ChemInform Abstract: THE CRYSTAL STRUCTURE OF THE AMMONIUM BROMIDE COMPLEX OF 1,4,7,10,13,16-HEXAOXACYCLOOCTADECANE (18-CROWN-6), C12H24O6.NH4BR.2H2O

1978 ◽  
Vol 9 (24) ◽  
Author(s):  
O. NAGANO ◽  
A. KOBAYASHI ◽  
Y. SASAKI
Keyword(s):  
Crystal Structure ◽  
Ammonium Bromide ◽  
Bromide Complex

Poly[tetramethylammonium [μ4-bromido-di-μ2-bromido-dicuprate(I)]]

2007 ◽  
Vol 63 (11) ◽  
pp. m2651-m2651
Author(s):  
Xi Liu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Complex Anion ◽  
Mirror Plane ◽  
One Dimensional ◽  
Compound C ◽  
Polymeric Chains ◽  
Bromide Ions ◽  
Complex Anions ◽  
Bromide Complex

The title compound, {(C4H12N)[Cu2Br3]} n , consists of CuI-bromide complex anions and tetramethylammonium cations. The bromide ions bridge CuI ions to form one-dimensional polymeric chains. Both the cation and the anion have mirror symmetries; in the cation, the N atom and two C atoms are located on a mirror plane, while in the complex anion, the three bromide ions are located on two different mirror planes. No hydrogen bonding occurs in the crystal structure.

Crystal Structure of La3OBr[AsO3]2

2010 ◽  
Vol 65 (10) ◽  
pp. 1289-1292 ◽  
Author(s):  
Hamdi Ben Yahia ◽  
Rainer Pöttgen ◽  
Ute Ch. Rodewald
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lanthanum Oxide ◽  
Ammonium Bromide ◽  
Space Group ◽  
Type Space ◽  
Oxygen Atoms

Colorless needles of the arsenite bromide La3OBr[AsO3]2 were synthesized from ammonium dihydrogen arsenate, ammonium bromide and lanthanum oxide in an NaBr/KBr flux at 900 °C. La3OBr[AsO3]2 crystallizes with the centrosymmetric tetragonal La3OCl[AsO3]2 type, space group P42/mnm. The structure was refined from single-crystal diffractometer data: a = 13.0431(15), c = 5.6127(7) Å , wR2 = 0.0454, 945 F2 values, and 39 variables. It consists of chains of trans-edge-sharing OLa4/2 tetrahedra which are coordinated by [AsO3]3− units via the oxygen atoms

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