ISSN:
0044-2313
Keywords:
GdIII
;
SmIII
;
binuclear complex
;
thioureato-ligand
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Thioureato Brigded Binuclear Complexes of the Lanthanides Synthesis and Crystal Structure of [{PhC(NPh)NC(S)NEt2}{Et2NC(S)NH}LnBr(thf)]2 (Ln = Gd, Sm)The reaction of potassium-N-(diethylaminothiocarbonyl)-N′-phenyl-benzamidinat with LnBr3 (Ln = Gd, Sm) leads to the formation of the binuclear complexes [{PhC(NPh)NC(S)NEt2}{Et2NC(S)N}LnBr(thf)]2} (Ln = Gd 1, Sm 2). The two bridging thiureatoligands are probably built during the reaction of potassium with the starting ligand. Coordination by one N-(diethylaminothiocarbonyl)-N′-phenylbenzamidinato-ligand, one Br-ion and one THF-ligand leads to square antiprismatic coordination of the lanthanoids. The structures of both compounds were characterized by X-ray analysis (1: P1 (Nr.2), Z = 1, a = 12,006(4) Å, b = 12,245(4) Å, c = 13,612(3) Å, α = 70,55(3)°, β = 68,21(3)°, γ = 81,31(3)° 2: P1 (Nr.2), Z = 1, a = 11,803(3) Å, b = 12,344(5) Å, c = 12,797(8) Å, α = 103,07(5)°, β = 101,76(3)°, γ = 114,13(3)°)
Notes:
Bei der Reaktion von Kalium-N-(diethylaminothiocarbonyl)-N′-phenyl-benzamidinat mit LnBr3 (Ln = Gd, Sm) bilden sich die zweikernigen Komplexe [{PhC(NPh)NC(S)NEt2}{Et2NC(S)N}LnBr(thf)]2} (Ln = Gd 1, Sm 2). Die Lanthanoidionen werden durch zwei Thioureatoeinheiten verbrückt, die sich vermutlich schon bei der Metallierung des Liganden bilden. Durch zusätzliche Koordination eines N-(Diethylaminothiocarbonyl)-N′-phenyl-benzamidinato-Liganden sowie eines THF-Moleküls und eines Brom-Atoms erhält jedes Lanthanoidion eine quadratisch antiprismatische Koordination.Der Aufbau dieser Verbindungen konnte durch Kristallstrukturuntersuchungen geklärt werden (1: P1 (Nr.2), Z = 1, a = 12,006(4) Å, b = 12,245(4) Å, c = 13,612(3) Å, α = 70,55(3)°, β = 68,21(3)°, γ = 81,31(3)° 2: P1 (Nr.2), Z = 1, a = 11,803(3) Å, b = 12,344(5) Å, c = 12,797(8) Å, α = 103,07(5)°, β = 101,76(3)°, γ = 114,13(3)°)
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966220429
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