Barium-copper(II) oxocarbon compounds: synthesis, crystal structures and thermal behaviours of [Ba(H2O)5][Cu(C2O4)2(H2O)] and [Ba(C4O4)0.5(H2O)2]2[Cu(C4O4)2(H2O2]
1995; Elsevier BV; Volume: 230; Issue: 1-2 Linguagem: Inglês
10.1016/0020-1693(94)04187-z
ISSN1873-3255
AutoresAbdelouayed Bouayad, Jean‐Christian Trombe, Alain Gleizes,
Tópico(s)Crystal Structures and Properties
Resumo[Ba(H2O5][Cu(C2O4)2(H2O)] and [Ba(C4O4)0.5(H2O)2]2[Cu(C4O4)2(H2O)2] were obtained as single crystals in water. The structures were determined from X-ray diffraction data. [Ba(H2O)5][Cu(C2O4)2(H2O)]: triclinic, space group P1, a=9.209(2), b=10.938(1), c=6.547(1) Å, α=100.83(1), β=99.65(2), γ=85.45(2)°, Z=2; [Ba(C4O4)0.5(H2O)2]2[Cu(C4O4) 2(H2O)2]: triclinic, space group P1, a=7.752(1), b=10.445(2), c=7.420(1) Å, α=99.24(1), β=113.20(1), γ=109.87(1)°, Z=1. They are made of cationic layers separated by anions [Cu(C2O4)2(H2O)]2− and [Cu(C4O4)2(H2O)2]2−, respectively. Both compounds were submitted to thermal gravimetric and differential analyses in an oxygenated atmosphere, up to 950 °C. Final decomposition products were (i) BaCuO2 with small amounts of BaCO3 and CuO for [Ba(H2O)5][Cu(C2O4)2(H2O)], and (ii) an equimolecular mixture of BaCuO2 and BaCO3 for [Ba(C4O4)0.5(H2O)2]2[Cu(C4O4)2(H2O)2].
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