[Ba2(C2H6O2)4][Ge2(C2H4O2)6] · 2.5 C2H6O2 – an ethanediolato complex of germanium. Synthesis, thermal decomposition and crystal structure

Abstract

Abstract [Ba2(C2H6O2)4][Ge2(C2H4O2)6] · 2.5 C2H6O2 (3a) is isolated from the reaction of GeO2 · aq with Ba(OH)2 · 8 H2O in glycol (1,2-ethanediol). 3a crystallizes in the space group P-1 with a = 10.324(2) Å, b = 13.932(3) Å, c = 15.800(3) Å, α = 102.86(2)°, β = 91.33°, γ = 109,47° and V = 2077.2(7) Å3. With increasing temperature 3a looses glycol and forms step by step [Ba(C2H6O2)2][Ge(C2H4O2)3] (3b), Ba[Ge(C2H4O2)3] (3c) and finally hexagonal BaGeO3 (4).