Syntheses, X-ray crystal structures and properties of di- and tetra-ferrocenyl nickel-bis(1,4-dithiin-5,6-dithiolate) complexes

2000 ◽  
Vol 10 (9) ◽  
pp. 2167-2172 ◽  
Author(s):  
Ha-Jin Lee ◽  
Dong-Youn Noh
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Structures And Properties ◽  
Dithiolate Complexes

Pd(II) and Pt(II) Complexes of 1,2-Bis(pyridin-2-yl)ethane-N,N'

1994 ◽  
Vol 49 (6) ◽  
pp. 844-848 ◽  
Author(s):  
A. McFarlane ◽  
J. R. Lusty ◽  
J. J. Fiol ◽  
A. Terrón ◽  
E. Molins ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Spectroscopic Data ◽  
Low Energy ◽  
X Ray ◽  
H Nmr ◽  
Direct Bond ◽  
Structures And Properties ◽  
C Nmr

X-ray crystal structures and properties of the two Pd(II) and Pt(II) complexes [bpeH2][PdCl4] and [Pt(bpe)Cl2], [bpe = 1,2-bis(pyridin-2-yl)ethane] are described and correlated with the IR and 1H NMR/13C NMR spectroscopic data. In the case of the Pt(II) complex, the 1,2-bis(pyridin-2-yl)ethane is bound to the metal by the heterocycle nitrogen atoms but no direct bond is found in the case of the Pd(II) complex. The ligand exhibits low energy geometries in both compounds: the cis-conformation in the Pt(II) complex, and the transconformation in the Pd(II) complex

Synthesen, Kristallstrukturen und Eigenschaften von Trisilber-und Trikalium-tri-μ-imido-cyclotriphosphat, Ag3(PO2NH)3 und K3(PO2NH)3 / Syntheses, Crystal Structures, and Properties of Trisilver and Tripotassium Tri-μ-im ido Cyclotriphosphate, Ag3(PO2NH)3 and K3(PO2NH)3

1997 ◽  
Vol 52 (2) ◽  
pp. 251-255 ◽  
Author(s):  
N. Stock ◽  
W. Schnick
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Nitrogen Atom ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Chair Conformation ◽  
X Ray ◽  
Diffusion Controlled ◽  
Structures And Properties ◽  
Ray Methods

Abstract Coarse crystalline Ag3(PO2NH)3 (1) and K3(PO2NH)3 (2) are obtained by addition of an aqueous solution of AgNO3 to an acidified solution of Na3(PO2NH)3 · 4H2O and by diffusion controlled addition of ethanol to a solution of K3(PO2NH)3 in water, respectively. The crystal structures of 1 and 2 have been determined by single crystal X-ray methods (Ag3(PO2NH)3: P21/c; a = 1166.6(1), b = 786.4(1), c = 997.8(1) pm, β = 106.91(1)°; Z = 4. K3(PO2NH)3: R3̄; a = 1271.4(2), c = 1017.9(2) pm, Z = 6). In Ag3(PO2NH)3 the cyclic anion is markedly distorted because of interactions between Ag+ and one nitrogen atom of the anion. In K3(PO2NH)3 the trimetaphosphimate ring shows a chair conformation and two cyclic anions are connected to each other by hydrogen bonds. DTA/TG investigations show thermal decomposition above 275 and 250 °C for 1 and 2, respectively.

Synthesis, Crystal Structures and Properties of the Polychalcogenides Manganese-tris(1,2-ethanediamine)-triselenide [Mn(en)3]Se3 and Manganese-tris(1,2-ethanediamine)-monotellurodiselenide [Mn(en)3 ]TeSe2

2000 ◽  
Vol 55 (9) ◽  
pp. 871-876 ◽  
Author(s):  
Frank Wendland ◽  
Christian Näther ◽  
Wolfgang Bensch
Keyword(s):  
Thermal Analysis ◽  
Weight Loss ◽  
Differential Thermal Analysis ◽  
Crystal Structures ◽  
Elemental Selenium ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Structures And Properties ◽  
Two Samples ◽  
Solvothermal Conditions

The reaction of manganese(II)-chloride-tetrahydrate, caesium triselenide and elemental selenium or tellurium in 1,2-ethanediamine (en) under solvothermal conditions leads to the formation of two new isostructural compounds [Mn(en)3]Se3 (1) and [Mn(en)3]TeSe2 (2). The compounds crystallize in the orthorhombic space group Pbcn with the lattice parameters a = 1149.39(9), b = 1506.83(11), c = 935.96(6) pm for 1 and a = 1184.1(2), b = 1495.3(2), c = 949.8(1) pm for 2. Their crystal structures are built up of [Mn(en)3]2+ cations and Se32- or TeSe22- anions, respectively. Each cation is surrounded by six next neighbouring anions, and vice versa. Between the cations and the anions hydrogen bonding is observed. The thermal behaviour was investigated using differential thermal analysis, thermogravimetry as well as X-ray powder diffraction. Completely different properties were found. Compound 1 decomposes in two distinct endothermic steps, while compound 2 shows only one endothermic peak. The weight loss for 1 corresponds roughly to the emission of all en molecules, whereas the weight loss for 2 is significantly lower. The final products are composed of MnSe2 and elemental Se or Te, respectively, and an unknown crystalline phase which is different for the two samples

scholarly journals Crystal structures of perovskite halide compounds used for solar cells

2020 ◽  
Vol 59 (1) ◽  
pp. 264-305 ◽  
Author(s):  
Takeo Oku
Keyword(s):  
Crystal Structures ◽  
Double Perovskite ◽  
Rietveld Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
3 Dimensional ◽  
Transmission Electron ◽  
Structures And Properties ◽  
Low Dimensional ◽  
Atomic Coordinates

AbstractThe crystal structures of various types of perovskite halide compounds were summarized and described. Atomic arrangements of these perovskite compounds can be investigated by X-ray diffraction and transmission electron microscopy. Based on the structural models of basic perovskite halides, X-ray and electron diffractions were calculated and discussed to compare with the experimental data. Other halides such as elemental substituted or cation ordered double perovskite compounds were also described. In addition to the ordinary 3-dimensional perovskites, low dimensional perovskites with 2-, 1-, or 0-dimensionalities were summarized. The structural stabilities of the perovskite halides could be investigated computing the tolerance and octahedral factors, which can be useful for the guideline of elemental substitution to improve the structures and properties, and several low toxic halides were proposed. For the device conformation, highly crystalline-orientated grains and dendritic structures can be formed and affected the photo-voltaic properties. The actual crystal structures of perovskite halides in the thin film configuration were studied by Rietveld analysis optimizing the atomic coordinates and occupancies with low residual factors. These results are useful for structure analysis of perovskite halide crystals, which are expected to be next-generation solar cell materials.

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