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  • 1
    ISSN: 0044-2313
    Keywords: GdIII and SmIII octahedra complexes ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Complexes of the Lanthanoides with Bidentate Ligands. The Crystal Structures of [(C17H17N2)GdBr2(thf)2] and [(C17H17N2)3Ln] (L = Sm, Gd)Reaction of [(AIP)Li] with GdBr3 leads to a new mononuclear complex [(AIP)GdBr2(thf)2] 1. In contrast to this with SmI2 the compound [(AIP)3Sm] 2 is build up. Such complexes are also formed with Gd(OR*)3 (R* = OtBu2C6H3) and [(AIP)Li] in a 1:3 ratio, [(AIP)3Gd] 3. The structures of 1-3 were characterized by X-ray single crystal structure analysis (1: space group Pna21 (No. 33), Z = 4, a = 1 972.7(9) pm, b = 984.7(5) pm, c = 1 425.0(8) pm, α = β = γ = 90°; 2 · 2 THF: space group C2/c (No. 15), Z = 8, a = 3 644.4(9) pm, b = 1 437.5(5) pm, c = 2 334.4(7) pm, β = 1 21.07(6)°; 3: space group P2(1)/c (No. 14), Z = 4, a = 1 872.9(1) pm, b = 1 064.6(1) pm, c = 2 282.4(2) pm, β = 103.75(8)°).
    Notes: GdBr3 reagiert mit [(AIP)Li] zu dem einkernigen Komplex [(AIP)GdBr2(thf)2] 1. Mit SmI2 bildet sich dagegen überraschenderweise die Komplexverbindung [(AIP)3Sm] 2. Komplexe dieser Art bilden sich auch bei der Umsetzung von Gd(OR*)3 (R* = OtBu2C6H3) mit [(AIP)Li] im Verhältnis 1:3, [(AIP)3Gd] 3. Der Aufbau von 1-3 konnte durch Kristallstrukturanalyse geklärt werden (1: Raumgruppe Pna21 (Nr. 33), Z = 4, a = 1 972,7(9) pm, b = 984,7(5) pm, c = 1 425,0(8) pm, α = β = γ = 90°; 2 · 2 THF: Raumgruppe C2/c (Nr. 15), Z = 8, a = 3 644,4(9) pm, b = 1 437,5(5) pm, c = 2 334,4(7) pm, β = 1 21,07(6)°; 3: Raumgruppe P2(1)/c (Nr. 14), Z = 4, a = 1 872,9(1) pm, b = 1 064,6(1) pm, c = 2 282,4(2) pm, β = 103,75(8)°).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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