| Autor: |
Vugman Ney V., Pinhal Nelson M., Santos Cristina M. P. dos, Faria Roberto B., Amorim Hélio S. de |
| Jazyk: |
angličtina |
| Rok vydání: |
2000 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society, Vol 11, Iss 3, Pp 257-260 (2000) |
| Druh dokumentu: |
article |
| ISSN: |
0103-5053 |
| Popis: |
Amorphous potassium pentacyanonitrosylruthenate (II) was synthesized and characterized by UV, IR, X-ray diffraction and thermogravimetric analysis. Electron Spin Resonance spectroscopy reveals the presence of paramagnetic ruthenate (I) complexes and NO2 radicals in the X-irradiated diamagnetic salt. Spin-hamiltonian parameters of the [Ru(CN)5NO]3- complex (g^ or = 2.0064, A^ (14N) = 60.7 MHz, g|| = 1.999, A|| (14N) = 77.3 MHz ) support an electron capture in a pi* molecular orbital of the nitrosyl group mixed with d xz and d yz ruthenium orbitals as recently predicted by theoretical calculations. Silver ions, present as impurities, are reduced to Ag(0) by X-irradiation and coordinate to four magnetically equivalent nitrogens in a distorted site, giving rise to a well resolved anisotropic ESR powder spectrum. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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