Hexaaquacobalt(II) and hexaaquacadmium(II) 4-nitro-2,3,5,6- tetraoxopyridinates [M(H2O)6](C5HN 2O6)2 · 2H2O (M = Co and Cd): Synthesis, structures, and properties

The complexes [Cd(H2O)6](C5HN 2O6)2 · 2H2O (I) and [Co(H2O)6](C5HN2O6) 2 · 2H2O (II) were obtained in the crystalline state by reactions of cobalt chloride and cadmium chloride with ammonium 4-nitro-2,3,5,6-tetraoxopyridinate, (NH4)2 · (C5HO6N2)2. Their cocrystallization gave the heterometallic complex [Cd0.32Co0.68(H 2O)6](C5HN2O6) 2 · 2H2O (III). The crystal and molecular structures of complexes I-III were determined by X-ray diffraction. It was demonstrated that the complexation reactions occur by replacement of two ammonium cations 4-nitro-2,3,5,6-tetraoxopyridinate by the complex cations [M(H2O)6]2+. The tetraoxopyridinate anions and the complex cations are hydrogen-bonded through the coordinated and crystallization water molecules as well as through the O atoms of the organic anion. The thermolysis of complexes I and II was examined by TGA. © 2013 Pleiades Publishing, Ltd.

Authors
Editors
-
Publisher
-
Number of issue
3
Language
English
Pages
234-238
Status
Published
Department
-
Number
-
Volume
39
Year
2013
Organizations
  • 1 Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, Russian Federation
  • 2 Karpov Research Institute of Physical Chemistry, ul. Vorontsovo pole 10, Moscow, Russian Federation
Keywords
Ammonium cations; Cobalt chlorides; Cocrystallization; Complexation reaction; Crystal and molecular structure; Crystalline state; Heterometallic complexes; Organic anions; Chlorine compounds; Cobalt compounds; Complexation; Crystalline materials; Hydrogen bonds; Negative ions; Positive ions; X ray diffraction; Coordination reactions
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2114/