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Showing papers by "Bernt Krebs published in 1980"






Journal ArticleDOI
TL;DR: In this article, the molecular and crystal structures of S3N2+SO3CF3− · 1/2 CH3CN (1) and S3n2NSO2F (2) were determined from single crystal X-ray diffraction data.
Abstract: Die Rontgenstrukturanalysen von S3N2+SO3CF3−− 1/2 CH3CN (1) und S3N2NSO2F (2) zeigen in 1 ein planares S3N2+-Radikalkation, wobei zwei Kationen uber schwache S-S-Wechselwirkungen zu sesselformigen Dimeren assoziiert sind. Der an einem S-Atom der S S-Gruppe substituierte S3N2-Ring in 2 ist nicht planar; die S S-Bindung ist schwacher als in 1. Crystal and Molecular Structures of the S3N2+ Radical Cation in S3N2+SO3CF3− · 1/2 CH3CN and of S3N2(NSO2F) The molecular and crystal structures of S3N2+SO3CF3− · 1/2 CH3CN (1) and S3N2NSO2F (2) were determined from single crystal X-ray diffraction data. The S3N2+ radical cation in 1 is planar, two cations being connected through weak SS bonding interactions to form dimers with a chair configuration. The S3N2 ring of 2, in which the NSO2F group is covalently bonded to one of the S atoms of the S S group, is not planar; the S S bond is weaker than in 1.

32 citations



Journal ArticleDOI
TL;DR: In this paper, the existence of Pd5AlI2 was confirmed, the crystal structure of which was determined from a single crystal X-ray analysis, has a tetragonal layer structure with a = 405.2 and c = 1955.9 pm.
Abstract: Durch Schmelzsynthese und Temperung bei 600°C sowie durch Synthese in Gegenwart von Iod bei 600°C wurden rotgenographisch die neuen Phasen Pd2,4-2,9Al, Pd2,99-3,3Al und Pd3,8-4,15Al gefunden. Die gleichen Phasen ergaben sich im iodhaltigen System aus dem Zusammenhang von Gasphasenzusammensetzung und Bodenkorperstruktur. Die. Existenz von Pd5Al3 wurde bestatigt. Die neue Verbindung Pd5AlI2, deren Kristallstruktur aus Einkristall-Rontgendaten bestimmt wurde, besitzt ein tetragonales Schichtgitter mit a = 405,2 und c = 1955,9 pm, Raumgruppe I4/mmm, in dem Iodschichten und Pd/Al-Schichten miteinander abwechseln. Die Verbindung ist ein metallischer Leiter mit stark bevorzugter Leitfahigkeit in Richtung der Schichten. New PdxAly Phases and the Compound Pd5AII2 The new phases Pd2.4-2.9Al, Pd2.99-3.3Al, and Pd3.8-4.15Al were prepared by synthesis from molten mixtures and subsequent annealing at 600°C, or by reaction in the presence of iodine at 600°C, and were identified by X-ray powder diagrams. In the iodine-containing systems, the same phases resulted from the relation between composition of the gas phase and the structure of the solid reaction component. The existence of Pd5Al3 was confirmed. The new compound Pd5AlI2, the crystal structure of which was determined from a single crystal X-ray analysis, has a tetragonal layer structure with a = 405.2 and c = 1955.9 pm, space group I4/mmm. Iodine layers alternate with ordered Pd/Al slabs. The compound is a metallic conductor with highly preferred conductivity parallel to the layers.

22 citations


Journal ArticleDOI
TL;DR: In this paper, a rontgenstrukturanalyse der Verbindung (a = 10,744, b = 11,787, c = 12,179 A, α = 71,47°, β = 85,64°, γ = 72,28°, Raumgruppe P1, Z = 1) zeigt, das ein dimeres, aus kantenverknupften, verzerrten TeBr6-Oktaedern bestehendes Te2Br102−-I
Abstract: Wie das isotype Te4Cl16 kann auch das cubanartige Te4Br16 zu oligomeren und monomeren Halogenotelluraten(IV) abgebaut werden. [(C6H5)4P]2Te2Br10 entsteht bei der Reaktion von TeBr4 mit (C6H5)4PBr in Benzol/Acetonitril. Die Rontgenstrukturanalyse der Verbindung (a = 10,744, b = 11,787, c = 12,179 A, α = 71,47°, β = 85,64°, γ = 72,28°, Raumgruppe P1, Z = 1) zeigt, das ein dimeres, aus kantenverknupften, verzerrten TeBr6-Oktaedern bestehendes Te2Br102−-Ion vorliegt. Die TeBr-Bindungslangen betragen 2,530(2).2,698(2) A (Mittelwert 2,614 A) fur die endstandigen, 2,876(2) und 3,000(2) A (M.2,938 A) fur die Bruckenbindungen. Die stereochemische Aktivitat der inerten Elektronenpaare am Te ist nur gering. Uber die IR- und Raman-Spektren des Te2Br Br102−-Ions wird berichtet.

20 citations


Journal ArticleDOI
TL;DR: In this paper, the crystal and molecular structure of mercury(II) tetrathiocyanatobis(dimethylformamide)cobaltate (II) Hg(SCN)4Co(DMF)2 was determined from three-dimensional X-ray data collected by counter methods.

16 citations



Journal ArticleDOI
TL;DR: In this article, a new AB4-Strukturtyp is introduced, aus den Elementen in geschlossenem system with anschliessender Sublimation in Form orangeroter Einkristalle dargestellt wurde.
Abstract: Zusammenfassung HfI4, das aus den Elementen in geschlossenem System mit anschliessender Sublimation in Form orangeroter Einkristalle dargestellt wurde, bildet einen neuen AB4-Strukturtyp. Die Rontgenstrukturanalyse zeigt gewinkelte unendliche Ketten aus kantenverknupften HfI6-Oktaedern mit einer Identitatsperiode von vier Formeleinheiten (keine trans-Verknupfung), die sich grundsatzlich von den Kettenstrukturen des α-NbI4, ZrCl4 und ZrI4 unterscheiden. Die Hf-I-Bindungslangenliegen zwischen 2,678(2) und 3,007(2) A, die Hf…Hf-Abstande (4,377(2) A) schliessen erwartungsgemass Hf-HfBindungsanteile aus. Die Kristalldaten sind wie folgt: monoklin, Raumgruppe C2 c , a = 11,787(4) A , b = 11,801 (3) A , c = 12,905(4) A , β = 116,30(3)°, Z = 8 HfI 4 . Massenspektren zeigen, dass die Sublimation uber HfI4-Molekule erfolgt und dass sich keine Gaskomplexe zwischen AlI3 und HfI4 bilden. Die IR- und Ramanspektren von kristallinem HfI4 werden mitgeteilt.

Journal ArticleDOI
TL;DR: In this article, the crystal and molecular structure of dichloronicotinemercury (II) was determined from single crystal X-ray data collected by counter methods, and the structure was solved be heavy atom methods from 1338 reflections and was refined to an R index of 0.049.

Journal ArticleDOI
TL;DR: In this article, the synthesis of N(SCl)₂⁺ MF₆� (M = As, Sb) is reported, the structure of N (SCl)/AlCL₄⁻ is determined, and some of the spectroscopic properties of the NCl/AlCL cation are discussed.
Abstract: The synthesis of N(SCl)₂⁺ MF₆⁻ (M = As, Sb) is reported, the structure of N(SCl)₂⁺ AlCL₄⁻ is determined and some of the spectroscopic properties of the N(SCl)₂⁺ cation are discussed.


Journal ArticleDOI
TL;DR: The crystal structure of tetrameric copper (II) chloride-thiodiethanol, [CuClOC2H4SC2H 4OH]4 was determined from three-dimensional X-ray diffraction studies and was refined by least squares methods to R = 0.057 for 1837 reflections as mentioned in this paper.

Journal ArticleDOI
TL;DR: The structure of bis(3, 3′-thiopropionatopropionic acid) diaquocopper(II) was determined from single-crystal three-dimensional X-ray data collected by counter methods as mentioned in this paper.

Journal ArticleDOI
TL;DR: The triclinic niobium (V) iodide was prepared from the elements at an iodine pressure of 3-4 bar in a temperature gradient from 400 to 230 °C and crystallized in the space group P1̄ with a = 7.591, b = 10,322, c = 6.977, α = 90.93, β = 116.17, γ = 109.07, Z = 2 Nbls as mentioned in this paper.
Abstract: Abstract Triclinic niobium(V) iodide was prepared from the elements at an iodine pressure of 3-4 bar in a temperature gradient from 400 to 230 °C. It crystallizes in the space group P1̄ with a = 7.591(3), b = 10,322(3), c = 6.977(3) Å, α = 90.93(3), β = 116.17(3), γ = 109.07(3)°, Z = 2 Nbls. The single-crystal X-ray structure analysis shows the compound to contain dimeric Nb2I10 molecules with Nb-I bond lengths of 2.933 and 2.939(1) A for the bridge bonds and of 2.639···2.720(1) Å for the terminal bonds. The structure is isotypic with triclinic β-UCl5. The infrared spectrum indicates stretching vibrations at 148, 202, 214 and 242 cm-1 .

Journal ArticleDOI
TL;DR: In this paper, the crystal and molecular structure of dichlorobis(2,2′-thiodiethanol)cobalt(II) was determined from three-dimensional X-ray data collected by counter methods.

Journal ArticleDOI
TL;DR: The Titelverbindung (III) wurde durch Kondensation von S4N4Cl2 (I) mit dem Schwefeldiimid (II) dargestellt as mentioned in this paper.
Abstract: Die Titelverbindung (III) wurde durch Kondensation von S4N4Cl2 (I) mit dem Schwefeldiimid (II) dargestellt.