Abstract
59Co NMR signal of Co(H2O)63+ was observed and the chemical shift and the spin-lattice relaxation time were recorded as a function of temperature. No deviation due to an exchange with paramagnetic high-spin cobalt(III) could be observed in the chemical shift. An increase in the spin-lattice relaxation rate was observed at high temperatures. However, following the dependence of the relaxation rates on acid concentration, this increase was associated with an increased formation of Co(H2O)5OH2+ at high temperatures. An approximate upper limit for the fractin of Co(H2O)63+ which is present as high spin was estimated as f < 10-4.
Original language | English |
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Pages (from-to) | 3547-3549 |
Number of pages | 3 |
Journal | Journal of Physical Chemistry |
Volume | 85 |
Issue number | 24 |
DOIs | |
State | Published - 1981 |