Synthesis and Structural Characterization of Adduct [La(NO3)3*4H2O]*2(BQEB)
来源期刊:JOURNAL OF RARE EARTHS2001年第1期
论文作者:陈学安 朱文祥 张永安 李言 苟宝迪
Abstract: New podand compound 1,2-bis (8′-quinolyloxy ethoxy) benzene (BQEB) was prepared. A lanthanum adduct with BQEB was synthesized and its structure was characterized by X-ray crystal analysis using Mo Kα radiation (λ=0.071073 nm). Crystal data: space group C2/c, Z=4, a=1.8636(3) nm, b=2.0036(3) nm, c=1.5186(3) nm, α=90.00°, β=91.452(14)°, γ=90.00°, Rf=0.0373 for 6520 observed data. In the crystal structure the La3+ is ten-coordinated by three NO-3 and four H2O. Two podand molecules link to the coordination core via O—H…N (average O…N=0.2766(3) nm) hydrogen bonds. The adduct has a one-dimensional chain sandwich structure consisting of every two podand molecules with a [La(NO3)3*4H2O] as a bridge. The whole crystal is packed in a manner of…LLMLLMLL….
陈学安1,朱文祥2,张永安2,李言1,苟宝迪2
(1.Institute of Chemistry, Chinese Academy of Sciences,;
2.Department of Chemistry, Beijing Normal University,)
Abstract:New podand compound 1,2-bis (8′-quinolyloxy ethoxy) benzene (BQEB) was prepared. A lanthanum adduct with BQEB was synthesized and its structure was characterized by X-ray crystal analysis using Mo Kα radiation (λ=0.071073 nm). Crystal data: space group C2/c, Z=4, a=1.8636(3) nm, b=2.0036(3) nm, c=1.5186(3) nm, α=90.00°, β=91.452(14)°, γ=90.00°, Rf=0.0373 for 6520 observed data. In the crystal structure the La3+ is ten-coordinated by three NO-3 and four H2O. Two podand molecules link to the coordination core via O—H…N (average O…N=0.2766(3) nm) hydrogen bonds. The adduct has a one-dimensional chain sandwich structure consisting of every two podand molecules with a [La(NO3)3*4H2O] as a bridge. The whole crystal is packed in a manner of…LLMLLMLL….
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