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- W2071798387 abstract "Abstract Four complexes with the formulae Gd 2 (ClF 2 CCOO) 6 (hypy) 2 ( 1 ), Gd 2 (F 3 CCOO) 6 (hypy) 2 ( 2 ), Gd 2 (F 2 HCCOO) 6 (hypy) 2 ( 3 ) and Gd 2 (Cl 2 HCCOO) 6 (H 2 O) 2 (hypy) 2 ( 4 ) have been synthesised and characterised by single‐crystal X‐ray diffraction methods at room temperature. The title compounds have been obtained by reaction of the corresponding gadolinium carboxylates with 4‐hydroxypyridine in a solution of ethanol and water. They crystallise in the triclinic space group P $bar {1}$ ( Z = 2) [ 1 : a = 999.8(4) pm, b = 1061.8(5) pm, c = 1283.6(6) pm, α = 91.23(5)°, β = 111.29(5)° and γ = 105.27(5)°; 2 : a = 972.4(4) pm, b = 1053.5(5) pm, c = 1252.4(6) pm, α = 94.23(5)°, β = 110.21(5)° and γ = 104.84(5)°; 3 : a = 883.3(4) pm, b = 1051.3(4) pm, c = 1284.9(6) pm, α = 100.46(5)°, β = 109.87(5)° and γ = 97.43(5)°; 4 : a = 913.7(4) pm, b = 1079.0(5) pm, c = 1137.5(5) pm, α = 93.41(5)°, β = 109.36(5)° and γ = 99.53(5)°]. The crystal structures consist of dinuclear Gd 3+ –Gd 3+ units. The corresponding residuals (all data) for the refined structures are 4.82 % ( 1 ), 5.93 % ( 2 ), 5.68 % ( 3 ) and 4.04 % ( 4 ). The magnetic behaviour of the compounds was investigated over the temperature range 1.76–300 K. The magnetic data were interpreted by considering exchange interactions within the dimeric units [ J ex = –0.019 cm –1 ( 1 ), J ex = –0.034 cm –1 ( 2 ), J ex = –0.064 cm –1 ( 3 ), J ex = –0.011 cm –1 ( 4 )].(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)" @default.
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- W2071798387 date "2006-08-22" @default.
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- W2071798387 title "Crystal Structure and Magnetic Behaviour of the New Gadolinium Carboxylates Gd <sub>2</sub> (ClF <sub>2</sub> CCOO) <sub>6</sub> (hypy) <sub>2</sub> , Gd <sub>2</sub> (F <sub>3</sub> CCOO) <sub>6</sub> (hypy) <sub>2</sub> , Gd <sub>2</sub> (F <sub>2</sub> HCCOO) <sub>6</sub> (hypy) <sub>2</sub> and Gd <sub>2</sub> (Cl <sub>2</sub> HCCOO) <sub>6</sub> (H <sub>2</sub> O) <sub>2</sub> (hypy) <sub>2</sub>" @default.
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- W2071798387 doi "https://doi.org/10.1002/ejic.200600353" @default.
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