用拉曼光谱以及 X 射线和中子衍射对氢氧化物 α-Be(OH)2 和 α-Zn(OH)2 中的氢键进行低温研究
摘要:
通过拉曼光谱以及 X 射线和中子衍射对氢氧化物 β-Be(OH)2 和 e-Zn(OH)2 中氢桥键的低温研究 β-Be(OH) 2 的完全和部分氘化样品和 e-Zn(OH)2 通过拉曼光谱在 ~ 10 K 到 ~ 300 K 的温度范围内进行了研究。在 5 K 到 245 K 的温度范围内评估了 β-Be(OD) 2 的 X 射线和中子衍射数据。粉末样品。e-Zn(OD)2 的中子衍射在 5 K 和 298 K 之间进行。在这些温度范围内,这两种氢氧化物结晶同型,具有正交对称性,空间群 P212121,Z = 4。β-Be(OH )2 显示出意想不到的、直到现在还没有被理解的效果:随着从~ 40 K 开始的温度降低,由氢桥键连接的两个晶体不等价的氢氧根离子的拉伸模式转变为更高的波数。对于 e-Zn(OH)2,这种反转已经发生在 50 K 并且效果明显更强。
Synthesis and characterization of three new beryllium phosphate/phosphites with different structure-directing agents
作者:Jie Pan、Zhen-Zhen Xue、Jin-Hua Li、Li Wei、Guo-Ming Wang
DOI:10.1016/j.molstruc.2016.11.055
日期:2017.3
Abstract Three new organically templated beryllium phosphate and phosphites, [C2H8N][Be2(PO4) (HPO4) (H2O)]·(H2O)0.5 (1), [C3H12N2][Be3(HPO3)4] (2) and [C6H18N2][Be3(HPO3)4] (3), have been synthesized and structurally characterized by single-crystal X-ray diffraction analyses. The structure of 1 consists of BeO4 and PO4 tetrahedra, displaying a double-layered structure with [Be4(PO4)2(HPO4)2(H2O)2]
Alkaline Earth Metal Salts of 5,5′-Bistetrazole - from Academical Interest to Practical Application
作者:Niko Fischer、Thomas M. Klapötke、Kristina Peters、Magdalena Rusan、Jörg Stierstorfer
DOI:10.1002/zaac.201100263
日期:2011.10
The alkalineearthmetalsalts of 5,5′-BT, [Be(H2O)4](5,5′-BT)·H2O (1), [Mg(H2O)6(5,5′-BT)·3H2O (2), [Ca(H2O)4(5,5′-BT)]·H2O (3), [Sr(H2O)4(5,5′-BT)]·2DMF (4), and [Ba(H2O)4(5,5′-BT)] (5) were fully characterized by low temperature X-ray diffraction, vibrational (IR, Raman) and NMR spectroscopy, elemental analysis and differential scanning calorimetry (DSC). A detailed description of the crystal structures
Cationic, neutral and anionic metal(II) complexes derived from 4-oxo-4<i>H</i>-pyran-2,6-dicarboxylic acid (chelidonic acid)
作者:Vaduganathan Yasodha、Subbaiah Govindarajan、John N. Low、Christopher Glidewell
DOI:10.1107/s010827010701459x
日期:2007.5.15
tetrahydrate, [Mn2(C(7)H(2)O(6))2(H2O)(8)].4H2O, (III), the metal ions and the organic ligands form a cyclic centrosymmetric Mn2(C(7)H(2)O(6))2unit, and these units are linked into a complex three-dimensional framework structure containing 12 independent O-H...O hydrogen bonds. There are two independent Cu(II) ions in tetraaqua(4-oxo-4H-pyran-2,6-dicarboxylato)copper(II), [Cu(C(7)H(2)O(6))(H2O)4], (IV), and
Synthesis, structure, and spectral luminescent properties of novel 1,2,4-triazole derivatives containing benzthiazole group
作者:A. D. Beldovskaya、G. A. Dushenko、N. I. Vikrishchuk、L. D. Popov、Yu. V. Revinskii、I. E. Mikhailov
DOI:10.1134/s1070363213110200
日期:2013.11
Novelderivatives of 1,2,4-triazol with benzthiazole fragment have been prepared, including Cu(II) and Be complexes. Their structure and spectral luminescent properties have been investigated. With ohydroxyphenylbenzthiazolyl-1,2,4-triazole as an example, the density functional theory has been applied to find the stable conformers with different structures of coordination nodes, stabilized by intramolecular
作者:Raphael J. F. Berger、Michael Hartmann、Pekka Pyykkö、Dage Sundholm、Hubert Schmidbaur
DOI:10.1021/ic0007660
日期:2001.5.1
in the literature for the existence of any berylliumperoxide compound. All recent pertinent preparative attempts described in this work, using a range of beryllium salts with various peroxides as reagents under mild conditions, were equally unsuccessful. (1)H and (9)Be NMR investigations of aqueous solutions containing beryllium salts and hydrogen peroxide in a broad pH range also gave no definite