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Conductometric study of complexation reaction of 4′-nitrobenzo-15-crown-5 with Mn+2, Co+2, Y+3, and ZrO+2 cations in acetonitrile, methanol and their binary solvent solutions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Esmaelpourfarkhani, Masoomeh Rounaghi, Golam Hossein Zavvar, Mohammad Hossein Arbab |
| Copyright Year | 2014 |
| Abstract | The complexation reactions of Mn2+, Co2+, Y3+, and ZrO2+ cations with the macrocyclic ligand, 4′-nitrobenz-15-crown-5 (4′-NB15C5), in acetonitrile (AN), methanol and AN-MeOH binary mixtures have been studied at various temperatures using the conductometric method. The conductance data stand for the Me : L stoichiometric ratio 1 : 1. Values of the formation constants of the complexes were accumulated by plotting molar conductivity curves using the computer program, GENPLOT. The order of stability of the metal-ion complexes in pure AN at 15°C was found to be: (4′-NB15C5 · ZrO)2+ > (4′-NB15C5 · Mn)2+ ≈ (4′-NB15C5 · Co)2+ > (4′-NB15C5 · Y)3+. In the case of AN-MeOH binary solvent solutions with 50 and 75 mole percent of AN at the same temperature, the sequence of stability of the complexes was the following: (4′-NB15C5 · Mn)2+ > (4′-NB15C5 · ZrO)2+ ≈ (4′-NB15C5 · Co)2+ 〉 (4′-NB15C5 · Y)3+, and (4′-NB15C5 · Mn)2+ > (4′-NB15C5 · Y)3+ ≈ (4′-NB15C5 · Co)2+ > (4′-NB15C5 · ZrO)2+, respectively. The complexes formed are entropy stabilized in all cases. |
| Starting Page | 1219 |
| Ending Page | 1224 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1134/S1070363214060280 |
| Volume Number | 84 |
| Alternate Webpage(s) | https://profdoc.um.ac.ir/articles/a/1045976.pdf |
| Alternate Webpage(s) | https://doi.org/10.1134/S1070363214060280 |
| Journal | Russian Journal of General Chemistry |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
