【摘 要】
：
Synthesis and structure of the complex NH4[Yb(Cydta) (H2O)2]*5H2O(Cydta=trans-1,2-cyclohexanediaminetetraacetic acid) were reported. The crystal and molecular s
【机 构】
：
Department of Chemistry
论文部分内容阅读
Synthesis and structure of the complex NH4[Yb(Cydta) (H2O)2]*5H2O(Cydta=trans-1,2-cyclohexanediaminetetraacetic acid) were reported. The crystal and molecular structures of the title complex were determined by single-crystal X-ray structure analysis. The crystal of the complex NH4[YbⅢ(Cydta)(H2O)2]*5H2O belongs to triclinic crystal system and P(1) space group. The crystal data are as follows: a=0.8584(4) nm, b=1.0040(4) nm, c=1.4418(6) nm, V=1.2025(9) nm3, Z=2, M=659.49, Dc=1.821 g*cm-3, μ=3.963 mm-1 and F(000)=662. The final R and Rw values for 4093 (I>2θ(I)) unique reflections are 0.0454 and 0.0927, and the R and Rw values for 4877 (all data) are 0.0624 and 0.0985, respectively. The complex anion [Yb(Cydta)(H2O)2]- has a pseudo square antiprismatic eight-coordinate structure in which the six coordinate atoms, two N and four O, are from a Cydta ligand and two water molecules coordinate to Yb(Ⅲ) ion directly as the another two ligands.
其他文献
Two one-dimensional heterometallic coordination polymers {[CuEr(Gly)5(H2O)2](ClO4)5*H2O}n (1) and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10*4H2O}n (2) (Gly = glycine) were
Six new rare earth complexes with Schiff base from 2,6-diformylpyridine N-oxide and 4-amino-antipyrine were synthesized. These complexes with general formula RE
Based on the treatment that a rectangular function can be expanded into an approximate sum of complex Gaussian functions with finite numbers, the analytical exp
The rare earth nitrate complexes with 2,2′:4′,4″:2″,2-quaterpyridine (L) were prepared in ethylacetate. These new complexes with the general formula [RE(N
The interaction of MP 11 as a model of antioxidatase enzymes with La 3+ was investigated. It was found that La 3+ can increase in the non planarity of heme and the content of α helix and β
Using only one diffractive element, the Talbot interferometer provides a robust and inherently stable method for reproducing fiber Bragg gratings with variable
A novel type of thermal stabilizers-antimony tris(mercaptoethyl carboxylates) (Sb(SCH2CH2OOCR) 3), was synthesized from carboxylic acid, antimony trioxide and 2
The compositions of the extracted complexes of La, Gd, Er and Y with sec-octyl-phenoxy acetic acid in heptane and the related apparent extraction equilibrium co
Using compound energy model (CEM), the thermodynamic properties of and were evaluated.The evaluation was based on the optimization of ZrO2-CeO2 and ZrO2-CeO1.
The vertical excitation axial-flux kilowatt CO2 laser is an equipment widely used in the high-power laser heat treatment industrial applications. The experiment