lanthanum(III) carbonate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 有机碳酸及其衍生物
• 英文名称: lanthanum(III) carbonate
• 英文别名: Lanthanum carbonate；anhydrous lanthanum carbonate；Lanthanum(3+);carbonate
• 化学式: 3CO₃*2La
• 分子量: 457.839
• InChiKey: QEVBQWCSPKCYSU-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  -2.45
• 重原子数：
  5
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  63.2
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  lanthanum(III) carbonate 在 氢氟酸 作用下， 以 氢氟酸 为溶剂， 以90%的产率得到氟化镧
  参考文献：
  名称：

  氟化物光纤用高纯镧化合物的制备

  摘要：

  摘要 介绍了共沉淀法制备超纯硝酸镧的方法。还描述了从纯硝酸盐制备高纯度碳酸镧。纯碳酸镧的氢氟化产生用于制备重金属氟化物玻璃的高纯度氟化镧。

  DOI：

  10.1016/0025-5408(89)90120-7
• 作为产物：
  描述：

  以 neat (no solvent) 为溶剂， 生成 lanthanum(III) carbonate
  参考文献：
  名称：

  Synthesis, Characterization, and Electrochemical Studies of Ternary Complexes of Lanthanum(III) and Cerium(III) with Some Naphthylideneamino Acids and Imidazoles

  摘要：

  A new series of ternary lanthanium(III) and cerium(III) complexes containing Schiff bases derived from some amino acids, viz: glycine; alanine; phenylalanine; valine and leucine with 2-hydroxy-1-naphthaldehyde as primary ligands, and 1-methylimidazole & 1,2-dimethylimidazole as secondary ligands were synthesized. The complexes were characterized on the bases of microanalyses, electrical conductance, IR & H-1 NMR spectra, thermal analysis and cyclic voltammetric data. All complexes were found to be non-electrolytes with the general formula of [ML(NO3 )Im center dot nH(2)O] (where M = La(III) or Ce(III), L = naphthylideneamino acids, Im = 1-methylimidazole or 1,2-dimethylimidazole and n = 1 or 2). The redox properties of some of the ternary complexes of La(III) and Ce(III) were examined using cyclic voltammetry in 0.1 mol dm(-3) TBAP/DMSO solutions. The reduction potentials of the investigated complexes showed a dependence upon the nature of the amino acid of the ligand. The stability of the complexes is discussed on the basis of the thermal and electrochemical data.

  DOI：

  10.1080/15533170500359711
• 作为试剂：
  描述：

  马来酸酐 、 二乙醇胺 、 顺丁烯二酸 在 lanthanum(III) carbonate 、 sodium hydroxide 作用下， 以 水 为溶剂， 生成 DL-天冬氨酸,N-(1,2-二羧基乙基)- 、 aspartic acid diethoxy succinate
  参考文献：
  名称：

  CATALYST RECOVERY PROCESS

  摘要：

  公开号：

  EP2576049B1

文献信息

• Supramolecular architectures of N,N,N′,N′-tetrakis-(2-hydroxyethyl)ethylenediamine and tris(2-hydroxyethyl)amine with La(<scp>iii</scp>) picrate
  作者：Rakesh Kumar、Sangeeta Obrai、Amanpreet Kaur Jassal、Maninder Singh Hundal

  DOI：10.1039/c4ra05835f

  日期：——

  The present work consists of synthesis, crystal structure and computational analyses of supramolecular architectures: complexes [La(THEEN)(PIC)(H2O)2](PIC)2·2H2O (1), [La(TEAH3)2(H2O)2](PIC)3 (2) and compounds [THEENH2+ (PIC−)2] (I) and [TEAH4+( PIC−)] (II) where THEEN is N,N,N′,N′-tetrakis-(2-hydroxyethyl)ethylenediamine (a tetrapodal ligand) and TEAH3 is triethanolamine (a tripodal ligand). Compounds

  目前的工作包括超分子结构的合成，晶体结构和计算分析：配合物[La（THEEN）（PIC）（H 2 O）2 ]（PIC）2 ·2H 2 O（1），[La（TEAH 3）2（H 2 O）2 ]（PIC）3（2）和化合物[THEENH 2 +（PIC - ）2 ]（我）和[TEAH 4 +（PIC -）]（II）其中THEEN是ñ，ñ，ñ'，N'-四-（2-羟乙基）乙二胺（四足配体）和TEAH 3是三乙醇胺（三脚架配体）。化合物I和II分别是由于质子从苦味酸转移到四脚体和三脚体上而形成的。四足配体（THEEN）的链通过其所有六个潜在的供体位点与La（III）离子配位。在化合物（I）中，NC -C-N部分的扭转角是反角，而在化合物1中，其扭转角是反角。三脚架配体（TEAH 3）的链与La（III）配位）通过其所有四个潜在的捐赠者网站。配合物（1）和（2）已获得了配位数为10的扭曲的二阶方形反棱角几
• Process for the preparation of aryl ketones generating reduced amounts of toxic byproducts
  申请人：College of the Holy Cross

  公开号：US06362375B1

  公开（公告）日：2002-03-26

  An efficient, cost-effective method useful for the production of aryl ketones that minimizes the generation of toxic byproducts is disclosed. The method utilizes a metal triflate salt to catalyze the reaction between the carboxylic acid substrate and the aromatic substrate. The water generated by the reaction is collected and removed during the process.

  揭示了一种高效、成本效益的方法，用于生产芳基酮，可以最大程度地减少有毒副产物的生成。该方法利用金属三氟甲烷酸盐催化羧酸底物与芳香族底物之间的反应。反应产生的水被收集并在过程中去除。
• High productivity alkoxylation processes
  申请人：McDaniel Kenneth G.

  公开号：US20080167501A1

  公开（公告）日：2008-07-10

  The present invention provides a continuous process for the preparation of a polyoxyalkylene polyether product of number average molecular weight N employing continuous addition of starter, involving a) establishing in a continuous reactor a first portion of a catalyst/initial starter mixture effective initiate polyoxyalkylation of the initial starter after introduction of alkylene oxide into the continuous reactor, b) continuously introducing into the continuous reactor one or more alkylene oxides, c) continuously introducing into the continuous reactor one or more continuously added starters which may be the same or different than said initial starter, d) continuously introducing into the reactor fresh catalyst and/or further catalyst/further starter mixture such that the catalytic activity is maintained, wherein the catalyst is selected from the group consisting of modified oxides and hydroxides of calcium, strontium and barium, lanthanum phosphates or lanthanide series (rare earth) phosphates and hydrotalcites and synthetic hydrotalcites, e) polyoxyalkylating combined starters by continuously practicing at least steps b) through d) herein until a polyoxyalkylene polyether product of number average molecular weight N is obtained and f) continuously removing the polyoxyalkylene polyether product from the continuous reactor. Modified-calcium hydroxide or modified calcium oxide and lanthanum phosphate catalysts exhibit catch-up kinetics and are thus useful for the production of polyalkylene oxides using the continuous and CAOS processes.

  本发明提供了一种连续的工艺，用于制备聚氧烷基聚醚产品，其平均分子量为N，采用连续添加起始剂，包括a)在连续反应器中建立催化剂/初始起始剂混合物的第一部分，有效地在将环氧烷氧化物引入连续反应器后启动初始起始剂的聚氧烷基化，b)连续将一种或多种环氧烷氧化物引入连续反应器，c)连续将一种或多种连续添加的起始剂引入连续反应器，这些起始剂可以与初始起始剂相同或不同，d)连续将新的催化剂和/或进一步的催化剂/进一步的起始剂混合物引入反应器，以维持催化活性，其中催化剂选自改性氧化钙、锶和钡、镧磷酸盐或镧系（稀土）磷酸盐、水滑石和合成水滑石等组成的群组，e)通过在至少执行步骤b)至d)直至获得平均分子量为N的聚氧烷基聚醚产品的连续实践，对组合起始剂进行聚氧烷基化，f)连续从连续反应器中移除聚氧烷基聚醚产品。改性氢氧化钙或改性氧化钙和镧磷酸盐催化剂表现出追赶动力学，因此适用于使用连续和CAOS工艺生产聚烷氧化物。
• Different hydrated forms of the ethylenediaminetetraacetato complexes of the light rare earths
  作者：J.Linn Mackey、David E. Goodney、James R. Cast

  DOI：10.1016/0022-1902(71)80276-2

  日期：1971.11

  The reaction between the carbonates of the light rare earths and ethylenediaminetetraacetic acid (EDTA) yields different forms of the protonated 1:1 rare earth-EDTA chelates depending on the temperature. Near room temperature, multihydrates are formed (H[Ln(EDTA)]·nH2O, where n = 7 or 5), while above 45°C H[Ln(EDTA)]·mH2O is formed where m = 1 or 0. These chelates have been characterized by i.r., TGA

  轻稀土的碳酸盐与乙二胺四乙酸（EDTA）之间的反应会根据温度产生不同形式的质子化1：1稀土-EDTA螯合物。在室温附近，会形成多水合物（H [Ln（EDTA）]· n H 2 O，其中n = 7或5），而在45°CH以上，会形成多水合物CH [Ln（EDTA）]· m H 2 O，其中m = 1或0。这些螯合物的特征在于ir，TGA和X射线粉末衍射。La，Ce，Pr和Nd的多水合物螯合物H [Ln（EDTA）]·7H 2 O是同构的，而H [Sm（EDTA）]·5H 2 O和H [Eu（EDTA）]·5H 2O形成不同的同构系列。红外光谱和溶解度表明这两个系列的结构不同。根据稀土的配位数，讨论了各种质子化1：1螯合物的稳定性和结构。
• Preparation, I.R. and thermogravimetric studies on triglycine rare earth chloride complexes
  作者：B.S. Mathur、T.S. Srivastava

  DOI：10.1016/0022-1902(70)80211-1

  日期：1970.10

  Several triglycine complexes of rare earth chlorides have been prepared which have composition RCl32H3N+CH2COO−. 3H2O, where R = Y, La, Ce. Pr, Nd, Sm and Dy. The i.r. spectra of these complexes have been interpreted in terms of zwitterion structure of glycine which is coordinated to rare earth cations through oxygens of carboxylic group. The i.r. data together with thermal behaviour of above complexes

  稀土氯化物的几个三甘氨酸配合物已经制备具有组成ř氯3 2H 3 Ñ + CH 2 COO - 。3H 2 O，其中R = Y，La，Ce。Pr，Nd，Sm和Dy。这些配合物的红外光谱已经根据甘氨酸的两性离子结构进行了解释，甘氨酸的两性离子结构通过羧基的氧与稀土阳离子配位。红外数据以及上述配合物的热行为表明，水分子也与稀土离子配位。