Details

Autor(en) / Beteiligte

• Pechenyuk, S.I.
• Zolotarev, А.А.
• Gosteva, A.N.
• Domonov, D.P.
• Shimkin, А.А.

Titel

Crystal structures and thermal behaviour of double complex compounds incorporating the [Cr{CO(NH2)2}6]3+ cation

Ist Teil von

• Journal of molecular structure, 2017-11, Vol.1147, p.388-396

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Double complex compounds (DCC) of the [Cr(ur)6][Fe(CN)6]·4H2O (I), [Cr(ur)6][Co(CN)6]·4H2O (II), [Cr(ur)6][Fe(Ox)3]·2H2O (III), and [Cr(ur)6][Co(Ox)3].3.5H2O (IV) composition, where ur is CO(NH2)2, Ох – С2О42− have been synthesized and their crystal structures have been studied. The DCC I, II and IV are triclinic (Р-1); III is orthorhombic (С2221). The DCC thermal behavior in air and argon atmospheres was analyzed by the following parameters: the temperature interval of total decomposition and the nature of gaseous and solid products. The end solid products in air were FeO and FeCr2O4 for I, a mixture of СоCr2O4 + Со2CrO4 for II and IV and an X-ray amorphous phase with composition CrFeO2.5 for III. The gaseous products were HCN, NH3, HNCO, N2O, СО, СО2, N2, and urea. The temperatures of total decomposition in air were: I, II 400°С, III – 350°С, IV – 460°С. In argon, the solid residue contained, besides the oxides, 7–30% of carbon up to 1000°С. [Display omitted] •The compounds [Cr(CO(NH2)2)6][ML6] (M = Fe(I, III), Co(II, IV); L = CN−(I,II), 1/2C2O42−(III, IV) have been synthesized.•Their structures and thermal behavior have been studied. I, II, IV are triclinic, III is orthorhombic one.•The end solid products are spinels of type MCr2O4, gaseous products are HCN, NH3, HNCO, N2O, CO, CO2, CO(NH2)2.