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  • Inorganic Chemistry  (251)
  • Biochemistry and Biotechnology  (39)
  • Crystal structure  (13)
  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Über ein neues Oxoiridat(IV): Ba7Ir6O19 (1989)
    Springer
    Monatshefte für Chemie 120 (1989), S. 705-710 
    Details
    ISSN: 1434-4475
    Keywords: Barium ; Iridium ; Oxygen ; Crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The so far unknown compound Ba7Ir6O19 was prepared by long time solid state reactions using a flux of BaCl2. X-ray single crystal work lead to the space group C 2h 3 —C2/m;a=14.913;b=5.778;c=10.979 Å; β=99.58°;Z=2. It crystallizes with a new structure type characterized by three face-shared octahedra. The Ir3O12-groups build up a threedimensional network with an incorporated Ba/O-frame.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809961
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  • 3
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur des Calciumazid-Dihydrates (1988)
    Springer
    Monatshefte für Chemie 119 (1988), S. 921-927 
    Details
    ISSN: 1434-4475
    Keywords: Azide ; Calcium ; Crystal structure ; Dihydrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Single crystals of Ca(N3)2·2 H2O have been prepared from aqueous solutions at room temperature. The crystals are monoclinic,a=1 159.0 (3),b=614.2 (2),c=785.5 (2) pm, β=106.52 (2)°,Z=4, space group P21/n. The crystal structure was determined by single crystal X-ray diffraction (1 109 Mo-Kα-reflexions,R=0.052). Calcium atoms are surrounded by four azide groups and four water molecules. The coordination polyhedra are antiprism which are sharing azide groups and water molecules to form layers. The lattice constants and powder pattern agree well with values reported earlier for Ca(N3)2 · 1.5 H2O [1]. It was also shown, that Sr(N3)2 · 2 H2O is isotypic with Ca(N3)2 · 2 H2O.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810101
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  • 4
    Electronic Resource
    Electronic Resource
    Crystal structure and conformation of 10-aryl-bilatrienes-abc (1991)
    Springer
    Monatshefte für Chemie 122 (1991), S. 749-758 
    Details
    ISSN: 1434-4475
    Keywords: Bile pigments ; Linear tetrapyrroles ; Bilatriene-abc ; Crystal structure ; Aryl-bilatriene-abc ; Aetiobiliverdin-IVγ
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird über Kristallstrukturbestimmungen von Aetiobiliverdin-IVγ (1) sowie zweiermeso-substituierter Arylbilatriene-abc (dem 2-Imidazolylderivat2 und dem 4-Nitrophenylderivat3) berichtet. Alle drei Moleküle liegen im Kristall in einerZ,Z,Z Konfiguration vor und nehmen eineall-syn-Konformation ein, woraus sich eine helikale Molekülgestalt ergibt. Als Folge der sterischen Abstoßung zwischen dem Arylsubstituenten und den beiden Methylgruppen an den Positionen 8 und 12 sind die Ganghöhe und die Krümmung der Helix in den beidenmeso-substituierten Derivaten2 und3 gegenüber1 vergrößert. Die Kristallpackung wird in den drei Kristallstrukturen bestimmt durch die Ausbildung S-förmiger, zentrosymmetrischer Dimeren, die durch zwei intermolekulare Wasserstoffbrücken zwischen dem pyrrolischen Wasserstoffatom und dem Carbonylsauerstoff von Ring A zweier zentro-symmetrieäquivalenter Moleküle zusammengehalten werden.
    Notes: Summary Crystal structure determinations of etiobiliverdin-IVγ (1) and of twomeso-substituted arylbilatrienes-abc (the 2-imidazolylderivative2 and the 4-nitrophenylderivative3) are reported. All three molecules have aZ,Z,Z configuration and occur in the crystal in anall-syn conformation, which results in a helical overall molecular shape. As a consequence of the steric repulsion between the aryl substituent and the two methyl groups on positions 8 and 12, the pitch and the curvature of the helix are larger in the twomeso-substituted derivatives2 and3 compared to1. In each structure, the packing is dominated by the formation of centrosymmetric, S-shaped dimers via two hydrogen bonds between the pyrrolic H-atom and the carbonyl oxygen of ring A of two molecules related by the operation of an inversion center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811476
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  • 5
    Electronic Resource
    Electronic Resource
    Röntgenstrukturanalyse des Methyl-5-acetylamino-7,8-anhydro-4,9-bis-O-(t-butyldimethylsilyl)-3,5-didesoxy-L-glycero-β-D-galakto-2-nonulopyranosidon-säuremethylesters (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 1105-1111 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure ; Oxiranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An X-ray crystal structure analysis of the title compound was carried out at −168°C in order to assign the stereochemistry around the oxirane: C25H49NO8Si2, trigonal, R3,a=25.18(1),c=13.55(1) Å (hexagonal axes),Z=9,d x =1.105. The structure was solved with direct methods and refined to anR-factor of 0.086.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00905464
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Kristallstruktur von Sulfamid, SO2(NH2)2 (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 427-433 
    Details
    ISSN: 1434-4475
    Keywords: Sulfamide ; Crystal structure ; Anisotropic extinction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray crystal structure analyses of sulfamide were carried out at 293 K and at 100 K:M=96.10, orthorhombic, Fdd2,Z=8,F(000)=400, Mo Kα, λ=0.71069 Å (graphite monochromator). A) 293 K:a=9.127 (1) Å,b=16.857 (5) Å,c=4.579 (1) Å,V=704.50 Å3,d x =1.812 Mgm−3, μ=0.648 mm−1,R=1.77%,R w =1.94% (384 reflections, 33 parameters). B) 100K:a=9.059 (1) Å,b=16.780 (8) Å,c=4.517 (1) Å,V=686.63 Å3,d x =1.859 Mgm−3, μ=0.665 mm−1,R=1.78%,R w =1.95% (404 reflections, 33 parameters). The sulfamide molecule shows at 293 K S-O and S-N distances of 1.429 (1) Å and 1.620 (1) Å, respectively, which are in agreement with IR data. Hydrogen positions could be determined from differenceFourier syntheses. Strong weakening of some intense low order reflections by extinction was observed, their anisotropy depends on the crystal and on temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809925
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  • 8
    Electronic Resource
    Electronic Resource
    Präparation und Kristallstrukturanalyse von Ca(N3)2(C5H5N)2 (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 567-572 
    Details
    ISSN: 1434-4475
    Keywords: Azide ; Calcium ; Crystal structure ; Pyridine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Diazido-dipyridine-calcium was prepared by the reaction of Ca(N3)2 with pyridine. The crystals are tetragonal, space group I $$\bar 4$$ 2 m (121),N=2,a=699.7 (1),c=1 450.6 (5) pm. The crystal structure was determined by single crystal X-ray diffraction, 415 independent observed Mo-Kα-counter reflexions,R=0.049. The calcium atoms are sixcoordinated to four nitrogen atoms of azide groups and to two nitrogen atoms of pyridine. The coordination polyhedra are tetragonal bipyramids which are linked together by four azide groups to form sheets of composition Ca(N3)2. The pyridine rings are directed perpendicular to the sheets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809666
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  • 9
    Electronic Resource
    Electronic Resource
    Strontiumazid-Harnstoff, Sr(N3)2·OC(NH2)2 Darstellung und Kristallstruktur (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 727-731 
    Details
    ISSN: 1434-4475
    Keywords: Azide ; Crystal structure ; Strontium ; Urea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Sr(N3)2 · OC(NH2)2 was prepared by the reaction of Sr(N3)2 with urea in aqueous solution. The crystals are monoclinic,a=12.993 (4),b=7.177 (1),c=7.896 (1) Å, β=98.98 (1)°, space group P 21/a,N=4. The crystal structure was determined by single crystal X-ray methods and refined toR w=0.086. The crystal structure consists of [SrN6O2]-antiprism which are linked to form layers parallel 001.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809222
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  • 10
    Electronic Resource
    Electronic Resource
    Kristallstruktur von Trisilber(I)amidosulfat Monohydrat, Ag3SO3N · H2O (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 947-954 
    Details
    ISSN: 1434-4475
    Keywords: Trisilver(I) amidosulfate monohydrate ; Crystal structure ; Planes of silver ; Penta coordinated nitrogen ; Colour of Ag(I) compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An X-ray crystal structure analysis of yellow Ag3SO3N · H2O was carried out at room temperature:M=435.69, monoclinic, P21/n,a=11.628 (5) Å,b=8.058 (4) Å,c=12.034 (5) Å, β=86.49 (3)°,V=1125.5 Å3,Z=8,d x =5.142 Mgm−3, MoKα, λ=0.71069 Å (graphite monochromator), μ=10.5 mm−1,R=5.44%,R w =5.85% (877 reflections, 118 parameters). The structure contains Ag planes with Ag-Ag distances shorter than in metallic silver. The nitrogen atoms of the SO3N anion are covalently bonded to 4Ag atoms of these Ag planes, thus assuming the extraordinary coordination number of 5. The five crystallographically independent Ag atoms forming the Ag planes have approximate linear N-Ag-N coordination. In addition, the structure contains two Ag atoms which are ionically coordinated to 4 resp. 5O atoms of SO3N and water. The colour-structure correlation of Ag(I) compounds with colourless anions is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00815321
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