| 希土胺羧酸配合物的研究——Ⅲ.吡啶-2,6-二甲酸钕配合物{[Nd(HDPA)(DPA)(H2O)2]·4H2O}n合成及其晶体结构 |
| STUDIES ON RARE EARTH COMPLEXES OF AMINOPOLYCARBOXYLIC ACID Ⅲ. SYNTHESIS AND CRYSTAL STRUCTURE OF {[Nd(HDPA)(DPA)(H2O)]·4H2O}n COMPLEX |
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| 摘要: 关于吡啶-2,6-二甲酸希土配合物晶体结构有Na3[Ln(DPA)3]·yNaClO4·xH2O类型的报道[1]。本文合成了{[Nd(HDPA)(DPA)(H2O)2]·4H2O}n。配合物单晶并测定了其结构。 |
| 关键词: 希土 吡啶-2,6-二甲酸 晶体结构 |
| 基金项目: 国家自然科学基金 |
| Abstract: The complexes of {[Ln(HDPA)(DPA)(H2O)2]·4H2O}n have been synthesized (Ln = Nd, Gd; H2DPA = dipicolinic acid )and studied by thermoanalysis and infrared spectroscopy.The crystal structure of {[Nd(HDPA)(DPA)(H2O)2]·4H2O}n has been determined by single crystal diffraction. 3767 independent reflections vere collected, of which 1540 were used for structure refining. The final deviation factors of R and Rω equal to 0.059 and 0.067 respectively. Four formula units crystallize in a monoclinic cell with the dimensions a= 12.842Å, b= 11.170Å, c= 13.984Å, β= 102.11°. The space group is P2(1)/ a. The result turns out that the complex is a one dimensional polymer in which the Nd atoms are connected by the bridging carboxyl groups.In the complex, every neodymium ion is coordinated by five carboxylate oxygen ,four of which-are from the four carboxylate groups of the two dipicolinic acid molecules and the other is the bridging carboxylate oxygen of dipicolinic ion in the pyr neighboring formula unit; the two nitrogen from the pyridine rings and the two oxygen from two water molecules ,so that coordination number of the neodymium is 9. The hydrogen on the undissociated carboxylic acid in the HDPA forms a hydrogen bond with the water molecule. rare earth dipicolinic acid crystal structure |
| Keywords: rare earth dipicolioic acid crystal structure |
| 投稿时间：1989-12-26 |
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| 缪方明,王瑾玲,金天柱,刘军钪,张慧珍,黄春辉.希土胺羧酸配合物的研究——Ⅲ.吡啶-2,6-二甲酸钕配合物{[Nd(HDPA)(DPA)(H2O)2]·4H2O}n合成及其晶体结构[J].无机化学学报,1992,8(2):180-183. |
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