Synthesis, X-ray crystal structure and thermal decomposition of two peroxovanadium complexes with coordinated ammonia molecules: [{VO(O2)2(NH3)}2{μ-Cu(NH3)4}] and [Zn(NH3)4][VO(O2)2(NH3)]2
| Autor: | Jozef Tatiersky, Peter Schwendt, Jana Chrappová, Dorota Dudášová, Jaromír Marek |
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| Rok vydání: | 2008 |
| Předmět: |
010405 organic chemistry
Stereochemistry Chemistry Thermal decomposition Infrared spectroscopy chemistry.chemical_element Crystal structure 010402 general chemistry 01 natural sciences Decomposition Copper 0104 chemical sciences Inorganic Chemistry Crystallography Materials Chemistry Molecule Physical and Theoretical Chemistry Single crystal Monoclinic crystal system |
| Zdroj: | Polyhedron. 27:641-647 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2007.10.016 |
| Popis: | The compounds [{VO(O2)2(NH3)}2{μ-Cu(NH3)4}] (1) and [Zn(NH3)4][VO(O2)2(NH3)]2 (2) were prepared and characterized by elemental analysis and infrared spectra. The single crystal X-ray study revealed that the structure of 1 consists of trinuclear complex molecules [(NH3)OV(O2)2{μ-Cu(NH3)4}(O2)2VO(NH3)] with a rare heterobimetalic peroxo bridge: copper(II)–peroxo ligand–vanadium(V). The structure of 2 is composed of tetraamminezinc(II) cations and ammineoxodiperoxovanadate(V) anions. In course of thermal decomposition of 1 performed up to 620 °C, the following intermediate products: [Cu(NH3)2(VO3)2], and subsequently a mixture of V2O5 with monoclinic β-Cu2V2O7, were gradually formed. The final product of decomposition is Cu(VO3)2. The thermal decomposition of 2 is a two-step process. In the first stage, [Zn(NH3)3(VO3)2] as supposed intermediate was formed, which transformed at higher temperatures by release of ammonia molecules to the monoclinic modification of Zn(VO3)2. |
| Databáze: | OpenAIRE |
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