高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (2): 118.

• 研究论文 • 上一篇    下一篇

稀土氨基酸络合物的研究(Ⅰ)--一氯化三甘氨酸二水合谱的晶体结构

金天柱, 杨常青, 杨清传, 吴瑾光, 徐光宪   

  1. 北京大学化学系
  • 收稿日期:1987-07-03 出版日期:1989-02-24 发布日期:1989-02-24
  • 通讯作者: 金天柱
  • 基金资助:

    国家自然科学基金

Studies on Rare Earth Complexes of Aminoacids(Ⅰ) --Synthesis and Crystal Structure of TrigJycinato-Diaquo- Praseodymium Chlorides

Jin Tianzhu, Yang Changqing, Yang Qingchuan, Wu lingnang, Xu Guangxian   

  1. Department of Chemistry, Peking University, Beijng
  • Received:1987-07-03 Online:1989-02-24 Published:1989-02-24

PDF (PC)

被引次数

34

摘要： 在水溶液中培养了甘氨酸镨、钕的针状晶体,元素分析结果表明可用Ln(Gly)3Cl3·3H2O表示(Ln为Pr,Nd;Gly为甘氨酸)。用X射线衍射方法测定了Pr(Gly)3Cl3·3H2O的单晶结构,其结构式为{[Pr(Gly)3·(H2O)2]·Cl3·H2O}n,属正交晶系,空间群P212121,每一晶胞中有4个络合单元,形成一维链式聚合物·晶胞参数如下:α=4.779(1)Å,b=12.052(3)Å,c=30.953(11)Å。络合单元中镨为九配位,其配位多面体为畸变的三冠三角棱柱体。

关键词: 稀土, 氨基酸, 晶体结构

Abstract: The triglycinato-diaquo-lanthanide chlorides [Ln(Gly)3(H2O)2]·Cl3·H2O have been synthesized in the aqueous solution (Ln=Pr, Nd),The crystal structure of this complex compound has been determined by X-ray analysis as follws:Space group P212121; a=4.779(1), b=12.052(3), c=30.953(11)Å; Z=4. The crystal is a one-dimentional chain complex of infinite length with three glycinic acid, NH3+CH2COO-, serving as bridging groups connecting neighboring Pr atoms (See Fig. 2).In addrtion, there are two H2O molecules coordinated to each Pr atom, so that the coordination number of Pr is nine, forming a distorted tricapped trigon-alprism. There is another H3O molecule not coordinated to Pr. The three Cl-anions are in the neighbourhood of -NH3+ cations. There is no direct metal-metal bond between Pr atoms.

Key words: Rare earth, Aminoacids, Crystal structure

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