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  • 1
    ISSN: 0044-2313
    Keywords: Palladium(II) disulfidechloride ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: PdSCl, a Molecular Palladium(II) Disulfidechloride with Octanuclear Pd8(S2)4Cl8 Groups and with Tetra Metal-coordinated bridging Disulfide GroupsBlack crystals of PdSCl have been obtained by reaction of Pd with S2Cl2 in closed quartz ampoules at 200°C. The compound is to be formulated as a Palladium(II)-disulfidechloride consisting of Pd8(S2)4Cl8 molecules with approximately D4h symmetry. In the octanuclear complexes Pd atoms form a cube, where bridging disulfide groups are found in front of 4 faces and μ2-bridging Cl atoms on 8 edges. In the monoclinic crystal structure (a = 8.763(2) Å; b = 9.082(2) Å; c = 13.662(4) Å; β = 91.748(23)°; V = 1086.8 Å3; Z = 16 PdSCl; Space gr. P21/n) the molecules form a cubic closed arrangement.
    Notes: Schwarze Kristalle von PdSCl wurden durch Umsetzung von Pd-Metall mit S2Cl2 in geschlossenen Ampullen bei 200°C erhalten. Die Verbindung ist ein Palladium(II)-disulfidchlorid, aufgebaut aus molekularen Pd8(S2)4Cl8-Gruppen mit annähernd D4h-Symmetrie. In den achtkernigen Komplexen bilden Pd-Atome einen Würfel mit S2-Gruppen vor vier Flächen und Cl-Atomen vor 8 Kanten. In der monoklinen Kristallstruktur (a = 8,763(2) Å; b = 9,082(2) Å; c = 13,662(4) Å; β = 91,748(23)°; V = 1086,8 Å3; Z = 16 PdSCl; Raumgr. P21/n) sind die Moleküle kubisch dichtest gepackt.
    Additional Material: 1 Ill.
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  • 2
    ISSN: 0044-2313
    Keywords: Bis(octaaquocalcium)-tridecachlorohexamercurate-tridecachloropentamercurate ; 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 2CaCl2 · 11HgCl2 · 16H2O, a Cubic Mercury-rich Chloromercurate with Icosahedral Hg6Cl13 and Hg5Cl13 GroupsThe mercury-rich chloromercurate 2CaCl2 · 11HgCl2 · 16H2O has been obtained by crystallization from concentrated aqueous solutions of CaCl2 and HgCl2 at room temperature. In the cubic crystal structure (a = 18.170(3) Å, space group F23, Z = 4) a three-dimensional framework is formed by Hg6Cl13- and Hg5Cl133- anions with large cavities, in which the dodecahedral Ca(H2O)82+ cations are accomodated. 96 out of 104 Cl atoms in the cell form a lattice complex cP2[12i] with 8 Cl12 icosahedra, which are centered by Cl atoms. In four of these Hg atoms are situated on 6 edges thus forming Cl(HgCl2)6- anions, while the remaining four icosahedra hold 3 Hg atoms on edges and two on faces. Here the central Cl- anions are coordinated by 3 HgCl2 and 2 HgCl3 groups. The Hg5Cl13 and Ca(H2O)8 polyhedra are crystallographically disordered.
    Notes: Das quecksilberreiche Chloromercurat 2CaCl2 · 11HgCl2 · 16H2O ist durch Kristallisation aus konzentrierten wäßrigen Lösungen von CaCl2 und HgCl2 bei Raumtemperatur zu erhalten. In der kubischen Kristallstruktur (a = 18,170(3) Å, Raumgr. F23, Z = 4) bilden Hg6Cl13-- und Hg5Cl133--Anionen ein Gerüst mit großen Hohlräumen, in denen sich Ca(H2O)82+-Kationen mit dodekaedrischer Konformation befinden. Von den 104 Cl-Atomen in der Zelle bilden 96 einen Bauverband cP2[12i] mit acht Cl12-Ikosaedern, die jeweils durch ein Cl-Atom zentriert sind. Bei vier der Ikosaeder befinden sich 6 Hg-Atome auf Kanten, so daß Cl(HgCl2)6--Anionen resultieren. Bei den Hg5Cl133--Anionen besetzen jeweils 3 Hg-Atome Kanten und 2 Hg-Atome Flächen der Ikosaeder, so daß die zentralen Cl--Anionen von 3 HgCl2- und 2 HgCl3-Gruppen koordiniert sind. Die Hg5Cl13- und Ca(H2O)8-Baugruppen sind kristallographisch fehlgeordnet.
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