Binary complexes [Co(A)6][M(C2O4)3] (A = NH3, 1/2C2H8N2, M = Fe, Cr) are synthesized, and their physicochemical properties and thermal decomposition in air, argon, and hydrogen are studied. The qualitative and quantitative analyses are carried out for the solid and gaseous thermolysis products. Similar regularities are revealed in the behavior of complexes [Co(NH3)6][Fe(C2O4)3] (I), [Co(En)3][Fe(C2O4)3] (II), [Co(NH3)6][Cr(C2O4)3] (III), and [Co(En)3][Cr(C2O4)3(IV). The solid thermolysis product for complexes I and III in argon at 225 and 300°C is Co(NH2)2M(C2O4)2, respectively; and that for complexes II and IV at 280 and 380°C is Co(En)2M(C2O4)2. The gaseous thermolysis products are CO and CO2, NH3, En partially isolated upon thermal destruction, other products of En destruction, and En itself. Complex III forms the most highly dispersed solid products in a range of 300–400°C.
Russian Journal of Coordination Chemistry – Springer Journals
Published: Mar 5, 2015
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