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  • 1
    ISSN: 0044-2313
    Keywords: Gold complexes ; preparation ; crystal structures ; ab initio Hartree-Fock calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Dimeric Gold Selenolates: Preparation and Characterization of [(n-C4H9)4N]2[AuSSeC = C(CN)2]2 and [(n-C4H9)4N]2[AuSe2C = C(CN)2]2The preparation and structural characterization of the dimeric AuI complexes of 1,1-dicyanoethene-2,2-thioseleonlate (i-mnts) and 1,1-dicyanoethene-2,2-diselenolate (i-mns), isolated as Bu4N salts, are described. They are isotype (monoclinic, space group P21/c, Z = 2) with lattice parameters: (Bu4N)2[Au(i-mnts)]2; a = 14.078(3) Å, b = 8.912(3) Å, c = 20.142(4) Å, β = 106.32(5)°; (Bu4N)2[Au(i-mns)]2; a = 13.998(3) Å, b = 9.125(3) Å, c = 20.039(2) Å, β = 105.12(5)°. Ab initio Hartree-Fock calculations based on the experimentally determined structure yield a positive value of the Au—Au bonding order suggesting weak bonding interactions between the d10 metal centres.
    Notes: Die Darstellung und Strukturaufklärung der als Bu4N-Salze (Bu = n-C4H9) isolierten dimeren AuI-Komplexe des 1,1-Dicyanoethen-2,2-thioselenolats (i-mnts) und des 1,1-Dicyanoethen-2,2-diselenolats (i-mns) werden beschrieben. Sie kristallisieren zueinander isotyp (monoklin, Raumgruppe P21/c, Z = 2) mit folgenden Gitterkonstanten: (Bu4N)2[Au(i-mnts)]2; a = 14,078(3) Å, b = 8,912(3) Å, c = 20,142(4) Å β = 106,32(5)°; (Bu4N)2[Au(i-mns)]2; a = 13,998(3) Å, b = 9,125(3) Å, c = 20,039(2) Å, β = 105,12(5)°. Ab-initio-Hartree-Fock-Rechnungen unter Zugrundelegung der experimentell bestimmten Geometrie mit Kristallfeldsimulation liefern einen positiven Wert der Au—Au-Bindungsordnung, der darauf hindeutet, daß der kurze Au—Au-Abstand (2,810(1) äR) auf schwache bindende Wechselwirkungen zwischen den d10-Metallzentren zurückgeführt werden kann.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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