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Synthesis, Characterization and Crystal Structure of Quaternary Complex of Gadolinium (Ⅲ)
Author(s): ZHU Longguan, CAI Guoqiang, WANG Guoping, BEI Chuanjin, ZHENG Gangzhongxing
Pages: 9-
12
Year: 2003
Issue:
1
Journal: JOURNAL OF RARE EARTHS
Keyword: organic chemistry; gadolinium(Ⅲ); crystal structure; mixed ligands; ESR; quaternary complex; rare earths;
Abstract: A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH3CH2COO)2(NO3)(phen)]2, was synthesized and structurally characterized. The ESR spectrum of the complex with effective g values of 5.314, 2.473 and 1.880 in polycrystalline powder at room temperature is quite different from the U spectrum. The coordination number of Gd3+ is nine with a monocapped square antiprism geometry. And the stacking effect was observed in the complex. The crystal of the complex belongs to triclinic with space group P 1, a=0.9626(4) nm, b=0.9732(4) nm, c=1.1758(5) nm, α=102.45(1)°, β=108.16(1)°, γ=96.68(2)°, V=1.0018(7) nm3, Z=2, Dc=1.80 g*cm-3, μ(MoKα)=33.63 mm-1, F(000)=530, GOF=1.80, R=0.023 and Rw=0.027.
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