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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 427-432 
    ISSN: 0009-2940
    Keywords: Chalcogenoboron hydride structure ; Adamantane ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: [(BH6)2]S4]2-, [(BH2)Se4]2-: New Chalcogenoboron Hydride Anions with Adamantane StructureThe reaction of THF·BH3/NaBH4 (2: 1) with H2S produces Na[H3B-μ2-S(B2H5)] (5) with hydrogen evolution. 5 reacts with an excess of H2S to give Na2[(BH2)6S4] (3a), which is also formed in the reaction of THF·BH3 with NaSH or anhydrous Na2S. These reactions proceed via 5 and the intermediates 7 or 8 by loss of BH-4 and cyclization. The analogous compound Na2[(BH2)6Se4] (4a) is obtained by the reaction of elemental selenium with NaBH4 (1:1) in triglyme. The primary product is Na2[H3B-Se-Se-BH3] (9). Treatment of 9 at 100 - 110°C yields 4a and polymers, 3a and 4a react with CsBr to form the crystalline compounds Cs2[(BH2)6Se4]·CsBr (3b) and Cs2-[(BH2)6Se4]·CsBr (4b), characterized by X-ray structure determinations. The anions of 3b and 4b consist of an adamantane skeleton. The Br- ion is octahedrally coordinated by Cs+ ions. The Cs6Br octahedra share faces to form columns along the hexagonal c axis. The crystal structures of the isotypic compounds 3b and 4b are closely related to the structure of CsNiCl3.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 612 (1992), S. 56-62 
    ISSN: 0044-2313
    Keywords: 1λ5,3λ5-diphosphete ; addition compounds with GeCl2, SnCl2, (CO)5W(Z-cyclooctene) ; n.m.r., i.r., mass spectra ; X-ray structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphete as Ligand in Coordination Compounds1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphete, 1, reacts with GeCl2 · 1,4-dioxane, SnCl2, and (CO)5W(Z-cyclooctene) to give the complexes {HCP[N(CH3)2]2}2 · GeCl2, 3, {HCP[N(CH3)2]2}2 · SnCl2, 4, and {HCP[N(CH3)2]2}2 · W(CO)5, 5, respectively. The n.m.r., mass, and i.r. spectra of the new compounds as well as the crystal and molecular structures of 3 and 4 are reported and the bonding situation in compounds 3-5 is discussed.
    Notes: 1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphet, 1 bildet mit GeCl2 · 1,4-Dioxan, SnCl2 bzw. (CO)5W(Z-cycloocten) die komplexe {HCP[N(CH3)2]2}2 · GeCl2, 3, {HCP[N(CH3)2]2}2 · SnCl2, 4, bzw. {HCP[N(CH3)2]2}2 · W(CO)5, 5. Die NMR-, Massen- und IR-Spektren der neuen Verbindungen sowie die Kristall- und Molekülstruktur von 3 und 4 werden mitgeteilt und die Bindungsverhältnisse in den Verbindungen 3-5 diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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