-perhydrotriazine-2,4,6-trione·1/2 1,2-Dichloroethane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray crystal structure analyses of (CH3NCO)3 (M) and (ClNCO)3·1/2C2H4Cl2 (C) were carried out at room temperature (MoKα, graphite monochromator, λ=0.71069 Å): 1.M=171.16, monochlinic, P21/c,a=14.848 (1) Å,b=13.400 (2) Å,c=8.149 (1) Å, β=100.87 (1)°,V=1 592.3 Å3,Z=8,F(000)=720,d x =1.428 Mgm−3, μ=76m−1,R=6.51%,R w =7.01% (964 reflections, 218 parameters). 2.M=281.89, monochlinic, P 21/c,a=9.416 (3) Å,b=5.728 (1) Å,c=18.199 (8) Å, β=98.64 (2)°,V=970.4 Å3,Z=4,F(000)=556,d x =1.929 Mgm−3, μ=1.11 mm−1,R=3.96%,R w =3.44% (605 reflections, 132 parameters). The ring systems together with the C atoms of the methyl groups in (M) and with the Cl atoms in (C) are planar and have D3h-symmetry. Bond lengths and bond angles are discussed with regard to14N-NQR,35Cl-NQR and vibrational spectroscopic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811281
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  • 5
    Electronic Resource
    Electronic Resource
    1,3,5-Triazin-2,4,6-trisulfenyltrichlorid: Schwingungsspektren und Molekülstruktur (1998)
    Springer
    Monatshefte für Chemie 129 (1998), S. 139-149 
    Details
    ISSN: 1434-4475
    Keywords: Keywords. 1 ; 3 ; 5-Triazine-2 ; 4 ; 6-trisulfenyltrichloride; Cyanuric fluoride; Cyanuric chloride; Cyanuric bromide; IR; Raman; Molecular structure.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary.  The IR, FIR, and Raman (solution and solid state) spectra of 1,3,5-triazine-2,4,6-trisulfenyltrichloride ((NCSCl)3) were investigated for the first time. It was possible to identify all fundamentals in the solid state spectra which were assigned on the basis of a planar molecular structure with C3h symmetry. On the other hand, the solution spectra reveal unambiguously the presence of a conformer of lower symmetry (Cs) in equilibrium with the C3h isomer. Calculations employing the density functional theory were performed (B3LYP/6–31G*). A comparative discussion of the vibrational spectra of (NCSCl)3 (C3h) with respect to those of cyanuric fluoride ((NCF)3), cyanuric chloride ((NCCl)3), and cyanuric bromide ((NCBr)3) reveal a significant dependence of the vibrational situation within the 6-membered heterocyclic ring system on the different substituents in 2,4,6-position. Some modes of 2,4,6-trihalogeno-1,3,5-triazines have been reassigned, e.g. the normal mode v 12 of 2,4,6-trifluoro-1,3,5- triazine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010150
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  • 6
    Electronic Resource
    Electronic Resource
    29Si- und13C-NMR-Untersuchungen zur Struktur persilylierter Urazole (1988)
    Springer
    Monatshefte für Chemie 119 (1988), S. 457-461 
    Details
    ISSN: 1434-4475
    Keywords: Molecular structure ; 29Si-NMR ; 13C-NMR ; Tris-trimethylsilylurazole ; Bis-trimethylsilyl-4-methyl-urazole ; Bis-trimethylsilyl-4-methyl-dithiourazole ; Tris-trimethylsilyl-cyanurate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The molecular structures of persilylated urazoles: tris-trimethylsilyl-urazole, bis-trimethylsilyl-4-methyl-urazole, bis-trimethylsilyl-4-methyl-dithio-urazole, and tris-trimethylsilyl-cyanurate have been determined by29Si-,13C-NMR and IR measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810426
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Kohlensäurederivate, 3. Mitt.: Neue Synthesen von Tris(trimethylsilyl) cyanurat,N-Chlorsulfinylimid und Chlorcyan (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 1211-1216 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Tris(trimethylsilyl)cyanurate (I) has been prepared in high yields by silylation of cyanuric acid with trimethylsilyl cyanide, as well as by the reaction of trichloroisocyanuric acid with trimethylsilyl cyanide or trimethylsilylsulfinylimide. The latter reactions, yielding Cl−CN and Cl−NSO resp. as the only by-products, are convenient methods for synthesizing these pseudohalogen-chloride compounds in a very pure state. Starting fromN-chlorocarbonyl isocyanateI is formed in high yields by a complex reaction with trimethylsilylsulfinylimide too. Based on IR, Raman and1H-NMR data the O-silyl structure ofI was confirmed. The formation of products with N-silyl or N,O-silyl structure was never observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00913022
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  • 8
    Electronic Resource
    Electronic Resource
    Correlation of colour and crystal structure for silver(I) compounds (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 529-532 
    Details
    ISSN: 1434-4475
    Keywords: Colour of silver(I) compounds ; Crystal structures of silver(I) compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine geometrische Analyse an 22 Kristallstrukturen von Ag(I)-Verbindungen mit „harten” Basen zeigt, daß sich die Farbe der Verbindungen mit steigender Anzahl von Silberatomen um die Donorzentren vertieft.
    Notes: Abstract A geometrical analysis on 22 crystal structures of Ag(I) compounds with “hard” bases demonstrates that the observed colour-changes from colourless to red depend on the number of Ag(I) atoms coordinating the donor atoms of the base.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901832
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  • 9
    Electronic Resource
    Electronic Resource
    Kristallstruktur von Monosilber(I)amidosulfat, AgSO3NH2 (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 19-23 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure ; Monosilver (I) amidosulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A crystal structure analysis of the colourless AgSO3NH2 was carried out at room temperature:M=203.95, orthorhombic, Pcab,a=7.809 (2) Å,b=8.067 (2) Å,c=11.682 (3) Å,V=735.9 Å3,Z=8,d x=3.681 Mgm−3,F(000)=760, Mo Kα, λ=0.71069 Å (graphite monochromator), μ=5.77 mm−1,R=4.36% (509 reflections, 56 parameters). The ionic structure shows approximate trigonal bipyramidal coordination around the Ag+-ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810036
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  • 10
    Electronic Resource
    Electronic Resource
    Kristallstruktur von Trisilber(I)amidosulfat-3-Ammoniak-2-Wasser, Ag3SO3N · 3NH3 · 2H2O (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 349-354 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure ; Colour of Ag(I) compounds ; Amidosulfates ; Trisilver(I) amidosulfate-3-ammonia-2-water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An X-ray crystal structure analysis of colourless Ag3SO3N · 3NH3 · 2H2O was carried out at room temperature:M=504.79, orthorhombic, P212121,a=6.275 (1) Å,b=11.826 (2) Å,c=14.299 (12) Å,V=1061.10 Å3,Z=4,d x=3.160 Mgm−3,F(000)=940, Mo Kα, λ=0.71069 Å (graphite monochromator), μ=5.60 mm−1,R=4.71%,R w=4.96% (982 reflections, 120 parameters). The structure consists of Ag ribbons; each Ag atom is linearly co-ordinated to two N atoms with distances corresponding to covalent Ag-N bonds; no Ag-O coordination is observed; the N atom of the SO3N group is surrounded by three Ag atoms; compared to amidosulfuric acid, the SO3N group shows significant deformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809945
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