Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 6795-6796 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 53-57 
    ISSN: 0044-2313
    Keywords: Dilithium trihydrogen orthoperiodate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Li2H3IO6, a New Variant of the Molybdenite StructureLi2H3IO6 crystallizes in P61 (a = 529.70(8), c = 2 759.6(5) pm; Z = 6). The crystals are twinned by merohedry, described by m ‖ [001] and 2 ⊥ [001]. According to the results of an X-ray structure determination (2 778 diffractometer data, Rw = 0.047), Li2H3IO6 exhibits a layer structure, with oxygen forming a distorted variant of the sulfur partial structure in molybdenite (MoS2), however, with iodine and lithium in the more (Li) or less (I) distorted octahedral holes. The Li2IO6 packages are connected via strong hydrogen bonds along the edges of distorted trigonal prisms.
    Notes: Li2H3IO6 kristallisiert in der Raumgruppe P61 (a = 529,70(8), c = 2 759,6(5) pm; Z = 6). Die Kristalle sind merohedrisch verviellingt, beschrieben durch m ‖ [001] und 2 ⊥ [001]. Nach der Röntgenstrukturanalyse (2 778 unabhängige Reflexe, Rw = 0,047) liegt eine Schichtstruktur vor, in der die Sauerstoffatome eine verzerrte Variante der Schwefelteilstruktur von Molybdänit (MoS2) ausbilden, die Kationen besetzen die mehr (Li) oder weniger (I) verzerrten Oktaederlücken. Die Li2IO6-Schichtpakete werden entlang der Kanten der verzerrten trigonalen Prismen durch Wasserstoffbrückenbindungen miteinander verknüpft.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 805-808 
    ISSN: 0044-2313
    Keywords: Lithiumtetrahydrogenorthoperiodate monohydrate ; crystal structure ; tetrahydrogenorthoperiodate Ion ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Existence of the Tetrahydrogenorthoperiodate Ion. The Crystal Structure of LiH4IO6 · H2OThe crystal structure of LiH4IO6 · H2O has been determined (P1; a = 564.74(12), b = 574.41(13), c = 970.4(6) pm, α = 101.37(2), β = 96.37(2), γ = 114.72(2)°; Z = 2; 5 731 independent reflections; R = 0.038). All hydrogen-atoms were localized from difference fourier map and refined without applying constraints. Thus the existence of the tetrahydrogenorthoperiodate-ion in the solid state is proved, unambigously. The crystal structure is discussed and compared to other alkaliorthoperiodates.
    Notes: Die Kristallstruktur von LiH4IO6 · H2O wurde bestimmt (P1; a = 564,74(12), b = 574,41(13), c = 970,4(6) pm, α = 101,37(2), β = 96,37(2), γ = 114,72(2)°; Z = 2; 5 731 unabhängige Reflexe, R = 0,038). Alle Wasserstofflagen konnten aufgefunden und frei verfeinert werden und beweisen erstmals die Existenz des Tetrahydrogenorthoperiodations im Festkörper. Die Kristallstruktur wird diskutiert und mit denjenigen anderer Alkaliorthoperiodate verglichen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 307-316 
    ISSN: 0009-2940
    Keywords: Halogen oxides ; Solid-state structures ; Intermolecular interactions ; Halogens ; Oxygen ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The development of new preparative and analytical techniques that allow appropriate handling and characterizations of the capricious halogen oxides have initiated a revival of their chemistry. Due to these recent activities, the amount of well-confirmed knowledge about such oxides has considerably increased. This is especially valid for the structural chemistry in the solid state, which (among other topics) has greatly benefitted from developments in the techniques of in situ crystal growth of low melting substances on a diffractometer. As a consequence, some general crystal chemical features have become apparent: The coordination polyhedra of the halogen oxides can be readily understood in terms of the qualitative VSEPR concept, and there is a pronounced tendency to form mixed valence compounds where the respective valence states can be easily deduced from the coordination polyhedra. Furthermore, intermolecular or interionic bonds are significant, with increasing importance when moving from chlorine to iodine. Finally, ClO2 appears to be the only representative with the halogen in an even oxidation state.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2415-2419 
    ISSN: 0009-2940
    Keywords: Periodic acid, protonation of ; Hexahydroxoiodine(VII) cation ; Hexahydroxoiodine(VII) hydrogensulfate, bimorphism of ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Existence of the Hexahydroxoiodine(VII) Cation - Crystal Growth and Structure Analysis of α- and β-H6IO6HSO4*Periodic acid H5IO6 dissolves at 50°C in 90-97% H2SO4 to give the hexahydroxoiodine(VII) cation H6IO6+. Depending on the concentration of the sulfuric acid, two modifications of H6IO6HSO4 can selectively and reproducibly be precipitated. The crystal structures determinations prove the existence of H6IO6+ in the solid state. The crystal structures and Raman spectra of α-H6IO6HSO4 (1a) and β-H6IO6HSO4 (1b) are discussed and compared. The temperature-dependent behaviour of 1a and 1b is studied by means of DTA, temperature-dependent X-ray powder diffraction, and Raman spectroscopy.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0044-8249
    Keywords: Iod ; Metaperiodsäure ; Neutronenbeugung ; Strukturaufklärung ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 167-172 
    ISSN: 0044-2313
    Keywords: Iodine trioxide ; crystal structure ; Raman ; IR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal Growth, and Crystal Structure Determination of Iodine TrioxideFor the first time, pure and single crystalline iodine trioxide has been obtained and its identity proven by a crystal structure determination, unambigously. It forms at slow decomposition of orthoperiodic acid in concentrated sulfuric acid at 70°C during 3-6 weeks. The crystal structure (triclinic, P1; a = 500.6(2), b = 674.1(3), c = 679.5(3) pm, α = 97.31(3), β = 96.43(3), γ = 105.36(3)°; 1754 independent reflections, R = 0.064) contains one I4O12 molecule per unit cell. The oxide can be regarded as a mixed anhydride formed by condensation of two molecules H5IO6 and HIO3, each. The axial atoms in an I2O10 doubleoctahedron are bridged by two IO groups. The pointsymmetry is C2h. The molecules are connected via short intermolecular oxygen iodine bridges to form twodimensional infinite layers. The crystal structure thus represents an intermediate between molecular and polymeric.
    Notes: Erstmals wurde Jodtrioxid in reiner und einkristalliner Form erhalten und seine Identität durch Röntgenstrukturanalyse eindeutig belegt. Es bildet sich bei langsamer Zersetzung von Orthoperiodsäure in konzentrierter Schwefelsäure bei 70°C im Verlaufe von 3-6 Wochen. In der Kristallstruktur (triklin, P1; a = 500,6(2), b = 674,1(3), c = 679,5(3) pm, α = 97,31(3), β = 96,43(3), γ = 105,36(3)°; 1754 unabhängige Reflexe, R = 0,064) liegt pro Elementarzelle ein I4O12-Molekül vor, das als gemischtes Anhydrid aus je zwei Molekülen H5IO6 und HIO3 aufgefaßt werden kann. Die axialen O-Atome in einem I2O10-Doppeloktaeder werden von IO-Gruppen verbrückt. Die Punktsymmetrie ist C2h. Die Moleküle werden über relativ kurze intermolekulare Sauerstoff-Iod-Brücken untereinander zu zweidimensional unendlichen Schichten verknüpft; die Kristallstruktur weist also eine hybride Natur zwischen Molekülkristall und kollektivem Festkörper auf.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 484-487 
    ISSN: 0044-2313
    Keywords: Lithiummetaperiodate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of Lithiummetaperiodate, LiIO4For the first time single crystals of LiIO4 were obtained. According to the results of an X-ray structure determination (monoclinic, P21/n; a = 525.5(3), b = 851.1(4), c = 796.9(5) pm, β = 104.21(3)°; Z = 4; 2 148 diffractometer data, R = 0.024) the coordination by oxygen is tetrahedral for iodine and strongly distorted trigonal bipyramidal for lithium. Two lithium-oxygen-polyhedra are connected via a common edge. LiIO4 crystallises isostructural to LiAlH4. The structure is discussed and compared to those of other metaperiodates and tetrahydridoaluminates.
    Notes: Erstmals wurden Einkristalle von LiIO4 erhalten. Nach der Röntgenstrukturanalyse (monoklin, P21/n; a = 525,5(3), b = 851,1(4), c = 796,9(5) pm, β = 104,21(3)°; Z = 4; 2 148 unabhängige Reflexe, R = 0,024) wird Iod tetraedrisch und Lithium stark verzerrt trigonal-bipyramidal von Sauerstoff koordiniert. Dabei sind jeweils zwei Lithium-Sauerstoff-Polyeder miteinander kantenverknüpft. Es besteht Isotypie zu LiAlH4. Die Struktur wird diskutiert und mit denen anderer Metaperiodate und Tetrahydridoaluminate verglichen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0570-0833
    Keywords: iodine ; metaperiodic acid ; neutron diffraction ; structure elucidation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...