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  • 1
    ISSN: 1573-9171
    Keywords: dicyclopentadienyl complexes of yttrium and lutetium ; hydride ; σ-naphthyl ligand
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The reaction of Cp2LuCl with sodium naphthalenide gives an anionic hydride complex [(Cp2LuH)3H][Na(THF)6] (1) and complex Cp2Lu(2-C10H7)(THF) (2) containing a σ-bonded naphthyl ligand. The structure of1 was confirmed by X-ray analysis. When Cp2YCl is used as the starting material, Cp3Y and an anionic hydride complex also containing a σ-naphthyl ligand are formed. A reaction mechanism involving the formation of an unstable complex [(Cp2Ln+)2(C10H2 8-)] (4) and its fragmentation into hydride and σ-naphthyl species is proposed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Organolanthanoide compounds; ; yttrium ; holmium ; IR ; NMR spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metallorganische Verbindungen der Lanthanoide. LXVI. Synthese und Röntgenstrukturanalyse von [O(CH2CH2C5H4)2Y(μ-OH)]2 und (MeC5H4)3Ho(H2O), zwei ungewöhnlichen Produkten der Hydrolyse von Organolanthanoide-VerbindungenBei der partiellen Hydrolyse von [O(CH2CH2C5H4)2]Y(C5H4CH3) 1, [O(CH2CH2C5H4)2]Y(C5H5) 3, und [O(CH2CH2C5H4)2]Ho(C5H4CH3) 5 bilden sich [O(CH2CH2C5H4)2)Y(μ-OH)]2 2, (C5H5)3Y(OH2) 9 and (MeC5H4)3Ho(OH2) 11. Die neuen Verbindungen wurden durch Elementaranalysen, sowie IR- und NMR-spektroskopisch charakterisiert. Die Röntgenstrukturanalyse ergibt für 2 eine monokline Elementarzelle, Raumgruppe P21/n mit den Gitterkonstanten a = 1146,0(3), b = 1046,6(3), c = 1514,9(3) pm, β = 94,83(2)°. Die Molekülstruktur zeigt verbrückende Hydroxylgruppen, der mittlere Y—O-Abstand beträgt 223,8(3) pm. 11 kristallisiert kubisch in der Raumgruppe I43d mit a = 1847,9(3) pm mit z = 16 Formeleinheiten in der Elementarzelle. Die Moleküle besitzen C3-3 Symmetrie, die Koordination ist trigonal-pyramidal mit einem Wassermolekül und drei Methylcyclopentadienylliganden. Der Abstand Ho—O beträgt 231 pm.
    Notes: The partial hydrolysis of [O(CH2CH2C5H4)2]Y(C5H4CH3) 1, [O(CH2CH2C5H4)2]Y(C5H5)3, and [O(CH2CH2C5H4)2]Ho(C5H4CH3) 5 results in the formation of [O(CH2CH2CH2C5H4)2Y(μ-OH)2]2 2, (C5H5)3Y(OH2) 9 and (MeC5H4)3Ho(OH2) 11. The new compounds have been characterized by elemental analyses, IR and NMR spectra. The X-ray structural analyses shows 2 to be monoclinic, space group P21/n with a = 1146.0(3), b= 1046.6(3), c = 1514.9(3) pm, β = 94.83(2)°. The molecular structure shows bridging hydroxyl groups with a mean distance Y—O = 223.8(3) pm. 11 crystallizes in the cubic space group 143d with a = 1847.9(3)pm with Z = 16 molecules per unit cell. The molecules posses symmetry C3-3, the coordination is trigonal pyramidal with three methylcyclopentadienyl anions and one water molecule as ligands. The distance Ho—O is 231 pm.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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