Synthesis, crystal structure and magnetic properties of a manganese(III) complex with bound water and double hydrogen-bonding bridges

Polyhedron ◽  
1997 ◽  
Vol 16 (8) ◽  
pp. 1273-1277 ◽  
Author(s):  
Xiang Shi Tan ◽  
Dao Feng Xiang ◽  
Wen Xia Tang ◽  
Min Qin Chen
1990 ◽  
Vol 45 (11) ◽  
pp. 1499-1502 ◽  
Author(s):  
Christian Robl ◽  
Stephanie Hentschel

Colorless orthorhombic single crystals of Be[C2(COO)2] · 4 H2O were grown in aqueous silica gel. Space group Cmcm, α = 1004.7(1), b = 675.0(1), c = 1262.4(2) pm, Rg = 0.0264. The crystal structure consists of Be(H2O)42+ tetrahedra and planar [C2(COO)2]2- anions linked together by strong asymmetric hydrogen bonds. A layer-like arrangement extending parallel (010) made up by [C2(COO)2]2- anions and hydrogen bound water molecules of the Be(H2O)42+ tetrahedra is the primary structural feature of Be[C2(COO)2] · 4H2O. These layers are stacked and interlinked by coordinative bonds between Be2+ and H2O to yield a rigid three-dimensional framework. Thermal decomposition commences with endothermic loss of water of crystallisation at 160 °C followed by several steps of exothermic degradation yielding finally a soot-like amorphous residue.


Author(s):  
Z. Cheng ◽  
Y. Cheng ◽  
L. Guo ◽  
D. Xu

AbstractThe crystal structure of the title compound D(H)LAP with chemical formula (D


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