| Autor: |
Pod'yachev, S. N., Mustafina, A. R., Ermolaeva, L. V., Vul'fson, S. G., Pashkurov, N. G. |
| Zdroj: |
Russian Chemical Bulletin; May 1994, Vol. 43 Issue: 5 p799-802, 4p |
| Abstrakt: |
Complex formation of 4,6-dimethyl-2-(1H)-pyrimidinone (thione) with dysprosium(III) tris(acetylacetonate), Dy(acac)3, in 80% (v/v) aqueous methanol was investigated by pH-metric titration and paramagnetic birefringence. Due to its higher basicity and lower acidity, 4,6-dimethyl-2-(1H)-pyrimidinone is coordinated by Dy(acac)3 without deprotonation, whereas its thio analog is coordinated in the deprotonated form. Due to the higher acidity of 4,6-dimethyl-2-(1H)-pyrimidinethione, the complex of its anion with Dy(acac)3 is much more stable than that derived from the oxo analog, as inferred from the comparison of the stability constants. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink