Addition reactions of the unsaturated rhenium cluster anion [Re4(.mu.-H)3(.mu.3-H)2(CO)12]- with carbon monoxide, triphenylphosphine and acetonitrile and characterization of an unstable adduct with water. X-ray crystal structure of the tetraethylammonium salt of the derivative [Re4(.mu.-H)4(.mu.3-H)(CO)12(PPh3)]-

1993 ◽  
Vol 32 (6) ◽  
pp. 803-810 ◽  
Author(s):  
T. Beringhelli ◽  
G. D'Alfonso ◽  
A. Minoja ◽  
G. Ciani ◽  
D. M. Proserpio
Keyword(s):  
Crystal Structure ◽  
Carbon Monoxide ◽  
Cluster Anion ◽  
Addition Reactions ◽  
X Ray ◽  
Rhenium Cluster

The preparation and characterization of Pt(Se3PPh)(PR3)2; the X-ray crystal structure of Pt(Se3PPh)(dppe)·CH2Cl2

Polyhedron ◽  
1990 ◽  
Vol 9 (7) ◽  
pp. 987-990 ◽  
Author(s):  
Ivan P. Parkin ◽  
Mark J. Pilkington ◽  
Alexandra M.Z. Slawin ◽  
David J. Williams ◽  
J.Derek Woollins
Keyword(s):  
Crystal Structure ◽  
X Ray

Structural Systematics of Rare Earth Complexes. VII. Crystal Structure of Bis(2,2'/6',2␛-Terpyridinium) Octaaquaterbium(III) Heptachloride Hydrate

1994 ◽  
Vol 47 (2) ◽  
pp. 391 ◽  
Author(s):  
CJ Kepert ◽  
BW Skeleton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Single Crystal ◽  
Structural Characterization ◽  
Title Compound ◽  
Room Temperature ◽  
Chloride Ions ◽  
Full Matrix ◽  
X Ray

The room-temperature single-crystal X-ray structural characterization of the title compound (tpyH2)2[Tb(OH2)8]Cl7.~2⅓H2O is recorded. Crystals are triclinic, Pī , a 17.063(5), b 16.243(3), c 7.878(3) Ǻ, α 84.78(2), β 84.39(3), γ 87.81(2)°, Z = 2 formula units; 3167 'observed' diffractometer reflections were refined by full-matrix least-squares procedures to a residual of 0.057. Notable features of interest of the compound are the 'chelation' of chloride ions by the terpyridinium cations , and the existence of a free [Tb(OH2)8]2+ cation in the presence of an abundance of chloride ions.

scholarly journals STRUCTURAL CHARACTERIZATION OF THE NEW DIAMOND-LIKE SEMICONDUCTOR CuNbGaSe3

2018 ◽  
Vol 15 (29) ◽  
pp. 228-233
Author(s):  
J. A. FLORES-CRUZ ◽  
G. E. DELGADO ◽  
J. E. CONTRERAS ◽  
M. QUINTERO ◽  
L. NIEVES ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Behavior ◽  
Secondary Phase ◽  
Chalcopyrite Structure ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Chalcogenide Compound ◽  
Semiconductor Type

The chalcogenide compound CuNbGaSe3, belonging to the system I-II-III-VI3, has been investigated by means of X-ray powder diffraction and its crystal structure has been refined by the Rietveld method.This is a material of the semiconductor type, which improves the properties of a simple semiconductor like CuGaSe2 because it ads spintronic applications due to its magnetic behavior. The powder pattern was composed by 94.2% of the principal phase CuNbGaSe3 and 5.8% of the secondary phase Cu0.667NbSe2. This material crystallizes with a CuFeInSe3-type structure in the tetragonal space group P4 2c (Nº 112), unit cell parameters a = 5.6199(4) Å, c = 11.0275(2) Å, V = 348.28(4) Å3, with a normal adamantane-structure where occurs a degradation of symmetry from the chalcopyrite structure I4 2d to a related structure P4 2c.

Darstellung und Charakterisierung von Rubidiumhydrogencyanamid/Synthesis and Characterization of Rubidium Hydrogen Cyanamide

1999 ◽  
Vol 54 (11) ◽  
pp. 1375-1378 ◽  
Author(s):  
Michael Becker ◽  
Martin Jansen
Keyword(s):  
Crystal Structure ◽  
Liquid Ammonia ◽  
Synthesis And Characterization ◽  
Hydrogen Cyanamide ◽  
X Ray ◽  
Bond Lengths

The synthesis of RbHCN2 was carried out by reaction of cyanamide with rubidium amide in liquid ammonia. The crystal structure has been determinedo by x-ray powder methods (orthorhombic, P21,21,21, a = 7.299(1), b = 9.435(1), c = 9.420(1) Å; Z = 8). The anion is slightly bent (174°) and exhibits two different bond lengths (C-N: 1.17, HN-C: 1.31 Å).

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